Bug ID: 99400
           Summary: [nouveau] garbled rending with glamor on G71
           Product: Mesa
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/nouveau
        QA Contact:

Created attachment 128933
Screenshot of the issue


While investigating rendering bugs on Xwayland with nouveau specifically ([1]
and [2]) I realized that some gtk2 output (this Xwayland) is completely


How reproducible:


Steps to reproduce:

1. Log in a Wayland session (either Weston or GNOME shell) on a Dell M1710 with
a GeForce Go 7950 GTX 
2. Run gtk-demo (the one from gtk2, i.e. not Wayland native but relying on
3. Start the "Assistant" demo (second starting from the top)

Actual result:

The window is black with random content

Expected result:

The rendering is correct

Additional data:

This issue does not occur when using "shm" and CPU rendering instead of glamor
in Xwayland.

I am not aware of any other hardware where glamor produces such garbled output,
so I suspect an issue with nouveau, but if you reckon it's an issue with glamor
instead, please flip this bug back to xserver/glamor

I have seen other issue with black icons being reported with glamor and nouveau
as well and these do not occur when using the CPU render in weston for example

In my case, hardware is VGA compatible controller: NVIDIA Corporation G71M
[GeForce Go 7950 GTX] (rev a1) (prog-if 00 [VGA controller])

01:00.0 0300: 10de:0297 (rev a1) (prog-if 00 [VGA controller])
        Subsystem: 1028:019b

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