Virt-manager won't start

I installed EndeavourOS on a newly built PC a couple of days ago and can’t get virt-manager to open. I followed the steps described in https://discovery.endeavouros.com/applications/how-to-install-virt-manager-complete-edition/2021/09/ to make sure the virtualization daemon is running correctly:

$ systemctl status libvirtd.service
● libvirtd.service - Virtualization daemon
     Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; enabled; preset: disabled)
     Active: active (running) since Mon 2022-08-29 10:27:38 CEST; 1h 59min left
TriggeredBy: ● libvirtd-admin.socket
             ● libvirtd.socket
             ● libvirtd-ro.socket
       Docs: man:libvirtd(8)
             https://libvirt.org
   Main PID: 629 (libvirtd)
      Tasks: 19 (limit: 32768)
     Memory: 25.2M
        CPU: 132ms
     CGroup: /system.slice/libvirtd.service
             └─629 /usr/bin/libvirtd --timeout 120

Aug 29 10:27:38 johannes-pc systemd[1]: Starting Virtualization daemon...
Aug 29 10:27:38 johannes-pc systemd[1]: Started Virtualization daemon.

Looks okay to me. But then I try to open the GUI, the program closes after 1 sec. typingvirt-manager in the Konsole produces no output. sudo journalctl -b -p err shows the following:

Aug 29 08:37:09 johannes-pc systemd-coredump[5409]: Process 5400 (virt-manager) of user 1000 dumped core.
                                                    
