https://bugs.kde.org/show_bug.cgi?id=499657
Bug ID: 499657
Summary: Kwin crashes on Alt+tab from fullscreen games
Classification: Plasma
Product: kwin
Version: 6.2.5
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Keywords: drkonqi
Severity: crash
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: gunnertil...@gmail.com
Target Milestone: ---
Application: kwin_wayland (6.2.5)
ApplicationNotResponding [ANR]: false
Qt Version: 6.8.1
Frameworks Version: 6.10.0
Operating System: Linux 6.12.11-200.fc41.x86_64 x86_64
Windowing System: Wayland
Distribution: "Fedora Linux 41 (KDE Plasma)"
DrKonqi: 6.2.5 [CoredumpBackend]
-- Information about the crash:
This has been a recurring issue for me, and I seriously cant find anything
wrong with my system. Any fullscreen game (WINE, Proton, and native) will on
occasion crash when alt+tab-ing out of the game. I can't consistanly remake the
crash, but it always happens under the same conditions: I have a fullscreen
game open >> I press alt+tab to focus another window >> ~10% chance Kwin
crashes. In this perticular case I was running Soulframe via Proton with
Lutris, but this has happend to me with Warframe and Cyberpunk 2077 under
Proton (various version including GE) though steam, and Minecraft natively as
well. Generally, using borderless-fullscreen is a functional workaround, but is
not ideal in some scenerios. I have run memtest86 and passed.
The crash can be reproduced sometimes.
-- Backtrace (Reduced):
#5 0x00007fdecd40191c in simple_mtx_lock (mtx=0x7fde64bc59a4) at
../src/util/simple_mtx.h:106
#6 _mesa_lock_debug_state (ctx=ctx@entry=0x7fde64b02010) at
../src/mesa/main/debug_output.c:770
#7 0x00007fdecd4025b0 in _mesa_log_msg (ctx=0x7fde64b02010,
source=MESA_DEBUG_SOURCE_SHADER_COMPILER, type=MESA_DEBUG_TYPE_OTHER, id=1,
severity=MESA_DEBUG_SEVERITY_NOTIFICATION, len=270, buf=0x7fdebf7f9970 "Shader
Stats: SGPRS: 64 VGPRS: 28 Code Size: 2012 LDS: 0 Scratch: 0 Max Waves: 16
Spilled SGPRs: 0 Spilled VGPRs: 0 PrivMem VGPRs: 0 LSOutputs: 0 HSOutputs: 0
HSPatchOuts: 0 ESOutputs: 0 GSOutputs: 0 "...) at
../src/mesa/main/debug_output.c:948
#8 0x00007fdecd466791 in _mesa_gl_vdebugf (ctx=0x7fde64b02010,
id=0x7fdecfc9a01c <id>, source=MESA_DEBUG_SOURCE_SHADER_COMPILER,
type=MESA_DEBUG_TYPE_OTHER, severity=MESA_DEBUG_SEVERITY_NOTIFICATION,
fmtString=0x7fdeced3a810 "Shader Stats: SGPRS: %d VGPRS: %d Code Size: %d LDS:
%d Scratch: %d Max Waves: %d Spilled SGPRs: %d Spilled VGPRs: %d PrivMem VGPRs:
%d LSOutputs: %u HSOutputs: %u HSPatchOuts: %u ESOutputs: %u GSOutp"...,
args=0x7fdebf7fa9e0) at ../src/mesa/main/errors.c:171
#9 0x00007fdecd401748 in _debug_message (data=<optimized out>, id=<optimized
out>, ptype=<optimized out>, fmt=<optimized out>, args=<optimized out>) at
../src/mesa/main/debug_output.c:739
Reported using DrKonqi
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