onitor hot-plug on Wayland crashes compositor → Power Management settings fail to load AND apps crashes

Steps to reproduce:

  1. Run KDE Plasma session on Wayland with an external monitor.
  2. Unplug the monitor.
  3. Plug it back on.
  4. Observe session crash.
  5. All apps are crashed (steam, telegram desktop, thunderbird)
  6. Open System Settings → Power Management → error appears.
    Power Management settings could not be loaded, The Power Management Service appears not to be running.

Observed Behavior:

  • Wayland compositor crashes, triggering numerous “Wayland connection broke” errors.
  • PowerDevil logs include “Failed to write to the pipe: Bad file descriptor” and “creating placeholder screen.”
  • System Settings fails to open Power Management.

Expected Behavior:

  • Hot-plug should work seamlessly; Power Management should load normally.

System Info:

  • OS: Arch Linux
  • Plasma: 6.4.4
  • KDE Frameworks: 6.17.0
  • Qt: 6.9.2
  • Kernel: 6.16.4-2-cachyos
  • GPU: RTX 4090 Driver version: 580.76.05

Logs:

journalctl -b | grep powerdevil

Summary

Aug 30 12:08:29 corrm-pc org_kde_powerdevil[1359]: The Wayland connection broke. Did the Wayland compositor die?
Aug 30 12:08:29 corrm-pc org_kde_powerdevil[1359]: qt.qpa.wayland: Attempting wayland reconnect
Aug 30 12:08:29 corrm-pc org_kde_powerdevil[1359]: Failed to write to the pipe: Bad file descriptor.
Aug 30 12:08:29 corrm-pc org_kde_powerdevil[1359]: qt.qpa.wayland: There are no outputs - creating placeholder screen
Aug 30 12:08:29 corrm-pc org_kde_powerdevil[1359]: [ 1525] Removing connected display on bus 2
Aug 30 12:08:29 corrm-pc org_kde_powerdevil[1359]: [ 1525] (dw_remove_display_by_businfo) No Display_Ref found for i2c bus: 2
Aug 30 12:08:29 corrm-pc org_kde_powerdevil[1359]: [ 1525] Removing connected display on bus 3
Aug 30 12:08:29 corrm-pc org_kde_powerdevil[1359]: [ 1525] (dw_remove_display_by_businfo) No Display_Ref found for i2c bus: 3
Aug 30 12:08:29 corrm-pc org_kde_powerdevil[1359]: X connection to :0 broken (explicit kill or server shutdown).
Aug 30 12:08:29 corrm-pc org_kde_powerdevil[1359]: QSocketNotifier: Socket notifiers cannot be enabled or disabled from another thread
Aug 30 12:08:29 corrm-pc org_kde_powerdevil[1359]: QtDBus: cannot relay signals from parent QObject(0x5627dda780c0 “”) unless they are emitted in the object’s thread QThread(0x5627dd9cf0b0 “Qt mainThread”). Current thread is QThread(0x7f0628001c20 “”).
Aug 30 12:08:29 corrm-pc org_kde_powerdevil[1359]: [ 1525] Watch thread terminated.

oredumpctl -1 info kwin_wayland

Summary
       PID: 1192 (kwin_wayland)
       UID: 1000 (corrm)
       GID: 1000 (corrm)
    Signal: 11 (SEGV)
 Timestamp: Sat 2025-08-30 12:08:28 EEST (8h ago)

Command Line: /usr/bin/kwin_wayland --wayland-fd 7 --socket wayland-0 --xwayland-fd 8 --xwayland-fd 9 --xwayland-display :0 --xwayland-xauthority /run/user/1000/xauth_DytWJb --xwayland
Executable: /usr/bin/kwin_wayland
Control Group: /user.slice/user-1000.slice/user@1000.service/session.slice/plasma-kwin_wayland.service
Unit: user@1000.service
User Unit: plasma-kwin_wayland.service
Slice: user-1000.slice
Owner UID: 1000 (corrm)
Boot ID: ab30569bd35f434ab0f6e826512003d2
Machine ID: c147a63ad602456e8c0ae12c3a5c644f
Hostname: corrm-pc
Storage: /var/lib/systemd/coredump/core.kwin_wayland.1000.ab30569bd35f434ab0f6e826512003d2.1192.1756544908000000.zst (inaccessible)
Message: Process 1192 (kwin_wayland) of user 1000 dumped core.

