Nouveau - Sep 2012 - [Bug 55294] New: Running EGL demos on DRM from mesa-demos causes a corrupted output on NV50

https://bugs.freedesktop.org/show_bug.cgi?id=55294

          Priority: medium
            Bug ID: 55294
          Assignee: nouveau at lists.freedesktop.org
           Summary: Running EGL demos on DRM from mesa-demos causes a
                    corrupted output on NV50
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: lubosz at gmail.com
          Hardware: Other
            Status: NEW
           Version: git
         Component: Driver/nouveau
           Product: xorg

Created attachment 67649
  --> https://bugs.freedesktop.org/attachment.cgi?id=67649&action=edit
kernel log with nouveau.reg_debug=0x600

When I try to run the mesa demos on the EGL/DRM backend I get a corrupted
screen. 

You can find the demos here:
http://cgit.freedesktop.org/mesa/demos/tree/src/egl/opengl

The binaries for the EGL/DRM backend have a "_screen" suffix.
The demos are using eglut with the eglut_screen/drm backend.

The following kernel errors are printed:
[drm] nouveau 0000:01:00.0: EvoCh 0 Mthd 0x086c Data 0x00005564 (0x0084 0x04)
[drm] nouveau 0000:01:00.0: EvoCh 1 Mthd 0x080c Data 0x00005564 (0x0084 0x04)

You can find a screenshot and an kernel log with the
"nouveau.reg_debug=0x600"
flag in the attachment.

Kernel 3.6.0 RC5 on NV50.

A similar kernel error can be found in this bug:
https://bugs.freedesktop.org/show_bug.cgi?id=27483

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--- Comment #1 from Lubosz Sarnecki <lubosz at gmail.com> ---
Created attachment 67650
  --> https://bugs.freedesktop.org/attachment.cgi?id=67650&action=edit
Photograph of corrupted output

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--- Comment #2 from Lubosz Sarnecki <lubosz at gmail.com> ---
joi on the irc figured out that it has to do with the resolution I am trying to
set (1366 x 768).

With his patch on the demos http://bpaste.net/show/47560/ I was able to set a
1280 x 768 resolution successfully.

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--- Comment #3 from Lubosz Sarnecki <lubosz at gmail.com> ---
Created attachment 67694
  --> https://bugs.freedesktop.org/attachment.cgi?id=67694&action=edit
demo log with verbose egl flags

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--- Comment #4 from Marcin Slusarz <marcin.slusarz at gmail.com> ---
Created attachment 67841
  --> https://bugs.freedesktop.org/attachment.cgi?id=67841&action=edit
fix

This patch should do the trick.

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--- Comment #5 from Lubosz Sarnecki <lubosz at gmail.com> ---
Thank you very much for the patch. With the patched mesa I could successfully
run the eglut demos with my native resolution on linux 3.6.0 rc7.

Should this be a mesa / gallium bug then?

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Marcin Slusarz <marcin.slusarz at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         QA Contact|xorg-team at lists.x.org       |
            Product|xorg                        |Mesa
          Component|Driver/nouveau              |Drivers/DRI/nouveau

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Marcin Slusarz <marcin.slusarz at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #67841|0                           |1
        is obsolete|                            |

--- Comment #6 from Marcin Slusarz <marcin.slusarz at gmail.com> ---
Created attachment 67956
  --> https://bugs.freedesktop.org/attachment.cgi?id=67956&action=edit
fix v2

Yes. This is Mesa-side bug. I've changed product/component.

After closer look, I came to a conclusion that my patch was not quite correct.
Please test the new one (although I managed to reproduced this issue and both
patches fix it).

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Emil Velikov <emil.l.velikov at gmail.com> changed:

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

--- Comment #7 from Emil Velikov <emil.l.velikov at gmail.com> ---
The patch has been pushed upstream
master 93eba269351c6e256db3a4cc7c7018f5a3fae5a1

Please reopen if the issue persist

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