<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.kde.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.6"
          urlbase="https://bugs.kde.org/"
          
          maintainer="sysadmin@kde.org"
>

    <bug>
          <bug_id>502824</bug_id>
          
          <creation_ts>2025-04-15 09:54:47 +0000</creation_ts>
          <short_desc>One of 2 monitors freeze and then kwin crash</short_desc>
          <delta_ts>2025-04-15 18:09:41 +0000</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>8</classification_id>
          <classification>I don&apos;t know</classification>
          <product>kde</product>
          <component>general</component>
          <version>unspecified</version>
          <rep_platform>NixOS</rep_platform>
          <op_sys>Linux</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>DUPLICATE</resolution>
          <dup_id>496015</dup_id>
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>drkonqi</keywords>
          <priority>NOR</priority>
          <bug_severity>crash</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>0</everconfirmed>
          <reporter>boroditv</reporter>
          <assigned_to name="Unassigned bugs">unassigned-bugs-null</assigned_to>
          <cc>duha.bugs</cc>
          
          <cf_commitlink></cf_commitlink>
          <cf_versionfixedin></cf_versionfixedin>
          <cf_sentryurl>https://crash-reports.kde.org/organizations/kde/issues/3470/events/e8532fc6db934967a3dc60406ce88350/</cf_sentryurl>
          <votes>0</votes>

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>2416047</commentid>
    <comment_count>0</comment_count>
    <who name="">boroditv</who>
    <bug_when>2025-04-15 09:54:47 +0000</bug_when>
    <thetext>Application:  (6.2.5)

ApplicationNotResponding [ANR]: false
Qt Version: 6.8.2
Frameworks Version: 6.8.0
Operating System: Linux 6.6.87 x86_64
Windowing System: Wayland
Distribution: NixOS 24.11 (Vicuna)
DrKonqi: 6.2.5 [CoredumpBackend]

-- Information about the crash:
I have 2 monitors, 1920x1080 (left) and 3840x2160 (primary, 150% scaling). I use wayland, so problem related to kwin_wayland. Sometimes one or all of my monitors could freeze and stop updating image. Usually it happens with left, when my cursor on primary. I tried to disconnect freezed monitor, but that action also freezes primary, and after ~15 seconds kwin crashes, all non-qt windows are killed.
When I do journalctl --user -b -p3 it shows a lot of this lines and last is dumped core info:
Apr 15 12:23:44 bhd kwin_wayland[1609]: kwin_wayland_drm: Pageflip timed out! This is a kernel bug
Apr 15 12:23:49 bhd kwin_wayland[1609]: kwin_wayland_drm: Pageflip timed out! This is a kernel bug
Apr 15 12:23:59 bhd kwin_wayland[1609]: kwin_wayland_drm: Pageflip timed out! This is a kernel bug
Apr 15 12:24:04 bhd kwin_wayland[1609]: kwin_wayland_drm: Pageflip timed out! This is a kernel bug
Apr 15 12:24:09 bhd kwin_wayland[1609]: kwin_wayland_drm: Pageflip timed out! This is a kernel bug
Apr 15 12:24:14 bhd kwin_wayland[1609]: kwin_wayland_drm: Pageflip timed out! This is a kernel bug
Apr 15 12:24:19 bhd kwin_wayland[1609]: kwin_wayland_drm: Pageflip timed out! This is a kernel bug
Apr 15 12:24:24 bhd kwin_wayland[1609]: kwin_wayland_drm: Pageflip timed out! This is a kernel bug
Apr 15 12:24:29 bhd kwin_wayland[1609]: kwin_wayland_drm: Pageflip timed out! This is a kernel bug
Apr 15 12:24:34 bhd kwin_wayland[1609]: kwin_wayland_drm: Pageflip timed out! This is a kernel bug
Apr 15 12:24:39 bhd kwin_wayland[1609]: kwin_wayland_drm: Pageflip timed out! This is a kernel bug
Apr 15 12:24:43 bhd systemd-coredump[12203]: [🡕] Process 1609 (.kwin_wayland-w) of user 1337 dumped core.

