[Bug 81973] xf86-video-intel-2.99.912 and newer causing flickering on game.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81973

--- Comment #14 from kirk <kirkpuppy at gmail.com> ---
I checked to see if first bad/last good commit from my previous bisect still
applied to this problem and it does not. I guess I should have opened a new
bug. Anyway I did another bisect and it gives me this:

# git bisect good
49e72bd4e59085aa940e5af63381c5394ee670ad is the first bad commit
commit 49e72bd4e59085aa940e5af63381c5394ee670ad
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Tue Apr 15 11:24:10 2014 +0100

    sna: Discard TearFree readback when overdrawing

    References: https://bugs.freedesktop.org/show_bug.cgi?id=77436
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

:040000 040000 26d635f471981c81ebacb252b1d4593e73094923
ed01b4b2fe76e4eb0e2912fe4ce264b061e8cf47 M    src
# 

I couldn't revert that patch, but I could switch to UXA which does fix the
problem for .914 with or without TearFree. UXA also fixes the problem I had
with the game, with or without TearFree. I thought I had tested that before,
guess I messed that up. For a Linux distribution should UXA be the default? Or
is SNA needed for the newer chip sets?

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