This is a bug in mutter that is fixed in Gnome 43 and will get a fix for Gnome 42 but not likely before we get 43 here.
You can fix it for now on gnome 42 by modifying this pkgbuild
https://aur.archlinux.org/packages/mutter-performance
and adding these 2 MRs (click on the code button and download plain diff)
rename the diffs to mr2636.patch and mr2594.patch and put them in the directory you extracted the pkgbuild to next to the other .patch files.
your .SRCINFO should look like this
pkgbase = mutter-performance
pkgdesc = A window manager for GNOME | Attempts to improve performances with non-upstreamed merge-requests and frequent stable branch resync
pkgver = 42.5
pkgrel = 1
url = https://gitlab.gnome.org/GNOME/mutter
arch = x86_64
license = GPL
checkdepends = xorg-server-xvfb
checkdepends = pipewire-session-manager
checkdepends = python-dbusmock
makedepends = gobject-introspection
makedepends = git
makedepends = egl-wayland
makedepends = meson
makedepends = xorg-server
makedepends = wayland-protocols
makedepends = sysprof
makedepends = gi-docgen
depends = dconf
depends = gobject-introspection-runtime
depends = gsettings-desktop-schemas
depends = libcanberra
depends = startup-notification
depends = zenity
depends = libsm
depends = gnome-desktop
depends = libxkbcommon-x11
depends = gnome-settings-daemon
depends = libgudev
depends = libinput
depends = pipewire
depends = xorg-xwayland
depends = graphene
depends = libxkbfile
depends = libsysprof-capture
source = mutter-performance::git+https://gitlab.gnome.org/GNOME/mutter.git#commit=4b35c269c7ad2515f91d2d3ccaea7526e0cb5f97
source = mr2487.patch
source = mr2506.patch
source = mr2636.patch
source = mr2594.patch
sha256sums = SKIP
sha256sums = 1cdd4833e10c1f88311a52df1a34e3ad82641f75e2c1848a9367f2fbc8f8fd29
sha256sums = d6aa7d5b62b522fe6c448ec0c54826acd9ae19d49389fa26a456e2cdfbdf3294
sha256sums = SKIP
sha256sums = SKIP
pkgname = mutter-performance
groups = gnome
provides = mutter
provides = libmutter-10.so
conflicts = mutter
pkgname = mutter-performance-docs
pkgdesc = A window manager for GNOME | Attempts to improve performances with non-upstreamed merge-requests and frequent stable branch resync (documentation)
depends =
provides = mutter-docs
conflicts = mutter-docs
and the pkgbuild should look like this
# Patched package:
# Maintainer: Térence Clastres <t.clastres@gmail.com>
# Co-maintainer: Saren Arterius <saren@wtako.net>
# Co-maintainer: Mingi Sung <FiestaLake@protonmail.com>
# Contributor: Joakim Soderlund <joakim.soderlund@gmail.com>
# Official package:
# Maintainer: Jan Alexander Steffens (heftig) <heftig@archlinux.org>
# Contributor: Ionut Biru <ibiru@archlinux.org>
# Contributor: Michael Kanis <mkanis_at_gmx_dot_de>
### PACKAGE OPTIONS
## MERGE REQUESTS SELECTION
# Merge Requests List: ('579' '2487' '2506')
_merge_requests_to_use=('2487' '2506')
## Disable building a DOCS package
# Remember to unset this variable when producing .SRCINFO
: "${_disable_docs:=""}"
### IMPORTANT: Do no edit below this line unless you know what you're doing
pkgbase=mutter-performance
if [ -n "$_disable_docs" ]; then
pkgname=mutter-performance
else
pkgname=(mutter-performance mutter-performance-docs)
fi
pkgver=42.5
pkgrel=1
pkgdesc="A window manager for GNOME | Attempts to improve performances with non-upstreamed merge-requests and frequent stable branch resync"
url="https://gitlab.gnome.org/GNOME/mutter"
arch=(x86_64)
license=(GPL)
depends=(dconf gobject-introspection-runtime gsettings-desktop-schemas
libcanberra startup-notification zenity libsm gnome-desktop
libxkbcommon-x11 gnome-settings-daemon libgudev libinput pipewire
xorg-xwayland graphene libxkbfile libsysprof-capture)
makedepends=(gobject-introspection git egl-wayland meson xorg-server
wayland-protocols sysprof gi-docgen)
checkdepends=(xorg-server-xvfb pipewire-session-manager python-dbusmock)
_commit=4b35c269c7ad2515f91d2d3ccaea7526e0cb5f97 # tags/42.5^0
source=("$pkgname::git+https://gitlab.gnome.org/GNOME/mutter.git#commit=$_commit"
'mr2487.patch'
'mr2506.patch'
'mr2636.patch'
'mr2594.patch')
sha256sums=('SKIP'
'1cdd4833e10c1f88311a52df1a34e3ad82641f75e2c1848a9367f2fbc8f8fd29'
'd6aa7d5b62b522fe6c448ec0c54826acd9ae19d49389fa26a456e2cdfbdf3294'
'SKIP'
'SKIP')
pkgver() {
cd $pkgname
git describe --tags | sed 's/[^-]*-g/r&/;s/-/+/g'
}
pick_mr() {
for mr in "${_merge_requests_to_use[@]}"; do
if [ "$1" = "$mr" ]; then
if [ "$2" = "merge" ] || [ -z "$2" ]; then
echo "Downloading then Merging $1..."
curl -O "https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/$mr.diff"
git apply "$mr.diff"
elif [ "$3" = "revert" ]; then
echo "Reverting $1..."