            Stack trace of thread 1192:
            #0  0x00007f312cd9908d n/a (libc.so.6 + 0x19908d)
            #1  0x00007f31305859b3 n/a (libkwin.so.6 + 0x5859b3)
            #2  0x00007f312bbd12ae n/a (libffi.so.8 + 0x82ae)
            #3  0x00007f312bbcd9f8 n/a (libffi.so.8 + 0x49f8)
            #4  0x00007f312bbd068e ffi_call (libffi.so.8 + 0x768e)
            #5  0x00007f312d30e220 n/a (libwayland-server.so.0 + 0x6220)
            #6  0x00007f312d314134 n/a (libwayland-server.so.0 + 0xc134)
            #7  0x00007f312d312642 wl_event_loop_dispatch (libwayland-server.so.0 + 0xa642)
            #8  0x00007f3130592fc7 _ZN4KWin7Display14dispatchEventsEv (libkwin.so.6 + 0x592fc7)
            #9  0x00007f312d5e9e94 n/a (libQt6Core.so.6 + 0x1e9e94)
            #10 0x00007f312d5f8d91 _ZN15QSocketNotifier5eventEP6QEvent (libQt6Core.so.6 + 0x1f8d91)
            #11 0x00007f312e901769 _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt6Widgets.so.6 + 0x101769)
            #12 0x00007f312d57b0d8 _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt6Core.so.6 + 0x17b0d8)
            #13 0x00007f312d755188 _ZN27QEventDispatcherUNIXPrivate23activateSocketNotifiersEv (libQt6Core.so.6 + 0x355188)
            #14 0x00007f312d755bd7 _ZN20QEventDispatcherUNIX13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x355bd7)
            #15 0x00007f312e3a7d62 _ZN23QUnixEventDispatcherQPA13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Gui.so.6 + 0x7a7d62)
            #16 0x00007f312d588d76 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x188d76)
            #17 0x00007f312d58000c _ZN16QCoreApplication4execEv (libQt6Core.so.6 + 0x18000c)
            #18 0x0000562f789e4e63 n/a (/usr/bin/kwin_wayland + 0x40e63)
            #19 0x00007f312cc27b8b n/a (libc.so.6 + 0x27b8b)
            #20 0x00007f312cc27c4b __libc_start_main (libc.so.6 + 0x27c4b)
            #21 0x0000562f789ec135 n/a (/usr/bin/kwin_wayland + 0x48135)
            
            Stack trace of thread 1221:
            #0  0x00007f312ccb0872 n/a (libc.so.6 + 0xb0872)
            #1  0x00007f312cca42d8 n/a (libc.so.6 + 0xa42d8)
            #2  0x00007f312cd2caf3 ppoll (libc.so.6 + 0x12caf3)
            #3  0x00007f312c012420 n/a (libglib-2.0.so.0 + 0x68420)
            #4  0x00007f312c012502 g_main_context_iteration (libglib-2.0.so.0 + 0x68502)
            #5  0x00007f312d87e85b _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x47e85b)
            #6  0x00007f312d588d76 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x188d76)
            #7  0x00007f312d6adfc1 _ZN7QThread4execEv (libQt6Core.so.6 + 0x2adfc1)
            #8  0x00007f312db79b4f n/a (libQt6DBus.so.6 + 0x37b4f)
            #9  0x00007f312d74c3ff n/a (libQt6Core.so.6 + 0x34c3ff)
            #10 0x00007f312cca80d6 n/a (libc.so.6 + 0xa80d6)
            #11 0x00007f312cd3b01c n/a (libc.so.6 + 0x13b01c)
            
            Stack trace of thread 1228:
            #0  0x00007f312ccb0872 n/a (libc.so.6 + 0xb0872)
            #1  0x00007f312cca42d8 n/a (libc.so.6 + 0xa42d8)
            #2  0x00007f312cd2caf3 ppoll (libc.so.6 + 0x12caf3)
            #3  0x00007f312c012420 n/a (libglib-2.0.so.0 + 0x68420)
            #4  0x00007f312c012502 g_main_context_iteration (libglib-2.0.so.0 + 0x68502)
            #5  0x00007f312d87e85b _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x47e85b)
            #6  0x00007f312d588d76 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x188d76)
            #7  0x00007f312d6ae13f _ZN7QThread3runEv (libQt6Core.so.6 + 0x2ae13f)
            #8  0x00007f312d74c3ff n/a (libQt6Core.so.6 + 0x34c3ff)
            #9  0x00007f312cca80d6 n/a (libc.so.6 + 0xa80d6)
            #10 0x00007f312cd3b01c n/a (libc.so.6 + 0x13b01c)
            
