Samsung 204b + ATI Radeon 9250 SE - the saga continues

Published: 2007-11-18 19:21 UTC. Tags: hardware linux review syncmaster_204b

I've previously written about my adventures in getting my Samsung 204b, made in Slovakia, to work properly in 1600x1200 at 60Hz (short story: Can't be done due to bugs in their DVI implementation).

Yesterday, I decided to upgrade my home workstation from Ubuntu 7.04 to 7.10, and of course, the flickering screen syndrome came back.

After lot's of tests with many different options in /etc/X11/xorg.conf, I got some help in a local forum, and came to the conclusion that modifying xorg.conf doesn't help. Using the xrandr command does however offer a way to solve the problem.

I how have the following list of commands in my /etc/kde3/kdm/Xsetup (I use kdm to start my X server, if you use another display manager, adjust the path to one that makes sure the commands are run right after X server startup):

xrandr --newmode "1600x1200@55" 150.0 1600 1804 1996 2160 1200 1201 1204 1250 +hsync +vsync
xrandr --addmode DVI-0 1600x1200@55
xrandr --output DVI-0 --mode 1600x1200@55

Gosh. Seems like there's some kind of bug in the ATI driver in the X.org 7.2 packaged with Ubuntu Gutsy, or perhaps in X.org itself.

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