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (), signal: Segmentation fault


warning: Can&apos;t open file /memfd:/.glXXXXXX (deleted) during file-backed mapping note processing

warning: Can&apos;t open file /memfd:gdk-wayland (deleted) during file-backed mapping note processing

warning: Can&apos;t open file /memfd:wayland-cursor (deleted) during file-backed mapping note processing

warning: Can&apos;t open file /memfd:wayland-shm (deleted) during file-backed mapping note processing

warning: Can&apos;t open file /memfd:JSGCHeap:QtQml (deleted) during file-backed mapping note processing

warning: Can&apos;t open file /memfd:JSVMStack:QtQml (deleted) during file-backed mapping note processing

warning: Can&apos;t open file /memfd:JITCode:QtQml (deleted) during file-backed mapping note processing

warning: Can&apos;t open file /memfd:unknown-usage:QtQml (deleted) during file-backed mapping note processing

warning: Can&apos;t open file /memfd:kwayland-shared (deleted) during file-backed mapping note processing

warning: Can&apos;t open file /memfd:sljit (deleted) during file-backed mapping note processing
[New LWP 1609]
[New LWP 1622]
[New LWP 1674]
[New LWP 1658]
[New LWP 1641]
[New LWP 1673]
[New LWP 1672]
[New LWP 1675]
[Thread debugging using libthread_db enabled]
Using host libthread_db library &quot;/nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libthread_db.so.1&quot;.
Core was generated by `/run/wrappers/bin/kwin_wayland --wayland-fd 7 --socket wayland-0 --xwayland-fd&apos;.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f0c9069a88c in __pthread_kill_implementation () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
[Current thread is 1 (Thread 0x7f0c7f43b080 (LWP 1609))]
warning: File &quot;/nix/store/mjzgvv9cqi991q02v69jnm33y0adykmh-glib-2.82.1/lib/libgobject-2.0.so.0.8200.1-gdb.py&quot; auto-loading has been declined by your `auto-load safe-path&apos; set to &quot;$debugdir:$datadir/auto-load:/nix/store/mhd0rk497xm0xnip7262xdw9bylvzh99-gcc-13.3.0-lib&quot;.
To enable execution of this file add
	add-auto-load-safe-path /nix/store/mjzgvv9cqi991q02v69jnm33y0adykmh-glib-2.82.1/lib/libgobject-2.0.so.0.8200.1-gdb.py
line to your configuration file &quot;/home/borodinskiy/.config/gdb/gdbinit&quot;.
To completely disable this security protection add
	set auto-load safe-path /
line to your configuration file &quot;/home/borodinskiy/.config/gdb/gdbinit&quot;.
For more information about this security protection see the
&quot;Auto-loading safe path&quot; section in the GDB manual.  E.g., run from the shell:
	info &quot;(gdb)Auto-loading safe path&quot;
warning: File &quot;/nix/store/mjzgvv9cqi991q02v69jnm33y0adykmh-glib-2.82.1/lib/libglib-2.0.so.0.8200.1-gdb.py&quot; auto-loading has been declined by your `auto-load safe-path&apos; set to &quot;$debugdir:$datadir/auto-load:/nix/store/mhd0rk497xm0xnip7262xdw9bylvzh99-gcc-13.3.0-lib&quot;.
warning: /python/gdb_preamble/preamble.py: No such file or directory
Python Exception &lt;class &apos;NameError&apos;&gt;: name &apos;print_preamble&apos; is not defined
/tmp/drkonqi.YrsKfX:4: Error in sourced command file:
Error occurred in Python: name &apos;print_preamble&apos; is not defined
[Current thread is 1 (Thread 0x7f0c7f43b080 (LWP 1609))]

