ATi mach64 + LCD panel
Serge
serge.de.souza at gmail.com
Tue Sep 13 11:29:47 UTC 2005
Greg Trounson wrote:
> Gidday,
>
> I have a motherboard with an onboard Mach64 chip:
> 01:07.0 VGA compatible controller: ATI Technologies Inc Rage XL (rev 27)
>
> I am using this with a 17" 1280x1024 LCD panel.
>
> Now when I launch X.Org using the recommended 'ati' driver, any screen
> updates are terribly slow, not only for 3D but also 2D. Just scrolling
> a web browser window is unbearably slow (~3fps). Switching to the vesa
> driver reveals that the graphics chip is quite fast, so the ati driver
> is clearly defective.
>
> The problem with the VESA driver, however is that it doesn't recognise
> 1280x1024 at 60Hz, instead opting for 1280x1024 at 61Hz, which no known LCD
> panel can display.
>
> Unfortunately the vesa driver ignores all "NoDDC" "IgnoreEDID" and
> ModeLine directives. My desired mode is listed in /var/log/Xorg.0.log
> as a "Future Video Mode" so I assume that is not supported at this time?
>
> So at the moment we seem to have two options: Fast vesa driver at
> 1024x768 or slow ati driver at 1280x1024. Neither of which is really
> acceptable.
>
> Any ideas?
>
> thanks,
> Greg
>
Have you tried the drivers from http://www.retinalburn.net/linux/ ? I
use them on an old box I have that still runs RH9. Not sure how they
work with Xorg but should be worth a try if you are desperate.
Serge
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