System frozen during update and failed to boot. KDE Plasma 6 SDDM

I tried and it helps! But not completely. System still stuck :frowning:

at first I run

paccheck --list-broken --md5sum

and about 15 packages appear. I updated them with pacman -S then run pacman -S linux-lts. After that reboot.

The things was running pretty good, most of errors during startup are gone.

But few left.

journalctl -p3 -xb -1
[root@EndeavourOS /]# journalctl -p3 -xb -1
Apr 25 05:19:42 thevoid kernel: x86/cpu: SGX disabled by BIOS.
Apr 25 05:19:43 thevoid kernel: 
Apr 25 05:19:53 thevoid kernel: nvidia-gpu 0000:01:00.3: i2c timeout error e0000000
Apr 25 05:19:53 thevoid kernel: ucsi_ccg 8-0008: i2c_transfer failed -110
Apr 25 05:19:53 thevoid kernel: ucsi_ccg 8-0008: ucsi_ccg_init failed - -110
Apr 25 05:20:00 thevoid systemd[1]: Failed to start D-Bus System Message Bus.
β–‘β–‘ Subject: A start job for unit dbus-broker.service has failed
β–‘β–‘ Defined-By: systemd
β–‘β–‘ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
β–‘β–‘ 
β–‘β–‘ A start job for unit dbus-broker.service has finished with a failure.
β–‘β–‘ 
β–‘β–‘ The job identifier is 287 and the job result is failed.
Apr 25 05:20:00 thevoid systemd[1]: Failed to start D-Bus System Message Bus.
β–‘β–‘ Subject: A start job for unit dbus-broker.service has failed
β–‘β–‘ Defined-By: systemd
β–‘β–‘ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
β–‘β–‘ 
β–‘β–‘ A start job for unit dbus-broker.service has finished with a failure.
β–‘β–‘ 
β–‘β–‘ The job identifier is 735 and the job result is failed.
Apr 25 05:20:00 thevoid systemd[1]: Failed to start D-Bus System Message Bus.
β–‘β–‘ Subject: A start job for unit dbus-broker.service has failed
β–‘β–‘ Defined-By: systemd
β–‘β–‘ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
β–‘β–‘ 
β–‘β–‘ A start job for unit dbus-broker.service has finished with a failure.
β–‘β–‘ 
β–‘β–‘ The job identifier is 850 and the job result is failed.
Apr 25 05:20:00 thevoid systemd[1]: Failed to start D-Bus System Message Bus.
β–‘β–‘ Subject: A start job for unit dbus-broker.service has failed
β–‘β–‘ Defined-By: systemd
β–‘β–‘ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
β–‘β–‘ 
β–‘β–‘ A start job for unit dbus-broker.service has finished with a failure.
β–‘β–‘ 
β–‘β–‘ The job identifier is 965 and the job result is failed.
Apr 25 05:20:00 thevoid systemd[1]: Failed to start D-Bus System Message Bus.
β–‘β–‘ Subject: A start job for unit dbus-broker.service has failed
β–‘β–‘ Defined-By: systemd
β–‘β–‘ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
β–‘β–‘ 
β–‘β–‘ A start job for unit dbus-broker.service has finished with a failure.
β–‘β–‘ 
β–‘β–‘ The job identifier is 1080 and the job result is failed.
Apr 25 05:20:00 thevoid systemd[1]: Failed to start D-Bus System Message Bus.
β–‘β–‘ Subject: A start job for unit dbus-broker.service has failed
β–‘β–‘ Defined-By: systemd
β–‘β–‘ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
β–‘β–‘ 
β–‘β–‘ A start job for unit dbus-broker.service has finished with a failure.
β–‘β–‘ 
β–‘β–‘ The job identifier is 1195 and the job result is failed.
Apr 25 05:20:00 thevoid systemd-logind[1400]: Failed to connect to system bus: Connection refused
Apr 25 05:20:00 thevoid systemd-logind[1400]: Failed to fully start up daemon: Connection refused
Apr 25 05:20:00 thevoid systemd[1]: Failed to start User Login Management.
β–‘β–‘ Subject: A start job for unit systemd-logind.service has failed
β–‘β–‘ Defined-By: systemd
β–‘β–‘ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
β–‘β–‘ 
β–‘β–‘ A start job for unit systemd-logind.service has finished with a failure.
β–‘β–‘ 
β–‘β–‘ The job identifier is 296 and the job result is failed.
Apr 25 05:20:00 thevoid systemd[1]: Failed to start D-Bus System Message Bus.
β–‘β–‘ Subject: A start job for unit dbus-broker.service has failed
β–‘β–‘ Defined-By: systemd
β–‘β–‘ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
β–‘β–‘ 
β–‘β–‘ A start job for unit dbus-broker.service has finished with a failure.
β–‘β–‘ 
β–‘β–‘ The job identifier is 1427 and the job result is failed.
Apr 25 05:20:00 thevoid avahi-daemon[1397]: dbus_bus_get_private(): Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
Apr 25 05:20:00 thevoid firewalld[1399]: ERROR: Exception DBusException: org.freedesktop.DBus.Error.NoServer: Failed to connect to socket /run/dbus/system_bus_socket: Connection refused
Apr 25 05:20:00 thevoid systemd-logind[1410]: Failed to connect to system bus: Connection refused
Apr 25 05:20:00 thevoid systemd-logind[1410]: Failed to fully start up daemon: Connection refused
Apr 25 05:20:00 thevoid systemd[1]: Failed to start Avahi mDNS/DNS-SD Stack.
β–‘β–‘ Subject: A start job for unit avahi-daemon.service has failed
β–‘β–‘ Defined-By: systemd
β–‘β–‘ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
β–‘β–‘ 
β–‘β–‘ A start job for unit avahi-daemon.service has finished with a failure.
β–‘β–‘ 
β–‘β–‘ The job identifier is 295 and the job result is failed.
Apr 25 05:20:01 thevoid systemd[1]: Failed to start User Login Management.
β–‘β–‘ Subject: A start job for unit systemd-logind.service has failed
β–‘β–‘ Defined-By: systemd
β–‘β–‘ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
β–‘β–‘ 
β–‘β–‘ A start job for unit systemd-logind.service has finished with a failure.
β–‘β–‘ 
β–‘β–‘ The job identifier is 1310 and the job result is failed.
Apr 25 05:20:01 thevoid systemd[1]: Failed to start D-Bus System Message Bus.
β–‘β–‘ Subject: A start job for unit dbus-broker.service has failed
β–‘β–‘ Defined-By: systemd
β–‘β–‘ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
β–‘β–‘ 
β–‘β–‘ A start job for unit dbus-broker.service has finished with a failure.
β–‘β–‘ 
β–‘β–‘ The job identifier is 1659 and the job result is failed.