Thread 8 (Thread 0x7f0c5106b6c0 (LWP 1675)):
#0  0x00007f0c9069513e in __futex_abstimed_wait_common () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#1  0x00007f0c90697c90 in pthread_cond_wait@@GLIBC_2.3.2 () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#2  0x00007f0c9455164f in std::_Function_handler&lt;std::unique_ptr&lt;std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter&gt; (), std::__future_base::_Task_setter&lt;std::unique_ptr&lt;std::__future_base::_Result&lt;void&gt;, std::__future_base::_Result_base::_Deleter&gt;, std::thread::_Invoker&lt;std::tuple&lt;QThread::create&lt;KWin::DrmCommitThread::DrmCommitThread(KWin::DrmGpu*, QString const&amp;)::{lambda()#1}&gt;(KWin::DrmCommitThread::DrmCommitThread(KWin::DrmGpu*, QString const&amp;)::{lambda()#1}&amp;&amp;)::{lambda((auto:1&amp;&amp;)...)#1}&gt; &gt;, void&gt; &gt;::_M_invoke(std::_Any_data const&amp;) () from /nix/store/nzv4dr42v1fma3kyxkglnch1g1p31wf8-kwin-6.2.5/lib/libkwin.so.6
#3  0x00007f0c94551c79 in std::__future_base::_State_baseV2::_M_do_set(std::function&lt;std::unique_ptr&lt;std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter&gt; ()&gt;*, bool*) () from /nix/store/nzv4dr42v1fma3kyxkglnch1g1p31wf8-kwin-6.2.5/lib/libkwin.so.6
#4  0x00007f0c9069dc1f in __pthread_once_slow () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#5  0x00007f0c9454e35a in std::__future_base::_Deferred_state&lt;std::thread::_Invoker&lt;std::tuple&lt;QThread::create&lt;KWin::DrmCommitThread::DrmCommitThread(KWin::DrmGpu*, QString const&amp;)::{lambda()#1}&gt;(KWin::DrmCommitThread::DrmCommitThread(KWin::DrmGpu*, QString const&amp;)::{lambda()#1}&amp;&amp;)::{lambda((auto:1&amp;&amp;)...)#1}&gt; &gt;, void&gt;::_M_complete_async() () from /nix/store/nzv4dr42v1fma3kyxkglnch1g1p31wf8-kwin-6.2.5/lib/libkwin.so.6
#6  0x00007f0c90eb31b6 in QThreadCreateThread::run() () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#7  0x00007f0c90f50961 in QThreadPrivate::start(void*) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#8  0x00007f0c90698af3 in start_thread () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#9  0x00007f0c90717f4c in __clone3 () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6

Thread 7 (Thread 0x7f0c5286e6c0 (LWP 1672)):
#0  0x00007f0c9069513e in __futex_abstimed_wait_common () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#1  0x00007f0c90697c90 in pthread_cond_wait@@GLIBC_2.3.2 () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#2  0x00007f0c9455164f in std::_Function_handler&lt;std::unique_ptr&lt;std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter&gt; (), std::__future_base::_Task_setter&lt;std::unique_ptr&lt;std::__future_base::_Result&lt;void&gt;, std::__future_base::_Result_base::_Deleter&gt;, std::thread::_Invoker&lt;std::tuple&lt;QThread::create&lt;KWin::DrmCommitThread::DrmCommitThread(KWin::DrmGpu*, QString const&amp;)::{lambda()#1}&gt;(KWin::DrmCommitThread::DrmCommitThread(KWin::DrmGpu*, QString const&amp;)::{lambda()#1}&amp;&amp;)::{lambda((auto:1&amp;&amp;)...)#1}&gt; &gt;, void&gt; &gt;::_M_invoke(std::_Any_data const&amp;) () from /nix/store/nzv4dr42v1fma3kyxkglnch1g1p31wf8-kwin-6.2.5/lib/libkwin.so.6
#3  0x00007f0c94551c79 in std::__future_base::_State_baseV2::_M_do_set(std::function&lt;std::unique_ptr&lt;std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter&gt; ()&gt;*, bool*) () from /nix/store/nzv4dr42v1fma3kyxkglnch1g1p31wf8-kwin-6.2.5/lib/libkwin.so.6
#4  0x00007f0c9069dc1f in __pthread_once_slow () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#5  0x00007f0c9454e35a in std::__future_base::_Deferred_state&lt;std::thread::_Invoker&lt;std::tuple&lt;QThread::create&lt;KWin::DrmCommitThread::DrmCommitThread(KWin::DrmGpu*, QString const&amp;)::{lambda()#1}&gt;(KWin::DrmCommitThread::DrmCommitThread(KWin::DrmGpu*, QString const&amp;)::{lambda()#1}&amp;&amp;)::{lambda((auto:1&amp;&amp;)...)#1}&gt; &gt;, void&gt;::_M_complete_async() () from /nix/store/nzv4dr42v1fma3kyxkglnch1g1p31wf8-kwin-6.2.5/lib/libkwin.so.6
#6  0x00007f0c90eb31b6 in QThreadCreateThread::run() () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#7  0x00007f0c90f50961 in QThreadPrivate::start(void*) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#8  0x00007f0c90698af3 in start_thread () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#9  0x00007f0c90717f4c in __clone3 () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6