                                                    Module linux-vdso.so.1 with build-id b025581e73a0025a7c37d2675d905cbb898e65ae
                                                    Module libfuse.so.2 with build-id cc5fde90754346b4d5f7c516f7651b4596c911de
                                                    Module libjansson.so.4 with build-id 3c8928940a2c6ac9777345370a4a4edcebb07ee0
                                                    Module libpcre2-8.so.0 with build-id a0306c1eb7393936ed0fb7328c8bb117726c2adc
                                                    Module libguestfs.so.0 with build-id 8b4669129046cfdc857cda15f29d3c83f33ea38d
                                                    Module libguestfsmod.cpython-310-x86_64-linux-gnu.so with build-id 585e18ceb4259287c53747e90948ddb8622ee25e
                                                    Module libvirt-glib-1.0.so.0 with build-id 4ee7dea5e6d2a6325b7011788df0beaa996e191a
                                                    Module libdconfsettings.so with build-id 7a4ba7af122c4d11168004a9ea6def330f02089f
                                                    Module libwindow-decorations-gtk-module.so with build-id 9f41b9c6aea5d62a3f95e907184c83f206f836d3
                                                    Module libcolorreload-gtk-module.so with build-id 05e3eae8a3258bef0a96d37d72af5d7beec1829c
                                                    Module libogg.so.0 with build-id ca0cae30a809f10db1f16e54a23b4e5ff7b2c54c
                                                    Module libvorbis.so.0 with build-id f4e086347f6c1a66eb73cfe13974a29bd39aabca
                                                    Module libltdl.so.7 with build-id 6a619e7b85ea9702e595881863bc9e599565e8a0
                                                    Module libtdb.so.1 with build-id f2bdb5ac97b6addf2026d93b08c8d15defcd9bb8
                                                    Module libvorbisfile.so.3 with build-id 45d2551167a616d448beb033ba49394831992887
                                                    Module libcanberra.so.0 with build-id 8ddef69c9b84a86062c88a59510639cd908fc6d3
                                                    Module libcanberra-gtk3.so.0 with build-id 2e99c78f79bea4bc67ccd9a9f8fed562f89599ee
                                                    Module libcanberra-gtk-module.so with build-id cc626937222c6ce3f7bb45dbe6e862d0b1efba01
                                                    Module libxkbfile.so.1 with build-id dc74ddc73cb1178f037cdc608f7029a0bc9f69a1
                                                    Module libxklavier.so.16 with build-id cefd678b3d270e389f50a9686ad2db83a8c67494
                                                    Module libgnomekbd.so.8 with build-id b882b5db64abcb7fa2d5aab7d5bc8b35a809c149
                                                    Module libgnomekbdui.so.8 with build-id aab698bd15ae57cbcc8029bb1552df580d03b34b
                                                    Module libxapp.so.1 with build-id 37ec2cd0a10b801e46a990db9b6ec04a9e8b1f8b
                                                    Module libxapp-gtk3-module.so with build-id 52f3ac7cccb19903e4c8eedd9054273f622333f5
                                                    Module libgpg-error.so.0 with build-id 4738b8a9478177c202cccd64e0eb65d3dea2bfae
                                                    Module liblz4.so.1 with build-id e63600ab23b2f6997f42fac2fa56e1f02ce159a1
                                                    Module libgcrypt.so.20 with build-id 8bf3cb884124273640de797a3e77d86c98434ea4
                                                    Module libcap.so.2 with build-id 1f87347b85b55db2f75a2ecea5cb45d846dc7093
                                                    Module libsystemd.so.0 with build-id a664cbc6b724392704b96360284c40664d8d4c99
                                                    Module libjson-glib-1.0.so.0 with build-id 58decebd2c409d59b07f926ae4c513281918bc4d
                                                    Module libsqlite3.so.0 with build-id e35d23d9eef4b99c931412b3a1355e333fcb10a5
                                                    Module libicui18n.so.71 with build-id 6fd5c97fd2808ee29958bf809656d5885e7e8963
                                                    Module libstemmer.so.0 with build-id 013b48e71279a5ec55e3021fc0bd8fb10a08bae5
                                                    Module libatspi.so.0 with build-id 87bca381f073faea3b0ffd1ab06f5f8f204e24cf
                                                    Module libdbus-1.so.3 with build-id 7f4b16b4b407cbae2d7118d6f99610e29a18a56a
                                                    Module libtracker-sparql-3.0.so.0 with build-id 75ab4f2e3b5c479b5c4fc62793bf398ee28f4ab7
                                                    Module libcloudproviders.so.0 with build-id ed1d9c9e60be4e858ad148484767249be1edf95f
                                                    Module libatk-bridge-2.0.so.0 with build-id 1161ebbcc5aa791075dfa026671875e5417287bd
                                                    Module libatk-1.0.so.0 with build-id c2de8b4fcbd9681cef225fe3956a9608a2a664bb
                                                    Module libgtk-3.so.0 with build-id 48baf44dfd4d51f8c2b81d852eb44de692c16b19
                                                    Module libpangoft2-1.0.so.0 with build-id 4a5a975bc9e397294c88738430515901a51c304c
                                                    Module libXinerama.so.1 with build-id 8198240259261b612189e89c9fcfc902b025b382
                                                    Module libXrandr.so.2 with build-id 154e55f082ee9e685d0794c98c5b76ffe9c8868e
                                                    Module libXcomposite.so.1 with build-id 13228d108b290268d88510db494daefd5521cda0
                                                    Module libXfixes.so.3 with build-id 0a05c7e8714522bfbdd7c0027c3e2a94965664b0
                                                    Module libXdamage.so.1 with build-id a99dbe3fc2b01da9fbdd90d5ad00621f9022379f
                                                    Module libXcursor.so.1 with build-id f0525ae3715ac95f96a8cdb44795b03f831334b0
                                                    Module libXi.so.6 with build-id 16603be937a02a7e61b0b0395d064be7efd86f49
                                                    Module libwayland-egl.so.1 with build-id dd02a2af320297e68308cc698f75828529271a57
                                                    Module libwayland-cursor.so.0 with build-id 46a637dbcbb02d6712a201f177377b66598b9121
                                                    Module libwayland-client.so.0 with build-id 515c72111400d7bdbfbdfcec78d597e4986a5943
                                                    Module libxkbcommon.so.0 with build-id 6cf66eead3fcc20fe5df10162bfbcdcdc8b2a183
                                                    Module libpangocairo-1.0.so.0 with build-id 37f75358f8778498bcc26a1658107953d9495255
                                                    Module libepoxy.so.0 with build-id edc178a150c4255d124e1e1ecbdbecebd1a388cd
                                                    Module libgdk-3.so.0 with build-id 4a9a6d5ddd18f22c56c05773208f8808cefacab6
                                                    Module libtiff.so.5 with build-id 62a8aefb339c3cbe35d1089c66c527a7b090804c
                                                    Module libjpeg.so.8 with build-id 46dfd8b2cbe8a10d13cd3182a7b490d0959534f9
