Re: Flickering screen on a cinema display.
Charles Plessy wrote:
> I have just installed Etch on a powermac7,3 with a cinema display, but
> very unfortunately, the screen flickers, making it difficult to work
> with the computer.
>
> I have found a hint on the fglrx page
> (http://www.stanchina.net/~flavio/debian/fglrx-installer.html): it seems
> necessary to reduce the refreshing frequency of the screen. However, in
> /etc/X11/xorg, there are two ranges of, horizontal and vertical, so I
> do not know how to tell xorg to refresh at 50 Hz.
>
> Did anybody experience the same problem and found a solution ?
Yes, I had this with a radeon 9200 on a PC and a 1600x1200 LCD connected via
DVI (Did not occur with VGA). I had to tell xorg to ignore edid and I
modified each mode line's dot clock to the absolute lowest it would go (down
to 2 decimal places). I still had flickering at 1600x1200. I've since
replaced it with a Fire GL X1 card and the flicker is completely gone.
It seems to be the fact there's not enough bandwidth on a single link DVI
cable. I didn't have a dual link to test with so I'm not sure if that helps
or not.
My monitor is a Samsung SyncMaster 204T 20" LCD
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