Thread 6 (Thread 0x7f0c5206d6c0 (LWP 1673)):
#0  0x00007f0c9069513e in __futex_abstimed_wait_common () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#1  0x00007f0c90697c90 in pthread_cond_wait@@GLIBC_2.3.2 () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#2  0x00007f0c9455164f in std::_Function_handler&lt;std::unique_ptr&lt;std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter&gt; (), std::__future_base::_Task_setter&lt;std::unique_ptr&lt;std::__future_base::_Result&lt;void&gt;, std::__future_base::_Result_base::_Deleter&gt;, std::thread::_Invoker&lt;std::tuple&lt;QThread::create&lt;KWin::DrmCommitThread::DrmCommitThread(KWin::DrmGpu*, QString const&amp;)::{lambda()#1}&gt;(KWin::DrmCommitThread::DrmCommitThread(KWin::DrmGpu*, QString const&amp;)::{lambda()#1}&amp;&amp;)::{lambda((auto:1&amp;&amp;)...)#1}&gt; &gt;, void&gt; &gt;::_M_invoke(std::_Any_data const&amp;) () from /nix/store/nzv4dr42v1fma3kyxkglnch1g1p31wf8-kwin-6.2.5/lib/libkwin.so.6
#3  0x00007f0c94551c79 in std::__future_base::_State_baseV2::_M_do_set(std::function&lt;std::unique_ptr&lt;std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter&gt; ()&gt;*, bool*) () from /nix/store/nzv4dr42v1fma3kyxkglnch1g1p31wf8-kwin-6.2.5/lib/libkwin.so.6
#4  0x00007f0c9069dc1f in __pthread_once_slow () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#5  0x00007f0c9454e35a in std::__future_base::_Deferred_state&lt;std::thread::_Invoker&lt;std::tuple&lt;QThread::create&lt;KWin::DrmCommitThread::DrmCommitThread(KWin::DrmGpu*, QString const&amp;)::{lambda()#1}&gt;(KWin::DrmCommitThread::DrmCommitThread(KWin::DrmGpu*, QString const&amp;)::{lambda()#1}&amp;&amp;)::{lambda((auto:1&amp;&amp;)...)#1}&gt; &gt;, void&gt;::_M_complete_async() () from /nix/store/nzv4dr42v1fma3kyxkglnch1g1p31wf8-kwin-6.2.5/lib/libkwin.so.6
#6  0x00007f0c90eb31b6 in QThreadCreateThread::run() () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#7  0x00007f0c90f50961 in QThreadPrivate::start(void*) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#8  0x00007f0c90698af3 in start_thread () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#9  0x00007f0c90717f4c in __clone3 () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6

Thread 5 (Thread 0x7f0c6bfff6c0 (LWP 1641)):
#0  0x00007f0c9070a256 in ppoll () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#1  0x00007f0c8ff2e763 in g_main_context_iterate_unlocked.isra () from /nix/store/mjzgvv9cqi991q02v69jnm33y0adykmh-glib-2.82.1/lib/libglib-2.0.so.0
#2  0x00007f0c8ff2ee9c in g_main_context_iteration () from /nix/store/mjzgvv9cqi991q02v69jnm33y0adykmh-glib-2.82.1/lib/libglib-2.0.so.0
#3  0x00007f0c9107cb90 in QEventDispatcherGlib::processEvents(QFlags&lt;QEventLoop::ProcessEventsFlag&gt;) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#4  0x00007f0c90da33bb in QEventLoop::exec(QFlags&lt;QEventLoop::ProcessEventsFlag&gt;) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#5  0x00007f0c90eb2cb0 in QThread::exec() () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#6  0x00007f0c90f50961 in QThreadPrivate::start(void*) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#7  0x00007f0c90698af3 in start_thread () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#8  0x00007f0c90717f4c in __clone3 () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6