            Stack trace of thread 1244:
            #0  0x00007f312ccb0872 n/a (libc.so.6 + 0xb0872)
            #1  0x00007f312cca42d8 n/a (libc.so.6 + 0xa42d8)
            #2  0x00007f312cd2caf3 ppoll (libc.so.6 + 0x12caf3)
            #3  0x00007f312c012420 n/a (libglib-2.0.so.0 + 0x68420)
            #4  0x00007f312c012502 g_main_context_iteration (libglib-2.0.so.0 + 0x68502)
            #5  0x00007f312d87e85b _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x47e85b)
            #6  0x00007f312d588d76 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x188d76)
            #7  0x00007f312d6ae13f _ZN7QThread3runEv (libQt6Core.so.6 + 0x2ae13f)
            #8  0x00007f312d74c3ff n/a (libQt6Core.so.6 + 0x34c3ff)
            #9  0x00007f312cca80d6 n/a (libc.so.6 + 0xa80d6)
            #10 0x00007f312cd3b01c n/a (libc.so.6 + 0x13b01c)
            
            Stack trace of thread 10430:
            #0  0x00007f312ccb0872 n/a (libc.so.6 + 0xb0872)
            #1  0x00007f312cca4248 n/a (libc.so.6 + 0xa4248)
            #2  0x00007f312cca49a3 n/a (libc.so.6 + 0xa49a3)
            #3  0x00007f312cca7773 pthread_cond_timedwait (libc.so.6 + 0xa7773)
            #4  0x00007f312d75cd6f _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x35cd6f)
            #5  0x00007f312d75641c n/a (libQt6Core.so.6 + 0x35641c)
            #6  0x00007f312d74c3ff n/a (libQt6Core.so.6 + 0x34c3ff)
            #7  0x00007f312cca80d6 n/a (libc.so.6 + 0xa80d6)
            #8  0x00007f312cd3b01c n/a (libc.so.6 + 0x13b01c)
            
            Stack trace of thread 10429:
            #0  0x00007f312ccb0872 n/a (libc.so.6 + 0xb0872)
            #1  0x00007f312cca4248 n/a (libc.so.6 + 0xa4248)
            #2  0x00007f312cca49a3 n/a (libc.so.6 + 0xa49a3)
            #3  0x00007f312cca7773 pthread_cond_timedwait (libc.so.6 + 0xa7773)
            #4  0x00007f312d75cd6f _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x35cd6f)
            #5  0x00007f312d75641c n/a (libQt6Core.so.6 + 0x35641c)
            #6  0x00007f312d74c3ff n/a (libQt6Core.so.6 + 0x34c3ff)
            #7  0x00007f312cca80d6 n/a (libc.so.6 + 0xa80d6)
            #8  0x00007f312cd3b01c n/a (libc.so.6 + 0x13b01c)
            
            Stack trace of thread 10432:
            #0  0x00007f312ccb0872 n/a (libc.so.6 + 0xb0872)
            #1  0x00007f312cca4248 n/a (libc.so.6 + 0xa4248)
            #2  0x00007f312cca49a3 n/a (libc.so.6 + 0xa49a3)
            #3  0x00007f312cca7773 pthread_cond_timedwait (libc.so.6 + 0xa7773)
            #4  0x00007f312d75cd6f _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x35cd6f)
            #5  0x00007f312d75641c n/a (libQt6Core.so.6 + 0x35641c)
            #6  0x00007f312d74c3ff n/a (libQt6Core.so.6 + 0x34c3ff)
            #7  0x00007f312cca80d6 n/a (libc.so.6 + 0xa80d6)
            #8  0x00007f312cd3b01c n/a (libc.so.6 + 0x13b01c)
            