                                                    Module libgdk_pixbuf-2.0.so.0 with build-id b2822dc16bd1470683ce421978ad142c4f3c3f89
                                                    Module libdatrie.so.1 with build-id 6fe3b6ece2c8e7d11869fa051375128d8f808f58
                                                    Module libthai.so.0 with build-id a7ac5010b4275c49308021200d23690533952702
                                                    Module libfribidi.so.0 with build-id fe9f35ac2a0074108c8306c517793f7279bd9b37
                                                    Module libpango-1.0.so.0 with build-id a971a5fed3b8b9cf076fe5edb9a9f04ced3da211
                                                    Module _pickle.cpython-310-x86_64-linux-gnu.so with build-id be669ba4732dd837bf3b5b2162b8cf4a3f408ef1
                                                    Module unicodedata.cpython-310-x86_64-linux-gnu.so with build-id 671cdc6fd78f7980977648ae2236e2377859e2aa
                                                    Module _json.cpython-310-x86_64-linux-gnu.so with build-id af64ea16f6d76f2681b7c140865cc747436f94ce
                                                    Module _queue.cpython-310-x86_64-linux-gnu.so with build-id 2e063f0e7107443a266a00a30713ceb949b0ff5d
                                                    Module _heapq.cpython-310-x86_64-linux-gnu.so with build-id 7fb241ee1d305e3e737fbe96678455ecebf74d99
                                                    Module _blake2.cpython-310-x86_64-linux-gnu.so with build-id b78c627822d6727906324aadb274f371771ca2bd
                                                    Module _hashlib.cpython-310-x86_64-linux-gnu.so with build-id 58fbe0b0412336a3fe674abb233c6e1e6a2d6bc9
                                                    Module binascii.cpython-310-x86_64-linux-gnu.so with build-id 184aa8e19a9507a8dfd2480e804e0e5f75188f56
                                                    Module _ssl.cpython-310-x86_64-linux-gnu.so with build-id 8da313c3d5a96bf16f6ecab4c55518157491f0c5
                                                    Module _lzma.cpython-310-x86_64-linux-gnu.so with build-id 34ff24d3e03342cbd504433a196247171ce1ade1
                                                    Module _bz2.cpython-310-x86_64-linux-gnu.so with build-id a7798d8aae45ab117bfc9b71d4d99300fae10dba
                                                    Module zlib.cpython-310-x86_64-linux-gnu.so with build-id 39314d7667d26b5aed42cc540deab6c0116eb64b
                                                    Module _sha512.cpython-310-x86_64-linux-gnu.so with build-id 0b9c51463b81eb72af8d1b36bd8822490155e8cb
                                                    Module _random.cpython-310-x86_64-linux-gnu.so with build-id 8cc4f9833f0727aedc0ab0f12499ba05d71eb790
                                                    Module _bisect.cpython-310-x86_64-linux-gnu.so with build-id 35b582c11cf1d75153f685941e2f19e6b772fe5c
                                                    Module termios.cpython-310-x86_64-linux-gnu.so with build-id d18880872276b66fda04cacfdacdf5b01b9e29b8
                                                    Module libuuid.so.1 with build-id 9057a530e6b3b0e71f24602a0039c490c9a0b5a1
                                                    Module _uuid.cpython-310-x86_64-linux-gnu.so with build-id bbecffa58867881ff30399165d6fb568f3e32437
                                                    Module _posixsubprocess.cpython-310-x86_64-linux-gnu.so with build-id 6a4d1002c0f1ad3b3d1a778455ffceccd96c0a7d
                                                    Module fcntl.cpython-310-x86_64-linux-gnu.so with build-id 9f3f2985472aed1b8ddaf269360985c37195a9bc
                                                    Module pyexpat.cpython-310-x86_64-linux-gnu.so with build-id 234cc3282db44f00249d8720c6d13227673c03ca
                                                    Module _elementtree.cpython-310-x86_64-linux-gnu.so with build-id 0abf49085b80496eab921c610b654c8e4565f7b5
                                                    Module libxml2mod.so with build-id cad81af4dbacaf39ad7a08a20b04afa5e9e51788
                                                    Module _datetime.cpython-310-x86_64-linux-gnu.so with build-id 532ba457b9010e0c6ed1613638d965a5d9c9a698
                                                    Module libresolv.so.2 with build-id 6e92fdf0a76152939e57a562fd539c86076b5728
                                                    Module libkeyutils.so.1 with build-id ac405ddd17be10ce538da3211415ee50c8f8df79
                                                    Module libkrb5support.so.0 with build-id 15f223925ef59dee4379ebbc0fcd14eda9ba81a2
                                                    Module libcom_err.so.2 with build-id 3360a28740ffbbd5a5c0c21d09072445908707e5
                                                    Module libk5crypto.so.3 with build-id cc77a742cb62447a53d98285b41558b8acd92866
                                                    Module libkrb5.so.3 with build-id 371cc767dacb17cb42c9c44b88eebbed5ee9a756
                                                    Module libdl.so.2 with build-id 3b5b9c7c3efd20001319657d1972e90e853984e2
                                                    Module libstdc++.so.6 with build-id 735a3d0cc7699fd69337361cba4aedb644b2a7ed
                                                    Module libicudata.so.71 with build-id 4fef196388e678deb881978139e125e20ee2d94d
                                                    Module libpsl.so.5 with build-id 0229a201aaf5652186c9fdc192ebe52baf19d7f1
                                                    Module libnghttp2.so.14 with build-id 16f0981d5251b03b11a49236ac403562ee458887
                                                    Module libgssapi_krb5.so.2 with build-id 292f1ce32161c0ecc4a287bc8494d5d7c420a03f
                                                    Module libcrypto.so.1.1 with build-id 7981ea3d69f3c28e46ee312a815af96eab93775c
                                                    Module libssl.so.1.1 with build-id e6b1f97a5b60b4248c49dfc5b11f53f281b507d0
                                                    Module libgmp.so.10 with build-id 26cec2ebe94cc5c4cb99e6988717347222b324fd
                                                    Module libhogweed.so.6 with build-id 5c4a99ad0aabe13bd9b517f92ab339436a2bc1f2
                                                    Module libnettle.so.8 with build-id 6a26cbe6819abc8c57668f80ca8c8160fd85e29e
                                                    Module libtasn1.so.6 with build-id fa2f7a5bfbcda1481ab5875d5744730ea1be8fb1
                                                    Module libunistring.so.2 with build-id 617dbf3d3d6f85d6556a7a036e23845e95490158
                                                    Module libidn2.so.0 with build-id b16e7570b102789b13ff77289762dbfe3f8f46bc
                                                    Module libzstd.so.1 with build-id ab54c2881f53ab314e134f3e08c76d504376dd5d
                                                    Module libbrotlienc.so.1 with build-id 74adbc62e4fbb5da9d37b5aa458471f4130862ff
                                                    Module libp11-kit.so.0 with build-id cc372ea3c28c4d3dfc633b4d2e933c8584d2af16
                                                    Module liblzma.so.5 with build-id d08f5868cd5adcc6b7c53bf1725aac65bd4539cd
                                                    Module libicuuc.so.71 with build-id 633fdc0c5385d916571f6140e7a978ad0630ef55
                                                    Module libgcc_s.so.1 with build-id 85db482c4585a328d95ec41124337a967bb24d8f
