[Bug 16374] Screen blanks when using DVI at 1920x1200 with an X1300 ( PCI ID 1002:7187)

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=16374


nils <nils at knabber.homelinux.net> changed:

           What    |Removed                     |Added
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                 CC|                            |nils at knabber.homelinux.net




--- Comment #16 from nils <nils at knabber.homelinux.net>  2009-02-08 08:08:04 PST ---
I've read many bug reports about radeon cards, dvi and flickering/blank screen.

Is there any chance to solve this problem?
I've tried:
- every options in "man radeon"
- different modelines
- debian lenny radeon driver and the git master from today

After some hours of testing:
I discover that these two lines in xorg.conf reduces the frequency of blanking:

Modeline "1920x1200R" 152.00 1920 1968 2000 2080  1200 1203 1209 1240 -hsync
+vsync
Option "PreferredMode" "1920x1200R"

The idea is changing the polarity and reducing the frequency from 60 to 58.

Everything is working fine with the VGA-port or in windows with VGA or
DVI-port. 

I use a radeon 9200 SE and a Samsung 2433 with a resolution of 1920x1200 pixel.
I don't see any conspicuous line in /var/log/Xorg.0.log.

Which further information are needed to fix this bug? 


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