Thread 4 (Thread 0x7f0c6b6386c0 (LWP 1658)):
#0  0x00007f0c9070a256 in ppoll () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#1  0x00007f0c8ff2e763 in g_main_context_iterate_unlocked.isra () from /nix/store/mjzgvv9cqi991q02v69jnm33y0adykmh-glib-2.82.1/lib/libglib-2.0.so.0
#2  0x00007f0c8ff2ee9c in g_main_context_iteration () from /nix/store/mjzgvv9cqi991q02v69jnm33y0adykmh-glib-2.82.1/lib/libglib-2.0.so.0
#3  0x00007f0c9107cb90 in QEventDispatcherGlib::processEvents(QFlags&lt;QEventLoop::ProcessEventsFlag&gt;) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#4  0x00007f0c90da33bb in QEventLoop::exec(QFlags&lt;QEventLoop::ProcessEventsFlag&gt;) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#5  0x00007f0c90eb2cb0 in QThread::exec() () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#6  0x00007f0c90f50961 in QThreadPrivate::start(void*) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#7  0x00007f0c90698af3 in start_thread () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#8  0x00007f0c90717f4c in __clone3 () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6

Thread 3 (Thread 0x7f0c5186c6c0 (LWP 1674)):
#0  0x00007f0c906e2435 in clock_nanosleep@GLIBC_2.2.5 () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#1  0x00007f0c906ed4c7 in nanosleep () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#2  0x00007f0c94551716 in std::_Function_handler&lt;std::unique_ptr&lt;std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter&gt; (), std::__future_base::_Task_setter&lt;std::unique_ptr&lt;std::__future_base::_Result&lt;void&gt;, std::__future_base::_Result_base::_Deleter&gt;, std::thread::_Invoker&lt;std::tuple&lt;QThread::create&lt;KWin::DrmCommitThread::DrmCommitThread(KWin::DrmGpu*, QString const&amp;)::{lambda()#1}&gt;(KWin::DrmCommitThread::DrmCommitThread(KWin::DrmGpu*, QString const&amp;)::{lambda()#1}&amp;&amp;)::{lambda((auto:1&amp;&amp;)...)#1}&gt; &gt;, void&gt; &gt;::_M_invoke(std::_Any_data const&amp;) () from /nix/store/nzv4dr42v1fma3kyxkglnch1g1p31wf8-kwin-6.2.5/lib/libkwin.so.6
#3  0x00007f0c94551c79 in std::__future_base::_State_baseV2::_M_do_set(std::function&lt;std::unique_ptr&lt;std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter&gt; ()&gt;*, bool*) () from /nix/store/nzv4dr42v1fma3kyxkglnch1g1p31wf8-kwin-6.2.5/lib/libkwin.so.6
#4  0x00007f0c9069dc1f in __pthread_once_slow () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#5  0x00007f0c9454e35a in std::__future_base::_Deferred_state&lt;std::thread::_Invoker&lt;std::tuple&lt;QThread::create&lt;KWin::DrmCommitThread::DrmCommitThread(KWin::DrmGpu*, QString const&amp;)::{lambda()#1}&gt;(KWin::DrmCommitThread::DrmCommitThread(KWin::DrmGpu*, QString const&amp;)::{lambda()#1}&amp;&amp;)::{lambda((auto:1&amp;&amp;)...)#1}&gt; &gt;, void&gt;::_M_complete_async() () from /nix/store/nzv4dr42v1fma3kyxkglnch1g1p31wf8-kwin-6.2.5/lib/libkwin.so.6
#6  0x00007f0c90eb31b6 in QThreadCreateThread::run() () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#7  0x00007f0c90f50961 in QThreadPrivate::start(void*) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#8  0x00007f0c90698af3 in start_thread () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#9  0x00007f0c90717f4c in __clone3 () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6

