Nouveau - Jun 2014 - [Bug 79946] New: Segmentation violation at nouveau_fence.c

https://bugs.freedesktop.org/show_bug.cgi?id=79946

          Priority: medium
            Bug ID: 79946
          Assignee: nouveau at lists.freedesktop.org
           Summary: Segmentation violation at nouveau_fence.c
          Severity: minor
    Classification: Unclassified
                OS: Linux (All)
          Reporter: zeccav at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: 10.1
         Component: Drivers/DRI/nouveau
           Product: Mesa

On mesa-20140509
Chipset C51 (NV4E)
Family NV40 Video card NVIDIA GeForce 6150 LE
Running ~/intel/ism/bin/intel64/intelremotedialog
from Intel VTune Amplifier XE 2013 command amplxe-gui on Linux Fedora 20.

Segmentation violation at nouveau_fence.c:226
"if (screen->fence.current->state <
NOUVEAU_FENCE_STATE_EMITTING)"
pointer screen is nil because after nv30/nv30_context.c:44
"nv30 = container_of(push->user_priv, nv30, bufctx);"
assert(nv30->screen) fails.

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--- Comment #1 from Vittorio <zeccav at gmail.com> ---
I get the same bug running glxinfo and glxinfo64.
I hope this helps reproducing the bug.

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Maarten Lankhorst <bugs at mblankhorst.nl> changed:

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

--- Comment #2 from Maarten Lankhorst <bugs at mblankhorst.nl> ---


*** This bug has been marked as a duplicate of bug 79823 ***

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Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|DUPLICATE                   |---

--- Comment #3 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Actually this unlikely to be a duplicate of that bug. This bug might be
resolved by

http://cgit.freedesktop.org/mesa/mesa/commit/?id=c092c46b27c6f6a6674e8d67fb3afdb684811819

But I'm not 100% sure... mind trying it out?

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Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Segmentation violation at   |[NV30/Gallium] Segmentation
                   |nouveau_fence.c             |violation at
                   |                            |nouveau_fence.c

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--- Comment #4 from Vittorio <zeccav at gmail.com> ---
You may be 100% sure now:I tried your patch and it fixes my problem, both the
original one and with glxinfo.
Keep up the good work!

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Ilia Mirkin <imirkin at alum.mit.edu> changed:

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

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