Bug#481361: xserver-xorg-video-ati: No display on DVI output
On Fri, 16 May 2008, Alex Deucher wrote:
> 1920x1200 is probably a bit much for your card bandwidth-wise.
Sure, this graphics card is pretty old and not very powerful. However:
* I used it to drive the VGA output in 1920x1440x75Hz for 7 years with
my 21" CRT.
* About 6 months ago I switched to an LCD screen and used it to drive
the DVI output at 1920x1200x60Hz without trouble.
* It's only last wednesday when I upgraded that the DVI output stopped
working at all.
* I have since downgraded the driver to and I'm using the DVI output in
1920x1200x60Hz (as confirmed by both xrandr 1.1 and my LCD screen).
So it's not a hardware problem.
> Do lower resolutions work ok? (1680x1050 or 1024x768) You might try
> reducing your color depth to 16 bits.
I thought about an issue with the single-link DVI bandwidth limit too.
So I tried 1600x1200x60Hz and 1024x768x60Hz and neither worked. I did
not try 16 bits mode.
> The following options may also
> help: Option "DefaultTMDSPLL" "TRUE" Option "DisplayPriority" "HIGH"
> If that doesn't help, try a modeline with a reduced refresh rate (50
> hz rather than 60):
> Modeline "1920x1200_50.00_rb" 127.75 1920 1968 2000 2080 1200 1203
> 1209 1229 +HSync -Vsync
I will try this tonight. Do these correspond to driver settings that
changed between 6.6.3 and 6.8.0?
Francois Gouget <email@example.com> http://fgouget.free.fr/
Avoid the Gates of Hell - use Linux.