Bug#997022: kwin-x11: Black screen after attempting to enable compositing
Package: kwin-x11
Version: 4:5.23.0-2
Severity: important
When starting compositing in kwin (either by starting kwin with compositing
enabled, or by pressing Ctrl-Alt-F12 while kwin is running), the whole screen
goes black apart from the mouse cursor.
When this happens, kwin prints `kwin_core: Failed to initialize compositing,
compositing disable`. Further attempts to enable compositing via the keyboard
shortcut produce two lines: `kwin_core: Failed to initialize compositing,
compositing disable` and `kwin_core: XCB error: 10 (BadAccess), sequence: 2497,
resource id: 1730, major code: 142 (Composite), minor code: 2
(RedirectSubwindows)`.
Attempting to disable or enable compositing has no visible effect. The screen
simply remains black until kwin is killed.
-- System Information:
Debian Release: bookworm/sid
APT prefers unstable
APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 5.14.0-3-amd64 (SMP w/4 CPU threads)
Kernel taint flags: TAINT_CRAP, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en_US
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages kwin-x11 depends on:
ii kwin-common 4:5.23.0-2
ii libc6 2.32-4
ii libepoxy0 1.5.9-2
ii libgcc-s1 11.2.0-10
ii libkf5configcore5 5.86.0-1
ii libkf5coreaddons5 5.86.0-1
ii libkf5crash5 5.86.0-1
ii libkf5i18n5 5.86.0-1
ii libkf5quickaddons5 5.86.0-1
ii libkf5windowsystem5 5.86.0-1
ii libkwaylandserver5 [libkwaylandserver5-5.23] 5.23.0-1
ii libkwineffects13 4:5.23.0-2
ii libkwinglutils13 4:5.23.0-2
ii libkwinxrenderutils13 4:5.23.0-2
ii libqt5core5a 5.15.2+dfsg-12
ii libqt5dbus5 5.15.2+dfsg-12
ii libqt5gui5 5.15.2+dfsg-12
ii libqt5widgets5 5.15.2+dfsg-12
ii libqt5x11extras5 5.15.2-2
ii libstdc++6 11.2.0-10
ii libx11-6 2:1.7.2-2+b1
ii libxcb-composite0 1.14-3
ii libxcb-keysyms1 0.4.0-1+b2
ii libxcb-randr0 1.14-3
ii libxcb-render0 1.14-3
ii libxcb-shape0 1.14-3
ii libxcb-xfixes0 1.14-3
ii libxcb1 1.14-3
ii libxi6 2:1.8-1
kwin-x11 recommends no packages.
kwin-x11 suggests no packages.
-- no debconf information
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