Radeon and flat-panel flickering

[Alex Deucher]

On 4/17/07, Russell Shaw <rjshaw at netspace.net.au> wrote:
> Hi,
> With a radeon 9550 card and a mitsubishi DV-175 lcd monitor, the screen
> has "static" in the form of bursts of noisiness of 20-50 horizontal pixels,
> like you'd expect from a broken cable. Occaisonally the screen would roll or
> blink too. The DVI-I cable is ok however.
>
> I was using the open source radeon driver in a recent Xorg setup.
>
> The noisiness is present in console mode and when xorg.conf is set up
> for the monitor in it's native 1280x1024 resolution. With xorg.conf
> set for 1024x768, the noisiness goes away. Installing the ATI fglrx
> driver also eliminates the noise.

try setting:
Option "DisplayPriority" "HIGH"
in the device section of your config file.

Alex