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Libwayland update causes Plasma desktop freeze on login



Hi,
after upgrading libwayland-* packages from backports Plasma desktop failing to start freezing the system at login.

Downgrading the packages to the previous version everything goes back to normal.

These are the updated packages:
Upgrade: libwayland-cursor0:amd64 (1.21.0-1, 1.23.0-1~bpo12+1), libwayland-server0:amd64 (1.21.0-1, 1.23.0-1~bpo12+1), wayland-protocols:amd64 (1.31-1, 1.37-1~bpo12+1), libwayland-egl1:amd64 (1.21.0-1, 1.23.0-1~bpo12+1), libwayland-bin:amd64 (1.21.0-1, 1.23.0-1~bpo12+1), libwayland-dev:amd64 (1.21.0-1, 1.23.0-1~bpo12+1), libwayland-client0:amd64 (1.21.0-1, 1.23.0-1~bpo12+1)

Searching for similar problems I found a debian bug (bug=1076729) and this article that seems to reproduce the same problems I had:
"A Critical Bug In Libwayland Update Causes Plasma Desktop Freeze On Debian Sid/Trixie"
https://ostechnix.com/libwayland-update-causes-plasma-desktop-freeze-on-debian/

At the moment I am not able to try solutions such as rebuild KWin or other system packages.

If the problem also affects other systems, I hope the information can be useful.

thanks for the support
enrico



this is what is in the 'system log' about wayland:

Sep 13 21:41:11 home.local systemd[3642]: Starting plasma-kwin_wayland.service - KDE Window Manager...
Sep 13 21:41:11 home.local systemd[3642]: Started plasma-kwin_wayland.service - KDE Window Manager.
Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: No backend specified, automatically choosing drm Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: wl_global_create: implemented version for 'wl_shm' higher than interface version (2 > 1) Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: kwin_wayland_drm: drmSetClientCap for Atomic Mode Setting failed. Using legacy mode on GPU "/dev/dri/card0"
Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: OpenGL vendor string:                   Intel
Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: OpenGL renderer string: Mesa Intel(R) HD Graphics 3000 (SNB GT2) Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: OpenGL version string: 3.3 (Core Profile) Mesa 22.3.6
Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: OpenGL shading language version string: 3.30
Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: Driver:                                 Intel
Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: GPU class: SandyBridge
Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: OpenGL version:                         3.3
Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: GLSL version:                           3.30
Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: Mesa version: 22.3.6 Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: Linux kernel version: 6.10.6
Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: Requires strict binding:                no
Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: GLSL shaders:                           yes
Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: Texture NPOT support:                   yes
Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: Virtual Machine:                        no
Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: kwin_wayland_drm: disabling connector "VGA-2-unknown" without a crtc Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: kwin_wayland_drm: disabling connector "HDMI-A-2-unknown" without a crtc Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: kwin_wayland_drm: disabling connector "VGA-2-unknown" without a crtc Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: kwin_wayland_drm: disabling connector "HDMI-A-2-unknown" without a crtc Sep 13 21:41:12 home.local kwin_wayland_wrapper[3993]: kwin_xkbcommon: XKB: inet:334:58: unrecognized keysym "XF86EmojiPicker"
Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE)
Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE) Backtrace:
Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE) 0: /bin/Xwayland (0x55b22833d000+0x178fe4) [0x55b2284b5fe4] Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE) 1: /bin/Xwayland (0x55b22833d000+0x17c9d9) [0x55b2284b99d9] Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f7a79651000+0x3c050) [0x7f7a7968d050] Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE) 3: /lib/x86_64-linux-gnu/libwayland-client.so.0 (wl_proxy_get_version+0x0) [0x7f7a79e801d0] Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE) 4: /bin/Xwayland (0x55b22833d000+0x3ce7d) [0x55b228379e7d] Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE) 5: /bin/Xwayland (0x55b22833d000+0x39ff2) [0x55b228376ff2] Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE) 6: /bin/Xwayland (0x55b22833d000+0x108381) [0x55b228445381] Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE) 7: /bin/Xwayland (0x55b22833d000+0xb4144) [0x55b2283f1144] Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE) 8: /bin/Xwayland (0x55b22833d000+0xa17aa) [0x55b2283de7aa] Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE) 9: /bin/Xwayland (0x55b22833d000+0xa2822) [0x55b2283df822] Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE) 10: /bin/Xwayland (0x55b22833d000+0xada39) [0x55b2283eaa39] Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE) 11: /lib/x86_64-linux-gnu/libc.so.6 (0x7f7a79651000+0x2724a) [0x7f7a7967824a] Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE) 12: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0x85) [0x7f7a79678305] Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE) 13: /bin/Xwayland (0x55b22833d000+0x33fe1) [0x55b228370fe1]
Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE)
Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE) Segmentation fault at address 0x40
Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE)
Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: Fatal server error:
Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE) Caught signal 11 (Segmentation fault). Server aborting
Sep 13 21:41:13 home.local kwin_wayland_wrapper[4044]: (EE)
Sep 13 21:41:38 home.local systemd[3642]: Stopping plasma-kwin_wayland.service - KDE Window Manager...


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