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

[bugzilla-daemon at freedesktop.org]

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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