Bug 394656 - [wayland] KWin crashes in EglGbm backend when attaching an external monitor with MESA/amdgpu
Summary: [wayland] KWin crashes in EglGbm backend when attaching an external monitor w...
Status: RESOLVED WORKSFORME
Alias: None
Product: kwin
Classification: Plasma
Component: platform-drm (show other bugs)
Version: 5.12.5
Platform: Neon Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-05-24 18:42 UTC by Erin Yuki Schlarb
Modified: 2021-11-07 18:22 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:

Attachments
sudo sh -c 'gdb --pid "$(pidof kwin_wayland)" --eval-command="continue" --eval-command="thread apply all backtrace full" --eval-command="quit" 2>&1 | tee /home/alexander/kwin2.log' (66.17 KB, text/plain)
2018-05-24 18:42 UTC, Erin Yuki Schlarb 		Details
View All Add an attachment

Note You need to log in before you can comment on or make changes to this bug.
Description Erin Yuki Schlarb 2018-05-24 18:42:23 UTC 
Created attachment 112855 [details]
sudo sh -c 'gdb --pid "$(pidof kwin_wayland)" --eval-command="continue" --eval-command="thread apply all backtrace full" --eval-command="quit" 2>&1 | tee /home/alexander/kwin2.log'

1) Start a Plasma session using GDM (SDDM didn't work last time I tried)
 2) Switch to another VT and log int
 3) Attach debugger to the `kwin_wayland` process
 4) Switch back to KDE Plasma
 5) Attach an external monitor using HDMI

Platform:
 - Device: Lenovo ideapad Y700-ACZ (Laptop)
 - GPU: Radeon R9 M280X (BonaireXT)
 - Kernel: Linux 4.17.0-041700rc6-generic (Ubuntu kernel PPA)
   - amdgpu driver with amdgpu.dc=1
 - Userland:
   - libgbm1 18.0.4-1 (Debian unstable)
   - libdrm2 2.4.92-1 (Debian unstable)
   - libgl1-mesa-dri 10.0.4-1 (Debian unstable)
   - libqt5* 5.10.0+dfsg-2+16.04+xenial+build46 (Neon user)
   - kwin-wayland 4:5.12.5-0neon+16.04+xenial+build88 (Neon user)

Full GDB trace at time of SIGABRT is included in the attachment.
Comment 1 kde.org 2021-11-06 20:56:40 UTC 
This issue report is quite old. Can you please confirm, that it still persists with KDE 5.23?
Comment 2 Erin Yuki Schlarb 2021-11-07 18:22:41 UTC 
Not an issue with Linux 5.12.0-16.2-liquorix-amd64 and current Debian unstable anymore.