                                                    Module libcurl.so.4 with build-id 8e801dde5d7263a70bb78c67350f5762277ab9c1
                                                    Module libtirpc.so.3 with build-id 8f5e329f75d897df033d761ca1f742f90619c1b6
                                                    Module libsasl2.so.3 with build-id 0c10b132405d1c16805173607ae5496c9bc84ba7
                                                    Module libssh.so.4 with build-id fe1ec17767692cf2bba3a0a28f327e3cafcdf2fe
                                                    Module libssh2.so.1 with build-id a4adfe44cc7ebd295b3b783361acc3dcfcea1d50
                                                    Module libyajl.so.2 with build-id 392467faca2d964441b8226ee48d994ffc70e545
                                                    Module libnuma.so.1 with build-id 2aaab8ea0cb790da09e545d3d7ac30cd246d7e52
                                                    Module libnl-3.so.200 with build-id 46f3feeefe77129f1eeaa5f20ddd8561821f1924
                                                    Module libgnutls.so.30 with build-id 509d52b11320a5492b06215b816e4f65d26c15d5
                                                    Module libcap-ng.so.0 with build-id 707f9d3134a43306625e3dab8662899ea368ac91
                                                    Module libaudit.so.1 with build-id 53c797475ffeed05918d78f49f85dbf4127fb174
                                                    Module libacl.so.1 with build-id 27869ed0219ade5d2ffd50eaee11f967187faa8b
                                                    Module libxml2.so.2 with build-id 8cdf00fa954d9a27f2f184c4d354cb14677446ac
                                                    Module libvirt.so.0 with build-id 4a9f0d2e85f0c7d9cb375ef7a8500d83fd1b3a5c
                                                    Module libvirtmod.cpython-310-x86_64-linux-gnu.so with build-id 5a3263bd7906da0aa9f883ce46d22dcf369b0bf3
                                                    Module _struct.cpython-310-x86_64-linux-gnu.so with build-id ca8a852b5db81a217f6ad6e71f5f053a15c03253
                                                    Module array.cpython-310-x86_64-linux-gnu.so with build-id 3d9362fd41af470b1d406ce6df817be35472c5f9
                                                    Module select.cpython-310-x86_64-linux-gnu.so with build-id 3268a89a6f99e97ecaffea90a520d122bd08f839
                                                    Module math.cpython-310-x86_64-linux-gnu.so with build-id e37c9d6446b7395aadd15b5af9aabb1dcedf636e
                                                    Module _socket.cpython-310-x86_64-linux-gnu.so with build-id 634ff1b6ade33f72b188084953f562d3134cfd64
                                                    Module _cairo.cpython-310-x86_64-linux-gnu.so with build-id 215c40d2d858459dcd157fb8d3d4baf47abe848a
                                                    Module libbrotlicommon.so.1 with build-id acfd597a977c8087bb6184383daae2e828a9ce42
                                                    Module libgraphite2.so.3 with build-id ce58945ebb55b86d3a4e717b6eae29efc4720d8e
                                                    Module libXdmcp.so.6 with build-id d864159ab0008415667db8d5f251696d75c90df2
                                                    Module libXau.so.6 with build-id 60db1eac70f819bea9d4c366603c1583067510b4
                                                    Module libbrotlidec.so.1 with build-id 66c54e9301f7e102ecc1d88547e5f0e8a056fe22
                                                    Module libharfbuzz.so.0 with build-id 236ab65053439e673a39fcb7aadedb28b17a338a
                                                    Module libbz2.so.1.0 with build-id 919597c477c9b2cb9cdbb7745ed6494ac0e6da60
                                                    Module libexpat.so.1 with build-id 113bb5a3e9ad856801bfcfc029102c9bdc13d67e
                                                    Module libpixman-1.so.0 with build-id d2170a3ac106c2a68597bf7910ab04b1cdd69c14
                                                    Module libxcb-shm.so.0 with build-id 828fec4d856e2710e732ea8d92c3f250c807b1c2
                                                    Module libxcb-render.so.0 with build-id b1ca498d665807ab0ccdafbe8070853efd058173
                                                    Module libxcb.so.1 with build-id 13d677412a71468381b11092915d231f664d18d3
                                                    Module libXrender.so.1 with build-id 42e386d2acf3cde61081959d9671ca74acfb3edc
                                                    Module libXext.so.6 with build-id 17beadf1cb40d41ab36629db3b4eed74110678a7
                                                    Module libX11.so.6 with build-id 21e886e968772b7964d646f54c1faecc56734de9
                                                    Module libfreetype.so.6 with build-id f89dd5502e75aca28fb5c3ccd0dbd26fe822bfef
                                                    Module libfontconfig.so.1 with build-id 36be6951b8c1e42a7dd05684a37400fc8ef9147c
                                                    Module libpng16.so.16 with build-id 2dc0bce07f199bf983c07a05fb95a6f4af83a9b3
                                                    Module libcairo-gobject.so.2 with build-id 9927090dddfb180365695a8f37d1cac89463f109
                                                    Module libcairo.so.2 with build-id a222d042e56108d2786ece7bf291b56ba2069591
                                                    Module _gi_cairo.cpython-310-x86_64-linux-gnu.so with build-id 25d91afa4abd3d841e119d4bcf7b75eed2814608
                                                    Module libblkid.so.1 with build-id fb2c5d3c17aac74758a3eb80a2bc1c16bcf183b1
                                                    Module libmount.so.1 with build-id 9064fc3620c42e6f7aed38119f0a3ec39fca9a37
                                                    Module libz.so.1 with build-id fefe3219a96d682ec98fcfb78866b8594298b5a2
                                                    Module libpthread.so.0 with build-id 135923f9a38592e2e90692c8191278a166f86569
                                                    Module libgio-2.0.so.0 with build-id 7a769ec24a9a705d04ee0297730032f70ed0835b
                                                    Module libgmodule-2.0.so.0 with build-id abd986222e2cf12fc7324cb0182dfc2c8f2269c0
                                                    Module libpcre.so.1 with build-id 845483dd0acba86de9f0313102bebbaf3ce52767
                                                    Module libffi.so.8 with build-id f0a9586cf0f42d2b9971bd1065ca3a6b19f4a2c2
                                                    Module libgobject-2.0.so.0 with build-id a7515bd8cd51064d187953c0f506a43958de31a6
                                                    Module libgirepository-1.0.so.1 with build-id e90459be4a81e316d337c7be79d5c32e53e7c9c8
                                                    Module libglib-2.0.so.0 with build-id 1340f3a762b2293ebf6d725edf0eb14839f85317
                                                    Module _gi.cpython-310-x86_64-linux-gnu.so with build-id f2bb2965eb49fd3554296878ac5687d3973a02bb
                                                    Module ld-linux-x86-64.so.2 with build-id da64753d57bf3801827448f53d911b041568e727
                                                    Module libm.so.6 with build-id 0b8d43ea2dae21a1c5e44c3f0a9dc2fb292d27c0
                                                    Module libc.so.6 with build-id 9c28cfc869012ebbd43cdb0f1eebcd14e1b8bdd8
