[Nouveau] [Bug 90513] New: Odd gray and red flicker in The Talos Principle on GK104

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90513

            Bug ID: 90513
           Summary: Odd gray and red flicker in The Talos Principle on
                    GK104
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: gediminas at varciai.lt
        QA Contact: nouveau at lists.freedesktop.org

When running The Talos Principle[1] on my GK104 under Nouveau, I get two kinds
of odd flickering:
· some parts of some objects flicker between being bright and less bright
· some objects flicker between being "normal" and full-red
Although, the "red" flicker does not appear if the game's graphics settings are
set to "minimum" – only the bright / less bright flicker happens.
It looks fine on proprietary drivers, which probably rules out hardware
defects. It also looks fine on an Intel GPU under Mesa.

I recorded a short video[2] in case anyone agrees that one look is better than
a thousand words and wants to see it in action.


I recorded an apitrace[3] of it. On nouveau this replays the same way it looks
"live". On proprietary drivers it replays "correctly" – the flicker is
nonexistent. I did not manage to do the reverse – sadly, an apitrace recorded
on proprietary drivers fail to replay at all regardless of what driver is used.

[1] http://store.steampowered.com/app/257510/ [a free demo version which can be
used to reproduce is also available]
[2] https://seriouss.am/video/talos-redflicker.mp4 length: 20 seconds;
filesize: 24.6 MiB
[3] https://seriouss.am/talos-nouveau-2015-05-11T1231.trace.xz filesize: 361.9
MiB

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