[Bug 74927] Screen corruption on Ubuntu 14.04, Kernel 3.13 with Radeon R7 240 (OLAND PRO)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=74927

--- Comment #4 from Alex Deucher <agd5f at yahoo.com> ---
Make sure your kernel has this patch:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=227ae10f17a5f2fd1307b7e582b603ef7bbb7e97

You can also try disabling tiling in your xorg config:

Section "Device"
    Identifier "Radeon"
    Driver "radeon"
    Option "ColorTiling" "true"
    Option "ColorTiling2D" "true"
EndSection

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