Bug#1017613: kwin-x11 session stops working (semi-freeze) every few days

[Ralf Jung <post@ralfj.de>]

Package: kwin-x11
Version: 4:5.25.4-2
Severity: important

Dear Maintainer,

The latest update from kwin 4:5.24.5-1+b1 to 4:5.25.4-2 has made KDE very unreliable for me: every other day, the entire session just basically freezes up; I can still move the cursor, but that's about it.
Just before that happens, I usually get a black rectangle in the bottom right corner of the screen, where the Plasma notifications usually appear.
At that point I can still interact with the foreground application, but if I do alt-tab, then the session is doomed and I need to Ctrl-Alt-Backspace, losing all unsaved data.

Also see https://bugs.kde.org/show_bug.cgi?id=457847.

Kind regards,
Ralf

-- System Information:
Debian Release: bookworm/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'testing-debug'), (100, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.18.0-3-amd64 (SMP w/8 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_USER, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages kwin-x11 depends on:
ii  kwin-common                    4:5.25.4-2
ii  libc6                          2.34-3
ii  libepoxy0                      1.5.10-1
ii  libgcc-s1                      12.1.0-8
ii  libkdecorations2-5v5           4:5.25.4-1
ii  libkf5configcore5              5.96.0-1
ii  libkf5configgui5               5.96.0-1
ii  libkf5configwidgets5           5.96.0-1
ii  libkf5coreaddons5              5.96.0-1
ii  libkf5crash5                   5.96.0-1
ii  libkf5globalaccel-bin          5.96.0-1
ii  libkf5globalaccel5             5.96.0-1
ii  libkf5i18n5                    5.96.0-1
ii  libkf5notifications5           5.96.0-1
ii  libkf5plasma5                  5.96.0-1
ii  libkf5service-bin              5.96.0-1
ii  libkf5service5                 5.96.0-1
ii  libkf5windowsystem5            5.96.0-1
ii  libkwineffects13               4:5.25.4-2
ii  libkwinglutils13               4:5.25.4-2
ii  libkwinxrenderutils13          4:5.25.4-2
ii  libqaccessibilityclient-qt5-0  0.4.1-1+b1
ii  libqt5core5a                   5.15.4+dfsg-5
ii  libqt5dbus5                    5.15.4+dfsg-5
ii  libqt5gui5                     5.15.4+dfsg-5
ii  libqt5qml5                     5.15.4+dfsg-4
ii  libqt5widgets5                 5.15.4+dfsg-5
ii  libqt5x11extras5               5.15.4-2
ii  libstdc++6                     12.1.0-8
ii  libx11-6                       2:1.8.1-2
ii  libxcb-composite0              1.15-1
ii  libxcb-keysyms1                0.4.0-1+b2
ii  libxcb-randr0                  1.15-1
ii  libxcb-render0                 1.15-1
ii  libxcb-shape0                  1.15-1
ii  libxcb-xfixes0                 1.15-1
ii  libxcb1                        1.15-1
ii  libxi6                         2:1.8-1

kwin-x11 recommends no packages.

kwin-x11 suggests no packages.

-- no debconf information