Bug 2362072

Summary: kwin_wayland crashes after upgrade to fedora 42 on Lenovo ThinkPad P14s Gen 5 with intel ARC graphics
Product: [Fedora] Fedora Reporter: Vincent Schut <schut>
Component: qt6-qtbaseAssignee: Jan Grulich <jgrulich>
Status: NEW --- QA Contact:
Severity: urgent Docs Contact:
Priority: unspecified    
Version: 42CC: jgrulich, kde-sig, mpearson, ngompa13, rdieter, suraj.ghimire7, than
Target Milestone: ---Keywords: Desktop
Target Release: ---   
Hardware: x86_64   
OS: Linux   
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stack trace from journald none

Description Vincent Schut 2025-04-24 15:23:43 UTC
After upgrading from F41 to F42, kwin_wayland crashes. Downgrading kwin from kwin-6.3.4-3.fc42 to kwin-6.3.4-1.fc42 fixes the issue.

Fedora system is up-to-date.

Kernel: 6.14.3-300.fc42.x86_64 #1 SMP PREEMPT_DYNAMIC Sun Apr 20 16:08:39 UTC 2025 x86_64 GNU/Linux

Hardware:
Lenovo ThinkPad P14s Gen 5

Graphics:
inxi -G
Graphics:
  Device-1: Intel Meteor Lake-P [Intel Arc Graphics] driver: i915 v: kernel
  Device-2: Chicony Integrated Camera driver: uvcvideo type: USB
  Display: wayland server: X.org v: 1.21.1.16 with: Xwayland v: 24.1.6
    compositor: kwin_wayland driver: X: loaded: modesetting unloaded: fbdev,vesa
    dri: nouveau,i965 gpu: i915 resolution: 1: 3840x2160~60Hz
    2: 3072x1920~120Hz
  API: EGL v: 1.5 drivers: iris,swrast
    platforms: gbm,wayland,x11,surfaceless,device
  API: OpenGL v: 4.6 compat-v: 4.5 vendor: intel mesa v: 25.0.2
    renderer: Mesa Intel Arc Graphics (MTL)
  API: Vulkan v: 1.4.309 drivers: N/A surfaces: xcb,xlib,wayland
  Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo
    de: kscreen-console,kscreen-doctor wl: wayland-info x11: xdriinfo,
    xdpyinfo, xprop, xrandr

Will attach the stack trace from journal.

Reproducible: Always

Steps to Reproduce:
1. upgrade to F42 (so kwin-6.3.4-3.fc42 is installed)
2. reboot
3. no graphical login, kwin_wayland crash in the logs.
Actual Results:
kwin crashing

Expected Results:
kwin starting, graphical login screen appearing.

Comment 1 Vincent Schut 2025-04-24 15:25:42 UTC
Created attachment 2087043 [details]
stack trace from journald

Comment 2 Neal Gompa 2025-04-29 20:30:00 UTC
This is an issue in Qt, reassigning.

Comment 3 Mark Pearson 2025-04-30 02:30:48 UTC
Tested on T14s G5 (don't have a P14s I'm afraid - but it's the same MTL device). My system has a different panel (2880x1800~120Hz)
Mine is from a fresh install, not an upgrade. Not seeing any issues - system is working nicely

From the above I see nouveau is being used - does the system have an Nvidia card? Anything interesting in the kernel logs related to that? The nouveau driver is in much better shape than it used to be...but still has issues.

Mark

Comment 4 Jan Grulich 2025-04-30 05:52:08 UTC
Can you verify this issue is gone with https://bodhi.fedoraproject.org/updates/FEDORA-2025-3bacbc7a04?

Comment 5 Vincent Schut 2025-04-30 08:14:07 UTC
(In reply to Jan Grulich from comment #4)
> Can you verify this issue is gone with
> https://bodhi.fedoraproject.org/updates/FEDORA-2025-3bacbc7a04?

Yes, it works now. Thanks for the fix!