[Bug 107204] GPU hang (ring gfx timeout) in OpenGL game

[Bug 107204] GPU hang (ring gfx timeout) in OpenGL game

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=107204

            Bug ID: 107204
           Summary: GPU hang (ring gfx timeout) in OpenGL game
           Product: Mesa
           Version: git
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: fbz-me@milek7.pl
        QA Contact: dri-devel@lists.freedesktop.org

Created attachment 140587
  --> https://bugs.freedesktop.org/attachment.cgi?id=140587&action=edit
Dumps from GALLIUM_DDEBUG

It hangs in OpenGL game immediately after startup almost always (but sometimes
it goes through and works) with dmesg message:
>[drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx timeout, last signaled seq=3324, last emitted seq=3327

I tested it on Radeon RX580, mainline kernel 4.18, Mesa 18.1.3 and Mesa git
c0874947f1.

I could provide game code for testing but I would have to package minimal
assets as full game weights pretty much.

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[Bug 107204] GPU hang (ring gfx timeout) with out of bounds UBO read in shader

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https://bugs.freedesktop.org/show_bug.cgi?id=107204

Miłosz Rachwał <fbz-me@milek7.pl> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|GPU hang (ring gfx timeout) |GPU hang (ring gfx timeout)
                   |in OpenGL game              |with out of bounds UBO read
                   |                            |in shader

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[Bug 107204] GPU hang (ring gfx timeout) with out of bounds UBO read in shader

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https://bugs.freedesktop.org/show_bug.cgi?id=107204

--- Comment #1 from Miłosz Rachwał <fbz-me@milek7.pl> ---
It turned out that the cause was uninitialized UBO, which depending on memory
contents leaded to out of bounds UBO array read in fragment shader.
It probably shouldn't bring down whole GPU, though.

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[Bug 107204] GPU hang (ring gfx timeout) with out of bounds UBO read in shader

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https://bugs.freedesktop.org/show_bug.cgi?id=107204

GitLab Migration User <gitlab-migration@fdo.invalid> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |MOVED
             Status|NEW                         |RESOLVED

--- Comment #2 from GitLab Migration User <gitlab-migration@fdo.invalid> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/1320.

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