Fedora with ATI Radeon 7500 and AOC 7Klr weird video problem

From: Curtis Rempel (curtis_at_telus.net)
Date: 01/28/04


Date: Wed, 28 Jan 2004 20:45:02 GMT

I've got a dual boot system with a Radeon 7500 and AOC 7Klr monitor which
works fine under XP. When I dual boot to Fedora (or even during the
Fedora install process), the screen is very washed out, almost as if the
brightness was too high and the contrast too low. Booting back to Windows
without touching the monitor controls gives a great picture however.

I reinstalled Fedora using an IBM 2237 monitor and the picture was
great during install and subsequent boot. Fedora does not know about the
AOC7Klr so I found the refresh rate settings on the AOC web site
and plugged them into MonitorsDB so I could select the monitor
using redhat-config-xfree86 - didn't change a thing, still all washed
out.

Given that the IBM monitor works fine, I doubt that the Radeon 7500
is the culprit. That leaves the AOC 7Klr - however it works fine
under Windows. Has anybody seen this sort of behavior? It's almost
barely usable if I play with the monitor brightness/contrast (but still
quite annoying). Of course, when I reboot to XP, I have to fiddle with the
controls again to get the picture looking ok again.

Any suggestions are welcome. I've done a ton of Linux installs but this
is the first time I've seen this one.

Thanks,

Curtis



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