Comment 49 for bug 541501

My screen (z61m also with ATI x1400) doesn't shiver horizontally as much as vertically - it looks like vertical hold problems on an old TV. I hope it's the same bug.

In any case, I checked my radeon-kms.conf file, it already had 'options radeon modeset=1' (I must have set that long ago, trying to fix other issues with ATI back in the 8.04 install) so I changed to modeset=0. One immediate change after reboot was that previously, the splash screen had been coming up in high resolution and the text in the virtual screens (ctl-alt-F1, etc.) had been very, very tiny. Now on the new boot the splash is big and the text in the virtual screens is large (same as it was in 8.04). I have mixed feelings about the font size - it was hard to read but allowed me to put a lot of text on the screen at once! :)

I haven't seen the vertical hold issue again yet,. It's been running for about six hours. So apparently changing the modeset works for me too.