                                                    Module libpython3.10.so.1.0 with build-id 9299e39e864db6becea79ec4bac9efbc75bcf756
                                                    Module python3.10 with build-id fface608e21cb7e530436e7269505ce416d2619c
                                                    Stack trace of thread 5400:
                                                    #0  0x00007f79c049f4dc n/a (libc.so.6 + 0x884dc)
                                                    #1  0x00007f79c044f998 raise (libc.so.6 + 0x38998)
                                                    #2  0x00007f79c043953d abort (libc.so.6 + 0x2253d)
                                                    #3  0x00007f79bfa8306a n/a (libglib-2.0.so.0 + 0x1d06a)
                                                    #4  0x00007f79bfae39cf g_assertion_message_error (libglib-2.0.so.0 + 0x7d9cf)
                                                    #5  0x00007f79b9c25dc7 n/a (libgtk-3.so.0 + 0x1acdc7)
                                                    #6  0x00007f79b9c2616f n/a (libgtk-3.so.0 + 0x1ad16f)
                                                    #7  0x00007f79b9c264b8 n/a (libgtk-3.so.0 + 0x1ad4b8)
                                                    #8  0x00007f79b9c35ac5 n/a (libgtk-3.so.0 + 0x1bcac5)
                                                    #9  0x00007f79b9b81097 n/a (libgtk-3.so.0 + 0x108097)
                                                    #10 0x00007f79b9b87fcf n/a (libgtk-3.so.0 + 0x10efcf)
                                                    #11 0x00007f79b9c31ec7 n/a (libgtk-3.so.0 + 0x1b8ec7)
                                                    #12 0x00007f79b9cfdaaa n/a (libgtk-3.so.0 + 0x284aaa)
                                                    #13 0x00007f79b9cfe8dd gtk_widget_get_preferred_height_and_baseline_for_width (libgtk-3.so.0 + 0x2858dd)
                                                    #14 0x00007f79b9b364de n/a (libgtk-3.so.0 + 0xbd4de)
                                                    #15 0x00007f79b9b81097 n/a (libgtk-3.so.0 + 0x108097)
                                                    #16 0x00007f79b9b87fcf n/a (libgtk-3.so.0 + 0x10efcf)
                                                    #17 0x00007f79b9b2ebd7 n/a (libgtk-3.so.0 + 0xb5bd7)
                                                    #18 0x00007f79b9cfdaaa n/a (libgtk-3.so.0 + 0x284aaa)
                                                    #19 0x00007f79b9cfe8dd gtk_widget_get_preferred_height_and_baseline_for_width (libgtk-3.so.0 + 0x2858dd)
                                                    #20 0x00007f79b9b81097 n/a (libgtk-3.so.0 + 0x108097)
                                                    #21 0x00007f79b9b87fcf n/a (libgtk-3.so.0 + 0x10efcf)
                                                    #22 0x00007f79b9b3a217 n/a (libgtk-3.so.0 + 0xc1217)
                                                    #23 0x00007f79b9cfdaaa n/a (libgtk-3.so.0 + 0x284aaa)
                                                    #24 0x00007f79b9cfe679 gtk_widget_get_preferred_height (libgtk-3.so.0 + 0x285679)
                                                    #25 0x00007f79b9cfe130 n/a (libgtk-3.so.0 + 0x285130)
                                                    #26 0x00007f79b9cfe8dd gtk_widget_get_preferred_height_and_baseline_for_width (libgtk-3.so.0 + 0x2858dd)
                                                    #27 0x00007f79b9e744c4 n/a (libgtk-3.so.0 + 0x3fb4c4)
                                                    #28 0x00007f79b9d5b9ce n/a (libgtk-3.so.0 + 0x2e29ce)
                                                    #29 0x00007f79b9b81097 n/a (libgtk-3.so.0 + 0x108097)
                                                    #30 0x00007f79b9b87fcf n/a (libgtk-3.so.0 + 0x10efcf)
                                                    #31 0x00007f79b9d54e77 n/a (libgtk-3.so.0 + 0x2dbe77)
                                                    #32 0x00007f79b9cfdb42 n/a (libgtk-3.so.0 + 0x284b42)
                                                    #33 0x00007f79b9cfe5ce gtk_widget_get_preferred_width (libgtk-3.so.0 + 0x2855ce)
                                                    #34 0x00007f79b9b36460 n/a (libgtk-3.so.0 + 0xbd460)
                                                    #35 0x00007f79b9b81097 n/a (libgtk-3.so.0 + 0x108097)
                                                    #36 0x00007f79b9b87fcf n/a (libgtk-3.so.0 + 0x10efcf)
                                                    #37 0x00007f79b9b2eb47 n/a (libgtk-3.so.0 + 0xb5b47)
                                                    #38 0x00007f79b9cfdb42 n/a (libgtk-3.so.0 + 0x284b42)
                                                    #39 0x00007f79b9cfe5ce gtk_widget_get_preferred_width (libgtk-3.so.0 + 0x2855ce)
                                                    #40 0x00007f79b9b36460 n/a (libgtk-3.so.0 + 0xbd460)
                                                    #41 0x00007f79b9b81097 n/a (libgtk-3.so.0 + 0x108097)
                                                    #42 0x00007f79b9b87fcf n/a (libgtk-3.so.0 + 0x10efcf)
                                                    #43 0x00007f79b9b2eb47 n/a (libgtk-3.so.0 + 0xb5b47)
                                                    #44 0x00007f79b9cfdb42 n/a (libgtk-3.so.0 + 0x284b42)
                                                    #45 0x00007f79b9cfe5ce gtk_widget_get_preferred_width (libgtk-3.so.0 + 0x2855ce)
                                                    #46 0x00007f79b9dca483 n/a (libgtk-3.so.0 + 0x351483)
                                                    #47 0x00007f79b9cfdb42 n/a (libgtk-3.so.0 + 0x284b42)
                                                    #48 0x00007f79b9cfe5ce gtk_widget_get_preferred_width (libgtk-3.so.0 + 0x2855ce)
                                                    #49 0x00007f79b9e7443e n/a (libgtk-3.so.0 + 0x3fb43e)
                                                    #50 0x00007f79b9dc8018 n/a (libgtk-3.so.0 + 0x34f018)
                                                    #51 0x00007f79b9dca00a n/a (libgtk-3.so.0 + 0x35100a)
                                                    #52 0x00007f79bf9f6fd0 g_closure_invoke (libgobject-2.0.so.0 + 0x13fd0)
                                                    #53 0x00007f79bfa23437 n/a (libgobject-2.0.so.0 + 0x40437)
                                                    #54 0x00007f79bfa14be5 g_signal_emit_valist (libgobject-2.0.so.0 + 0x31be5)
                                                    #55 0x00007f79bfa14e74 g_signal_emit (libgobject-2.0.so.0 + 0x31e74)
                                                    #56 0x00007f79b9dac709 gtk_widget_realize (libgtk-3.so.0 + 0x333709)
                                                    #57 0x00007f79b9dcb9cc n/a (libgtk-3.so.0 + 0x3529cc)
                                                    #58 0x00007f79bf9f6fd0 g_closure_invoke (libgobject-2.0.so.0 + 0x13fd0)
                                                    #59 0x00007f79bfa23437 n/a (libgobject-2.0.so.0 + 0x40437)
                                                    #60 0x00007f79bfa14be5 g_signal_emit_valist (libgobject-2.0.so.0 + 0x31be5)
                                                    #61 0x00007f79bfa14e74 g_signal_emit (libgobject-2.0.so.0 + 0x31e74)
                                                    #62 0x00007f79b9dad457 gtk_widget_show (libgtk-3.so.0 + 0x334457)
                                                    #63 0x00007f79bf9de536 n/a (libffi.so.8 + 0x7536)
                                                    
