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

[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

            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.yannick@gmail.com
        QA Contact: dri-devel@lists.freedesktop.org

Created attachment 133806
  --> https://bugs.freedesktop.org/attachment.cgi?id=133806&action=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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[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

leguen.yannick@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

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

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
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

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

--- Comment #2 from leguen.yannick@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

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

Henry Hu <henry.hu.sh@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |henry.hu.sh@gmail.com

--- Comment #3 from Henry Hu <henry.hu.sh@gmail.com> ---
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 #4 from pmargeti34@gmail.com ---
Created attachment 137109
  --> https://bugs.freedesktop.org/attachment.cgi?id=137109&action=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

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

--- Comment #5 from Alex Deucher <alexdeucher@gmail.com> ---
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

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

--- Comment #6 from pmargeti34@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

Timothy Arceri <t_arceri@yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |NOTOURBUG
             Status|NEEDINFO                    |RESOLVED

--- Comment #7 from Timothy Arceri <t_arceri@yahoo.com.au> ---
Closing as per comment 6.

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