[Bug 29255] DisplayPort output distorted

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=29255

--- Comment #22 from James Brechtel <jbrechtel at gmail.com> 2010-09-19 06:21:19 PDT ---
Hi, I have the same problem on my Envy 14, but thanks to a tip from the helpful
folks in #radeon on FreeNode I found that if I turn off my laptop panel with
xrandr then my external display immediately becomes ungarbled.

Specifically, the command:

xrandr --output LVDS-1 --off

(and then, because it starts in mirror mode with a non-native resolution of my
monitor)

xrandr --output DisplayPort-0 --auto



I'm using Arch and am selecting the ATI card via vgaswitcheroo first.  Here's
my uname-a


Linux bender 2.6.35-ARCH #1 SMP PREEMPT Fri Aug 27 17:14:28 CEST 2010 x86_64
Intel(R) Core(TM) i5 CPU M 450 @ 2.40GHz GenuineIntel GNU/Linux

Package versions:

local/xorg-server 1.8.1.902-1
local/xf86-video-ati 6.13.1-1 (xorg-video-drivers)
local/ati-dri 7.8.2-1

Hope this helps anyone who may find this trade-off suitable until a proper fix
is found.

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