[Bug 102423] kwin segfaults when Alt+Tabbing with windows thumbnails on AMDGPU

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=102423

Timothy Arceri  changed:

   What|Removed |Added

 Resolution|--- |NOTOURBUG
 Status|NEEDINFO|RESOLVED

--- Comment #7 from Timothy Arceri  ---
Closing as per comment 6.

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[Bug 102423] kwin segfaults when Alt+Tabbing with windows thumbnails on AMDGPU

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=102423

--- Comment #6 from pmarget...@gmail.com ---
Plasma updated to 5.12 today, and I no longer can reproduce this bug. I guess
this was on their end afterall.

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[Bug 102423] kwin segfaults when Alt+Tabbing with windows thumbnails on AMDGPU

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https://bugs.freedesktop.org/show_bug.cgi?id=102423

--- Comment #5 from Alex Deucher  ---
amdgpu is the kernel driver and radeonsi is the user mode mesa driver.  They
both work together on your system.

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[Bug 102423] kwin segfaults when Alt+Tabbing with windows thumbnails on AMDGPU

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=102423

--- Comment #4 from pmarget...@gmail.com ---
Created attachment 137109
  --> https://bugs.freedesktop.org/attachment.cgi?id=137109=edit
backtrace kwin alt-tab thumbnails AMDGPU

Kwin segfaults when alt-tabbing with "thumbnails" selected. I wanted to file a
bug report against AMDGPU driver, but search shows exactly the same problem
with radeonsi, so I'm adding to this bug report. If you think I should open a
new bug against AMDGPU, let me know please.

AMD Rx560 using AMDGPU with DC=1 on linux 4.15.0
Xorg: 1.19.6+13+gd0d1a694f-1
xf86-video-amdgpu: 1.4.0-1
kwin: 5.11.95-1
mesa: 17.3.3-2

Filed a bug with KDE: https://bugs.kde.org/show_bug.cgi?id=389593
They told me it's a driver crash and sent me here.

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[Bug 102423] kwin segfaults when Alt+Tabbing with windows thumbnails on AMDGPU

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=102423

Henry Hu  changed:

   What|Removed |Added

 CC||henry.hu...@gmail.com

--- Comment #3 from Henry Hu  ---
I also reported a similar bug to KDE:
https://bugs.kde.org/show_bug.cgi?id=384901
and they sent me upstream.

The backtrace is very similar. On the other hand, I am using the r600 dri
module.
It crashes every time I do alt+tab. I'll try to build with debug.

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[Bug 102423] kwin segfaults when Alt+Tabbing with windows thumbnails on AMDGPU

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https://bugs.freedesktop.org/show_bug.cgi?id=102423

--- Comment #2 from leguen.yann...@gmail.com ---
How can I provide such debugging symbols?

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[Bug 102423] kwin segfaults when Alt+Tabbing with windows thumbnails on AMDGPU

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=102423

Michel Dänzer  changed:

   What|Removed |Added

 Status|NEW |NEEDINFO

--- Comment #1 from Michel Dänzer  ---
Nothing can be done about this without debugging symbols being available for
/usr/lib/xorg/modules/dri/radeonsi_dri.so in the backtrace.

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[Bug 102423] kwin segfaults when Alt+Tabbing with windows thumbnails on AMDGPU

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=102423

leguen.yann...@gmail.com changed:

   What|Removed |Added

 OS|All |Linux (All)
   Hardware|Other   |x86-64 (AMD64)

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[Bug 102423] kwin segfaults when Alt+Tabbing with windows thumbnails on AMDGPU

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=102423

Bug ID: 102423
   Summary: kwin segfaults when Alt+Tabbing with windows
thumbnails on AMDGPU
   Product: Mesa
   Version: 17.1
  Hardware: Other
OS: All
Status: NEW
  Severity: normal
  Priority: medium
 Component: Drivers/Gallium/radeonsi
  Assignee: dri-devel@lists.freedesktop.org
  Reporter: leguen.yann...@gmail.com
QA Contact: dri-devel@lists.freedesktop.org

Created attachment 133806
  --> https://bugs.freedesktop.org/attachment.cgi?id=133806=edit
Backtrace of the kwin crash

I use an AMD RX560 with Mesa 17.1.7 and Plasma 5.10.5 (ArchLinux).

When I use the "thumbnails" Alt+Tab style for kwin, sooner or later kwin will
segfault while alt+tabbing.
Without windows thumbnails, everything works ok.

I reported this bug on the KDE bugtracker already :
https://bugs.kde.org/show_bug.cgi?id=383058

But the crash seems to come from the driver.
It happened with previous Mesa 17.1 versions too.

See the backtrace in attachment.

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