                                                    Stack trace of thread 5402:
                                                    #0  0x00007f79c0511e9f __poll (libc.so.6 + 0xfae9f)
                                                    #1  0x00007f79bfb10f68 n/a (libglib-2.0.so.0 + 0xaaf68)
                                                    #2  0x00007f79bfab8392 g_main_context_iteration (libglib-2.0.so.0 + 0x52392)
                                                    #3  0x00007f79b865debe n/a (libdconfsettings.so + 0x5ebe)
                                                    #4  0x00007f79bfaea405 n/a (libglib-2.0.so.0 + 0x84405)
                                                    #5  0x00007f79c049d78d n/a (libc.so.6 + 0x8678d)
                                                    #6  0x00007f79c051e8e4 __clone (libc.so.6 + 0x1078e4)
                                                    
                                                    Stack trace of thread 5401:
                                                    #0  0x00007f79c0511e9f __poll (libc.so.6 + 0xfae9f)
                                                    #1  0x00007f79bfb10f68 n/a (libglib-2.0.so.0 + 0xaaf68)
                                                    #2  0x00007f79bfab8392 g_main_context_iteration (libglib-2.0.so.0 + 0x52392)
                                                    #3  0x00007f79bfab83e2 n/a (libglib-2.0.so.0 + 0x523e2)
                                                    #4  0x00007f79bfaea405 n/a (libglib-2.0.so.0 + 0x84405)
                                                    #5  0x00007f79c049d78d n/a (libc.so.6 + 0x8678d)
                                                    #6  0x00007f79c051e8e4 __clone (libc.so.6 + 0x1078e4)
                                                    