Thread 2 (Thread 0x7f0c715ff6c0 (LWP 1622)):
#0  0x00007f0c9070a256 in ppoll () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#1  0x00007f0c8ff2e763 in g_main_context_iterate_unlocked.isra () from /nix/store/mjzgvv9cqi991q02v69jnm33y0adykmh-glib-2.82.1/lib/libglib-2.0.so.0
#2  0x00007f0c8ff2ee9c in g_main_context_iteration () from /nix/store/mjzgvv9cqi991q02v69jnm33y0adykmh-glib-2.82.1/lib/libglib-2.0.so.0
#3  0x00007f0c9107cb90 in QEventDispatcherGlib::processEvents(QFlags&lt;QEventLoop::ProcessEventsFlag&gt;) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#4  0x00007f0c90da33bb in QEventLoop::exec(QFlags&lt;QEventLoop::ProcessEventsFlag&gt;) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#5  0x00007f0c90eb2cb0 in QThread::exec() () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#6  0x00007f0c91f8ba6e in QDBusConnectionManager::run() () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6DBus.so.6
#7  0x00007f0c90f50961 in QThreadPrivate::start(void*) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#8  0x00007f0c90698af3 in start_thread () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6
#9  0x00007f0c90717f4c in __clone3 () from /nix/store/maxa3xhmxggrc5v2vc0c3pjb79hjlkp9-glibc-2.40-66/lib/libc.so.6

Thread 1 (Thread 0x7f0c7f43b080 (LWP 1609)):
[KCrash Handler]
#4  0x00007f0c9456fb99 in KWin::DrmGpu::pageFlipHandler(int, unsigned int, unsigned int, unsigned int, unsigned int, void*) () from /nix/store/nzv4dr42v1fma3kyxkglnch1g1p31wf8-kwin-6.2.5/lib/libkwin.so.6
#5  0x00007f0c904bf217 in drmHandleEvent () from /nix/store/0igca315wbpzgkmlfsgl08bms8y82q3y-libdrm-2.4.123/lib/libdrm.so.2
#6  0x00007f0c9456f038 in KWin::DrmGpu::dispatchEvents() () from /nix/store/nzv4dr42v1fma3kyxkglnch1g1p31wf8-kwin-6.2.5/lib/libkwin.so.6
#7  0x00007f0c90df93ab in void doActivate&lt;false&gt;(QObject*, int, void**) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#8  0x00007f0c90e07b73 in QSocketNotifier::activated(QSocketDescriptor, QSocketNotifier::Type, QSocketNotifier::QPrivateSignal) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#9  0x00007f0c90e083f5 in QSocketNotifier::event(QEvent*) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#10 0x00007f0c923a0ee9 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Widgets.so.6
#11 0x00007f0c90d96648 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#12 0x00007f0c90f52bee in QEventDispatcherUNIXPrivate::activateSocketNotifiers() () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#13 0x00007f0c90f53351 in QEventDispatcherUNIX::processEvents(QFlags&lt;QEventLoop::ProcessEventsFlag&gt;) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#14 0x00007f0c91b5dc41 in ?? () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Gui.so.6
#15 0x00007f0c90da33bb in QEventLoop::exec(QFlags&lt;QEventLoop::ProcessEventsFlag&gt;) () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#16 0x00007f0c90d9e8b6 in QCoreApplication::exec() () from /nix/store/w41bq7wcswn7wb6vddkj8i2g1c64rciv-qtbase-6.8.2/lib/libQt6Core.so.6
#17 0x000000000044753c in main ()

Reported using DrKonqi</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2416176</commentid>
    <comment_count>1</comment_count>
    <who name="">duha.bugs</who>
    <bug_when>2025-04-15 18:09:41 +0000</bug_when>
    <thetext>This is fixed with Kwin 6.3.4

*** This bug has been marked as a duplicate of bug 496015 ***</thetext>
  </long_desc>
      
      

    </bug>

</bugzilla>