[Bug 101597] [BAT][PNV] pipe [AB] vblank wait timed out when running igt at kms_pipe_crc_basic@hang-read-crc-pipe-a/b

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101597

Martin Peres <martin.peres at free.fr> changed:

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

--- Comment #3 from Martin Peres <martin.peres at free.fr> ---
(In reply to Maarten Lankhorst from comment #2)
> This bug only affects fi-pnv-d510, the one in farm 2 is unaffected.
> 
> I'm not sure when this was broken or if it was always broken, but the code
> needs to disable CXSR during atomic modeset enable. When cxsr is active you
> get no vblanks, which means you end up with this.
> 
> It will be fixed when converting the gen4- watermarks to atomic, the code
> properly disables cxsr there. I've tested this bug and on nightly I hit it
> all the time, while with atomic watermarks it's gone.

121 runs without failures, this seems to be fixed.

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