            Stack trace of thread 10431:
            #0  0x00007f312ccb0872 n/a (libc.so.6 + 0xb0872)
            #1  0x00007f312cca4248 n/a (libc.so.6 + 0xa4248)
            #2  0x00007f312cca49a3 n/a (libc.so.6 + 0xa49a3)
            #3  0x00007f312cca7773 pthread_cond_timedwait (libc.so.6 + 0xa7773)
            #4  0x00007f312d75cd6f _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x35cd6f)
            #5  0x00007f312d75641c n/a (libQt6Core.so.6 + 0x35641c)
            #6  0x00007f312d74c3ff n/a (libQt6Core.so.6 + 0x34c3ff)
            #7  0x00007f312cca80d6 n/a (libc.so.6 + 0xa80d6)
            #8  0x00007f312cd3b01c n/a (libc.so.6 + 0x13b01c)
            ELF object binary architecture: AMD x86-64

oredumpctl -1 info plasmashell

Summary
       PID: 1326 (plasmashell)
       UID: 1000 (corrm)
       GID: 1000 (corrm)
    Signal: 11 (SEGV)
 Timestamp: Sat 2025-08-30 06:56:05 EEST (13h ago)

Command Line: /usr/bin/plasmashell --no-respawn
Executable: /usr/bin/plasmashell
Control Group: /user.slice/user-1000.slice/user@1000.service/session.slice/plasma-plasmashell.service
Unit: user@1000.service
User Unit: plasma-plasmashell.service
Slice: user-1000.slice
Owner UID: 1000 (corrm)
Boot ID: 68681d1fa53543e6864d5488bd2a197d
Machine ID: c147a63ad602456e8c0ae12c3a5c644f
Hostname: corrm-pc
Storage: /var/lib/systemd/coredump/core.plasmashell.1000.68681d1fa53543e6864d5488bd2a197d.1326.1756526165000000.zst (present)
Size on Disk: 35.2M
Message: Process 1326 (plasmashell) of user 1000 dumped core.

            Stack trace of thread 22674:
            #0  0x0000000000000000 n/a (n/a + 0x0)
            #1  0x000000000000003a n/a (n/a + 0x0)
            #2  0x01f28bfac69971b9 n/a (n/a + 0x0)
            ELF object binary architecture: AMD x86-64

coredumpctl -1 gdb kwin_wayland

Summary
       PID: 1192 (kwin_wayland)
       UID: 1000 (corrm)
       GID: 1000 (corrm)
    Signal: 11 (SEGV)
 Timestamp: Sat 2025-08-30 12:08:28 EEST (8h ago)

Command Line: /usr/bin/kwin_wayland --wayland-fd 7 --socket wayland-0 --xwayland-fd 8 --xwayland-fd 9 --xwayland-display :0 --xwayland-xauthority /run/user/1000/xauth_DytWJb --xwayland
Executable: /usr/bin/kwin_wayland
Control Group: /user.slice/user-1000.slice/user@1000.service/session.slice/plasma-kwin_wayland.service
Unit: user@1000.service
User Unit: plasma-kwin_wayland.service
Slice: user-1000.slice
Owner UID: 1000 (corrm)
Boot ID: ab30569bd35f434ab0f6e826512003d2
Machine ID: c147a63ad602456e8c0ae12c3a5c644f
Hostname: corrm-pc
Storage: /var/lib/systemd/coredump/core.kwin_wayland.1000.ab30569bd35f434ab0f6e826512003d2.1192.1756544908000000.zst (inaccessible)
Message: Process 1192 (kwin_wayland) of user 1000 dumped core.