                                                    Stack trace of thread 5404:
                                                    #0  0x00007f79c049a346 n/a (libc.so.6 + 0x83346)
                                                    #1  0x00007f79c04a5530 n/a (libc.so.6 + 0x8e530)
                                                    #2  0x00007f79c07215b1 PyThread_acquire_lock_timed (libpython3.10.so.1.0 + 0x1235b1)
                                                    #3  0x00007f79c07f7851 n/a (libpython3.10.so.1.0 + 0x1f9851)
                                                    #4  0x00007f79c07f760f n/a (libpython3.10.so.1.0 + 0x1f960f)
                                                    #5  0x00007f79c0754f83 n/a (libpython3.10.so.1.0 + 0x156f83)
                                                    #6  0x00007f79c0743a2a _PyEval_EvalFrameDefault (libpython3.10.so.1.0 + 0x145a2a)
                                                    #7  0x00007f79c0754319 _PyFunction_Vectorcall (libpython3.10.so.1.0 + 0x156319)
                                                    #8  0x00007f79c0743a2a _PyEval_EvalFrameDefault (libpython3.10.so.1.0 + 0x145a2a)
                                                    #9  0x00007f79c0754319 _PyFunction_Vectorcall (libpython3.10.so.1.0 + 0x156319)
                                                    #10 0x00007f79c0743a2a _PyEval_EvalFrameDefault (libpython3.10.so.1.0 + 0x145a2a)
                                                    #11 0x00007f79c075f9d2 n/a (libpython3.10.so.1.0 + 0x1619d2)
                                                    #12 0x00007f79c07460ce _PyEval_EvalFrameDefault (libpython3.10.so.1.0 + 0x1480ce)
                                                    #13 0x00007f79c0754319 _PyFunction_Vectorcall (libpython3.10.so.1.0 + 0x156319)
                                                    #14 0x00007f79c0743a2a _PyEval_EvalFrameDefault (libpython3.10.so.1.0 + 0x145a2a)
                                                    #15 0x00007f79c0754319 _PyFunction_Vectorcall (libpython3.10.so.1.0 + 0x156319)
                                                    #16 0x00007f79c0743a2a _PyEval_EvalFrameDefault (libpython3.10.so.1.0 + 0x145a2a)
                                                    #17 0x00007f79c075f9d2 n/a (libpython3.10.so.1.0 + 0x1619d2)
                                                    #18 0x00007f79c083eed7 n/a (libpython3.10.so.1.0 + 0x240ed7)
                                                    #19 0x00007f79c0815578 n/a (libpython3.10.so.1.0 + 0x217578)
                                                    #20 0x00007f79c049d78d n/a (libc.so.6 + 0x8678d)
                                                    #21 0x00007f79c051e8e4 __clone (libc.so.6 + 0x1078e4)
                                                    