Login Manager starts. Good. And also problem starts. Login Screen except avatar and input field completely white. After credentials entered system and dm doesn’t boot, I can only see cursor on the black screen.

After that I run livecd again and try to repeat process. paccheck shows me only one line

lsb-release

I tried to update it and kernel package but situation with main system leaves the same and after reboot into livecd paccheck continues show this package.

I also noticed some strange lines during update

:: Processing package changes...
(1/1) reinstalling lsb-release                                                                                                                                                                                                                                                                [---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------] 100%
ldconfig: File /usr/lib/libfwupd.so is empty, not checked.
ldconfig: File /usr/lib/libnvidia-opencl.so.1 is empty, not checked.
ldconfig: File /usr/lib/libnvidia-opencl.so.550.76 is empty, not checked.
ldconfig: File /usr/lib/libfwupd.so.2 is empty, not checked.
ldconfig: File /usr/lib/libfwupd.so.2.0.0 is empty, not checked.
ldconfig: File /usr/lib/libnvidia-opencl.so is empty, not checked.

looks like some nvidia packages or libraries is broken and prepend to update this package. And they probbaly break system start.

I tried reinstall nvidia with pacman -S by two ways
Way1:
pacman -S nvidia nvidia-utils

I broke this installation because nvidia depends on non lts linux kernel package

Way2:
pacman -S nvidia-lts nvidia-utils

process ran and completed successfuly, but with the same lines those in this post above, like during install lsb-release

looks like i need somehow reinstall nvidia libs but ways tried didn’t help. May you advice something?