            Stack trace of thread 1192:
            #0  0x00007f312cd9908d n/a (libc.so.6 + 0x19908d)
            #1  0x00007f31305859b3 n/a (libkwin.so.6 + 0x5859b3)
            #2  0x00007f312bbd12ae n/a (libffi.so.8 + 0x82ae)
            #3  0x00007f312bbcd9f8 n/a (libffi.so.8 + 0x49f8)
            #4  0x00007f312bbd068e ffi_call (libffi.so.8 + 0x768e)
            #5  0x00007f312d30e220 n/a (libwayland-server.so.0 + 0x6220)
            #6  0x00007f312d314134 n/a (libwayland-server.so.0 + 0xc134)
            #7  0x00007f312d312642 wl_event_loop_dispatch (libwayland-server.so.0 + 0xa642)
            #8  0x00007f3130592fc7 _ZN4KWin7Display14dispatchEventsEv (libkwin.so.6 + 0x592fc7)
            #9  0x00007f312d5e9e94 n/a (libQt6Core.so.6 + 0x1e9e94)
            #10 0x00007f312d5f8d91 _ZN15QSocketNotifier5eventEP6QEvent (libQt6Core.so.6 + 0x1f8d91)
            #11 0x00007f312e901769 _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt6Widgets.so.6 + 0x101769)
            #12 0x00007f312d57b0d8 _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt6Core.so.6 + 0x17b0d8)
            #13 0x00007f312d755188 _ZN27QEventDispatcherUNIXPrivate23activateSocketNotifiersEv (libQt6Core.so.6 + 0x355188)
            #14 0x00007f312d755bd7 _ZN20QEventDispatcherUNIX13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x355bd7)
            #15 0x00007f312e3a7d62 _ZN23QUnixEventDispatcherQPA13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Gui.so.6 + 0x7a7d62)
            #16 0x00007f312d588d76 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x188d76)
            #17 0x00007f312d58000c _ZN16QCoreApplication4execEv (libQt6Core.so.6 + 0x18000c)
            #18 0x0000562f789e4e63 n/a (/usr/bin/kwin_wayland + 0x40e63)
            #19 0x00007f312cc27b8b n/a (libc.so.6 + 0x27b8b)
            #20 0x00007f312cc27c4b __libc_start_main (libc.so.6 + 0x27c4b)
            #21 0x0000562f789ec135 n/a (/usr/bin/kwin_wayland + 0x48135)

            Stack trace of thread 1221:
            #0  0x00007f312ccb0872 n/a (libc.so.6 + 0xb0872)
            #1  0x00007f312cca42d8 n/a (libc.so.6 + 0xa42d8)
            #2  0x00007f312cd2caf3 ppoll (libc.so.6 + 0x12caf3)
            #3  0x00007f312c012420 n/a (libglib-2.0.so.0 + 0x68420)
            #4  0x00007f312c012502 g_main_context_iteration (libglib-2.0.so.0 + 0x68502)
            #5  0x00007f312d87e85b _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x47e85b)
            #6  0x00007f312d588d76 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x188d76)
            #7  0x00007f312d6adfc1 _ZN7QThread4execEv (libQt6Core.so.6 + 0x2adfc1)
            #8  0x00007f312db79b4f n/a (libQt6DBus.so.6 + 0x37b4f)
            #9  0x00007f312d74c3ff n/a (libQt6Core.so.6 + 0x34c3ff)
            #10 0x00007f312cca80d6 n/a (libc.so.6 + 0xa80d6)
            #11 0x00007f312cd3b01c n/a (libc.so.6 + 0x13b01c)

            Stack trace of thread 1228:
            #0  0x00007f312ccb0872 n/a (libc.so.6 + 0xb0872)
            #1  0x00007f312cca42d8 n/a (libc.so.6 + 0xa42d8)
            #2  0x00007f312cd2caf3 ppoll (libc.so.6 + 0x12caf3)
            #3  0x00007f312c012420 n/a (libglib-2.0.so.0 + 0x68420)
            #4  0x00007f312c012502 g_main_context_iteration (libglib-2.0.so.0 + 0x68502)
            #5  0x00007f312d87e85b _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x47e85b)
            #6  0x00007f312d588d76 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x188d76)
            #7  0x00007f312d6ae13f _ZN7QThread3runEv (libQt6Core.so.6 + 0x2ae13f)
            #8  0x00007f312d74c3ff n/a (libQt6Core.so.6 + 0x34c3ff)
            #9  0x00007f312cca80d6 n/a (libc.so.6 + 0xa80d6)
            #10 0x00007f312cd3b01c n/a (libc.so.6 + 0x13b01c)

            Stack trace of thread 1244:
            #0  0x00007f312ccb0872 n/a (libc.so.6 + 0xb0872)
            #1  0x00007f312cca42d8 n/a (libc.so.6 + 0xa42d8)
            #2  0x00007f312cd2caf3 ppoll (libc.so.6 + 0x12caf3)
            #3  0x00007f312c012420 n/a (libglib-2.0.so.0 + 0x68420)
            #4  0x00007f312c012502 g_main_context_iteration (libglib-2.0.so.0 + 0x68502)
            #5  0x00007f312d87e85b _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x47e85b)
            #6  0x00007f312d588d76 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x188d76)
            #7  0x00007f312d6ae13f _ZN7QThread3runEv (libQt6Core.so.6 + 0x2ae13f)
            #8  0x00007f312d74c3ff n/a (libQt6Core.so.6 + 0x34c3ff)
            #9  0x00007f312cca80d6 n/a (libc.so.6 + 0xa80d6)
            #10 0x00007f312cd3b01c n/a (libc.so.6 + 0x13b01c)

