Nouveau - Feb 2014 - [Bug 74485] New: [NVE6] system hangs with 3D applications

https://bugs.freedesktop.org/show_bug.cgi?id=74485

          Priority: medium
            Bug ID: 74485
          Assignee: nouveau at lists.freedesktop.org
           Summary: [NVE6] system hangs with 3D applications
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: prg at cooco.de
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Drivers/DRI/nouveau
           Product: Mesa

Created attachment 93330
  --> https://bugs.freedesktop.org/attachment.cgi?id=93330&action=edit
dmesg of the hang

Kernel 3.13.1, mesa git from 2014-02-01 (10.1.0-devel (git-dc00ec1))
Non-composited KDE desktop

System randomly hangs when using 3D applications, tried with Half Life 2,
Dota2, some older games with wine. The hang might happen right when entering
the game or maybe after a few minutes of playing. Just running glxgears works
for quite some time (>35min).

Bug #72180 suggests that using blob fw fixes random lockups, but it doesn't
help in my case. Frequency of hangs seems to be about the same with and without
blob fw.

Bug #63165 reports display corruption which i haven't seen yet and has quite
different error messages in the logs.

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https://bugs.freedesktop.org/show_bug.cgi?id=74485

--- Comment #1 from prg at cooco.de ---
Created attachment 93331
  --> https://bugs.freedesktop.org/attachment.cgi?id=93331&action=edit
dmesg of CPU stall

"INFO: rcu_sched self-detected stall on CPU { 0}" also happens
sometimes

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https://bugs.freedesktop.org/show_bug.cgi?id=74485

--- Comment #2 from prg at cooco.de ---
Created attachment 93959
  --> https://bugs.freedesktop.org/attachment.cgi?id=93959&action=edit
workaround for the issue

calim on #nouveau suggested this workaround which seems to disable some kind of
compression or something. I've tested for a few days and indeed I
haven't heard
from this PLTCG thing anymore since applying that patch. The previously
mentioned games are perfectly usable now.

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https://bugs.freedesktop.org/show_bug.cgi?id=74485

prg at cooco.de changed:

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

--- Comment #3 from prg at cooco.de ---
Can't reproduce anymore with kernel 3.17-rc1, nouveau from
git://people.freedesktop.org/~darktama/nouveau at commit 351a08b and mesa
10.4.0-devel (git-8d8a5eb)

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