git revert "$2" --no-commit
elif [ "$3" = "patch" ]; then
if [ -e ../"$2" ]; then
echo "Patching with $2..."
patch -Np1 -i ../"$2"
else
echo "Downloading $mr as $2 then patching..."
curl -O "https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/$mr.diff" -o "$2"
patch -Np1 -i "$2"
fi
else
echo "ERROR: wrong argument given: $2"
fi
break
fi
done
}
prepare() {
cd $pkgname
git reset --hard
git cherry-pick --abort || true
#git remote add vanvugt https://gitlab.gnome.org/vanvugt/mutter.git || true
#git remote add verdre https://gitlab.gnome.org/verdre/mutter.git || true
#git remote add 3v1no https://gitlab.gnome.org/3v1n0/mutter.git || true
#git fetch vanvugt
#git fetch verdre
#git fetch 3v1no
### Merge Requests
# Merge Request Prototype
# Title:
# Author:
# URL:
# Type:
# Status:
# Comment:
# git cherry-pick -n first_commit^..last_commit
#
# Possible Type:
# 1. Improvement: Makes an already existing feature behave better, more efficiently/reliably.
# 2. Feature: Adds a new functionality.
# 3. Fix: Regression/bug fix only available in master (not backported).
# 4. Cleanup: Code styling improvement, function deprecation, rearrangement...
#
# Possible Status:
# 1. Needs rebase: Conflicts with master branch.
# 2. Needs review: Mutter maintainers needs to review the new/updated MR and provide feedback.
# 3. Needs changes: MR needs to be adjusted based on maintainers feedback.
# 4. Merged: MR approved and it changes commited to master.
#
# Generally, a MR status oscillate between 2 and 3 and then becomes 4.
# Title: backends: Do not reload keymap on new keyboard notifications
# Author: Carlos Garnacho <carlosg@gnome.org>
# URL: https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/579
# Type: 1
# Status: 4
# Comment: Was reverted: https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/833
# If you use stenography software or play hardcore rhythm games like Lunatic Rave 2/osumania, use it.
pick_mr '579' ce86f90efbaa51522ba14c5b4cad933c2106de42 'revert'
# Title: Draft: Dynamic triple/double buffering (v4) for GNOME 42 maintenance
# Author: Daniel van Vugt <daniel.van.vugt@canonical.com>
# URL: https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2487
# Type: 1
# Status: 2 & 3
# Comment: Help GPU frequencies to scale up but not currently working on Wayland.
# Derived from !1441 to maintain gnome-42 base support.
# Thanks @JockeTF in AUR for the patch backported to gnome-41 base.
pick_mr '2487' 'mr2487.patch' 'patch'
# Title: compositor: Use native GL mipmapping instead of MetaTextureTower (v2)
# Author: Daniel van Vugt <daniel.van.vugt@canonical.com>
# Author: Neil Moore <dar13.dev@gmail.com>
# URL: https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2506
# Type: 3
# Status: 4
# Comment: Fix #849 (Window previews in the overview are not mipmapped on HiDPI)
# (v2) Move the original functionality into its own separate class.
pick_mr '2506' 'mr2506.patch' 'patch'
patch -Np1 -i $srcdir/mr2636.patch
patch -Np1 -i $srcdir/mr2594.patch
}
build() {
CFLAGS="${CFLAGS/-O2/-O3} -fno-semantic-interposition"
LDFLAGS+=" -Wl,-Bsymbolic-functions"
if [ -n "$_disable_docs" ]; then
arch-meson $pkgname build \
-D egl_device=true \
-D wayland_eglstream=true \
-D docs=false \
-D installed_tests=false
else
arch-meson $pkgname build \
-D egl_device=true \
-D wayland_eglstream=true \
-D docs=true \
-D installed_tests=false
fi
meson compile -C build
}
_check() (
mkdir -p -m 700 "${XDG_RUNTIME_DIR:=$PWD/runtime-dir}"
glib-compile-schemas "${GSETTINGS_SCHEMA_DIR:=$PWD/build/data}"
export XDG_RUNTIME_DIR GSETTINGS_SCHEMA_DIR
local _pipewire_session_manager=$(pacman -Qq pipewire-session-manager)
pipewire &
_p1=$!
$_pipewire_session_manager &
_p2=$!
trap "kill $_p1 $_p2; wait" EXIT
meson test -C build --print-errorlogs -t 3
)
check() {
dbus-run-session xvfb-run -s '-nolisten local +iglx -noreset' \
bash -c "$(declare -f _check); _check"
}
_pick() {
local p="$1" f d; shift
for f; do
d="$srcdir/$p/${f#$pkgdir/}"
mkdir -p "$(dirname "$d")"
mv "$f" "$d"
rmdir -p --ignore-fail-on-non-empty "$(dirname "$f")"
done
}
package_mutter-performance() {
provides=(mutter libmutter-10.so)
conflicts=(mutter)
groups=(gnome)
meson install -C build --destdir "$pkgdir"
if ! [ -n "$_disable_docs" ]; then
_pick docs "$pkgdir"/usr/share/mutter-*/doc
fi
}
if ! [ -n "$_disable_docs" ]; then
package_mutter-performance-docs() {
provides=(mutter-docs)
conflicts=(mutter-docs)
pkgdesc+=" (documentation)"
depends=()
mv docs/* "$pkgdir"
}
fi
then run makepkg --nocheck -si (the checks part has some issues with pipewire in a running session that are annoying so we skip it)
This will build and install it, you can now use obs 28 on gnome 42 without crashing the session.