            Stack trace of thread 10430:
            #0  0x00007f312ccb0872 n/a (libc.so.6 + 0xb0872)
            #1  0x00007f312cca4248 n/a (libc.so.6 + 0xa4248)
            #2  0x00007f312cca49a3 n/a (libc.so.6 + 0xa49a3)
            #3  0x00007f312cca7773 pthread_cond_timedwait (libc.so.6 + 0xa7773)
            #4  0x00007f312d75cd6f _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x35cd6f)
            #5  0x00007f312d75641c n/a (libQt6Core.so.6 + 0x35641c)
            #6  0x00007f312d74c3ff n/a (libQt6Core.so.6 + 0x34c3ff)
            #7  0x00007f312cca80d6 n/a (libc.so.6 + 0xa80d6)
            #8  0x00007f312cd3b01c n/a (libc.so.6 + 0x13b01c)

            Stack trace of thread 10429:
            #0  0x00007f312ccb0872 n/a (libc.so.6 + 0xb0872)
            #1  0x00007f312cca4248 n/a (libc.so.6 + 0xa4248)
            #2  0x00007f312cca49a3 n/a (libc.so.6 + 0xa49a3)
            #3  0x00007f312cca7773 pthread_cond_timedwait (libc.so.6 + 0xa7773)
            #4  0x00007f312d75cd6f _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x35cd6f)
            #5  0x00007f312d75641c n/a (libQt6Core.so.6 + 0x35641c)
            #6  0x00007f312d74c3ff n/a (libQt6Core.so.6 + 0x34c3ff)
            #7  0x00007f312cca80d6 n/a (libc.so.6 + 0xa80d6)
            #8  0x00007f312cd3b01c n/a (libc.so.6 + 0x13b01c)

            Stack trace of thread 10432:
            #0  0x00007f312ccb0872 n/a (libc.so.6 + 0xb0872)
            #1  0x00007f312cca4248 n/a (libc.so.6 + 0xa4248)
            #2  0x00007f312cca49a3 n/a (libc.so.6 + 0xa49a3)
            #3  0x00007f312cca7773 pthread_cond_timedwait (libc.so.6 + 0xa7773)
            #4  0x00007f312d75cd6f _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x35cd6f)
            #5  0x00007f312d75641c n/a (libQt6Core.so.6 + 0x35641c)
            #6  0x00007f312d74c3ff n/a (libQt6Core.so.6 + 0x34c3ff)
            #7  0x00007f312cca80d6 n/a (libc.so.6 + 0xa80d6)
            #8  0x00007f312cd3b01c n/a (libc.so.6 + 0x13b01c)

            Stack trace of thread 10431:
            #0  0x00007f312ccb0872 n/a (libc.so.6 + 0xb0872)
            #1  0x00007f312cca4248 n/a (libc.so.6 + 0xa4248)
            #2  0x00007f312cca49a3 n/a (libc.so.6 + 0xa49a3)
            #3  0x00007f312cca7773 pthread_cond_timedwait (libc.so.6 + 0xa7773)
            #4  0x00007f312d75cd6f _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x35cd6f)
            #5  0x00007f312d75641c n/a (libQt6Core.so.6 + 0x35641c)
            #6  0x00007f312d74c3ff n/a (libQt6Core.so.6 + 0x34c3ff)
            #7  0x00007f312cca80d6 n/a (libc.so.6 + 0xa80d6)
            #8  0x00007f312cd3b01c n/a (libc.so.6 + 0x13b01c)
            ELF object binary architecture: AMD x86-64

Failed to open /var/lib/systemd/coredump/core.kwin_wayland.1000.ab30569bd35f434ab0f6e826512003d2.1192.1756544908000000.zst: Permission denied

Any help? with that problem?

Since you have a backtrace, can you report this using https://bugs.kde.org?

Note that we need the backtrace to be complete and have debug symbols. Lines like this:

            #1  0x00007f31305859b3 n/a (libkwin.so.6 + 0x5859b3)

Aren’t useful because they don’t tell us where in libkwin the problem is.