                                                    Stack trace of thread 5403:
                                                    #0  0x00007f79c0511e9f __poll (libc.so.6 + 0xfae9f)
                                                    #1  0x00007f79bfb10f68 n/a (libglib-2.0.so.0 + 0xaaf68)
                                                    #2  0x00007f79bfaba1cf g_main_loop_run (libglib-2.0.so.0 + 0x541cf)
                                                    #3  0x00007f79bf896acc n/a (libgio-2.0.so.0 + 0x108acc)
                                                    #4  0x00007f79bfaea405 n/a (libglib-2.0.so.0 + 0x84405)
                                                    #5  0x00007f79c049d78d n/a (libc.so.6 + 0x8678d)
                                                    #6  0x00007f79c051e8e4 __clone (libc.so.6 + 0x1078e4)
                                                    ELF object binary architecture: AMD x86-64

Any ideas?

Is everything at the same version level? Run sudo pacman -Syu then reboot and try again.

Just checked and for me virtmanager runs just fine so no general issue…
Usually it would show an error report if parts are missing or failing…
But i do not setup the part to run as normal user could be that?

1 Like

Yes, I just ran the update again and restarted. No luck :frowning:

I tried just installing virt-manager at first. On my last system I got a few error messages what is missing, if I remember correctly. This time nothing happened from the start. Even after setting everything up…

2022-08-29_14-58
running fine here… also after following all steps exactly like in the tutorial to start as my user…
Could be you have not enabled virtualisation support in your system firmware setup (Bios)

1 Like

I fixed that already before posting. I noticed that libvirtd.service wouldn’t run but as you can see in my post, that’s not an issue anymore. It’s just virt-manager that does something weird.

1 Like

I think I know what the issue is. I just created a new user and logged into the other account. virt-manager opens normally (albeit it can’t access the qemu). So it must be some user settings that I accidentally copied over.

1 Like

I still have no clue how to solve it though as I can’t find any config files for virt-manager. Neither in the home folder nor anywhere else. The locations mentioned here dare not correct (anymore).

virt-manager is just a gui front-end. I am not sure if it has config files of it’s own or not.

The libvirt configs are in /etc/libvirt

1 Like

I removed that folder and rebooted. Nothing has changed :frowning:

I finally fixed it. And the solution was really stupid. I had tried to find help on the virt-manger command but for some reason didn’t think of googling for the man page. I finally did this morning and found out here that virt-manager --debug exists:

$ virt-manager --debug
[Tue, 30 Aug 2022 10:55:47 virt-manager 32322] DEBUG (cli:204) Version 4.1.0 launched with command line: /usr/bin/virt-manager --debug
[Tue, 30 Aug 2022 10:55:47 virt-manager 32322] DEBUG (virtmanager:167) virt-manager version: 4.1.0
[Tue, 30 Aug 2022 10:55:47 virt-manager 32322] DEBUG (virtmanager:168) virtManager import: /usr/share/virt-manager/virtManager
[Tue, 30 Aug 2022 10:55:47 virt-manager 32322] DEBUG (virtmanager:205) PyGObject version: 3.42.2
[Tue, 30 Aug 2022 10:55:47 virt-manager 32322] DEBUG (virtmanager:209) GTK version: 3.24.34
[Tue, 30 Aug 2022 10:55:47 virt-manager 32322] DEBUG (systray:476) Showing systray: False
[Tue, 30 Aug 2022 10:55:47 virt-manager 32322] DEBUG (inspection:203) python guestfs is installed
[Tue, 30 Aug 2022 10:55:47 virt-manager 32322] DEBUG (inspection:225) libguestfs gsetting enabled=False
[Tue, 30 Aug 2022 10:55:47 virt-manager 32322] DEBUG (engine:113) Loading stored URIs:
qemu:///system
[Tue, 30 Aug 2022 10:55:47 virt-manager 32322] DEBUG (engine:461) processing cli command uri= show_window=manager domain=
[Tue, 30 Aug 2022 10:55:47 virt-manager 32322] DEBUG (engine:464) No cli action requested, launching default window

(virt-manager:32322): Gtk-WARNING **: 10:55:47.629: Could not load a pixbuf from icon theme.
This may indicate that pixbuf loaders or the mime database could not be found.
**
Gtk:ERROR:../gtk/gtk/gtkiconhelper.c:494:ensure_surface_for_gicon: assertion failed (error == NULL): Failed to load /home/johannes/.local/share/icons/Tela-dark/24/actions/image-missing.svg: Error opening file /home/johannes/.local/share/icons/Tela-dark/24/actions/image-missing.svg: No such file or directory (g-io-error-quark, 1)
Bail out! Gtk:ERROR:../gtk/gtk/gtkiconhelper.c:494:ensure_surface_for_gicon: assertion failed (error == NULL): Failed to load /home/johannes/.local/share/icons/Tela-dark/24/actions/image-missing.svg: Error opening file /home/johannes/.local/share/icons/Tela-dark/24/actions/image-missing.svg: No such file or directory (g-io-error-quark, 1)
Aborted (core dumped)

Wait, so the problem is missing Icons??? Yes, even changing the icon theme to Tela green dark fixes the issue :man_facepalming:.

1 Like

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