[Bug 57990] xf86-video-ati Causes black stripes (RadeonHD4890 - r770)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=57990

--- Comment #17 from Alex Deucher <agd5f at yahoo.com> ---
(In reply to comment #16)
> The older version was the version that comes installed with Ubuntu 12.04 by
> default (don't know how to see it). I can't disable ColorTiling2D because I
> don't have xorg.conf file in my folder and ColorTiling2D is important to
> improve performance as I have seen, driver should work with that enabled.

We need to narrow down where the problem is so you need to try some things so
we can figure out what's going on.  You can create a xorg.conf to test with
easily.  Just create /etc/X11/xorg.conf with the following content:

Section "Device"
    Identifier "radeon"
    Driver "radeon"
    Option "ColorTiling2D" "false"
EndSection

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