Ubuntu
xserver-xorg-video-ati package

  1. Bug #570011
  2. Comment #22

Comment 22 for bug 570011

Revision history for this message
Tim Holy (holy-wustl) wrote :

I have now installed Lucid on a new hard drive, and with a bit more experience I can amplify this report a bit. It turns out that this largescreen monitor also fails even if the monitor is connected after the boot process, IF compositing is turned on. The only reliable way to get the monitor to work is to first turn desktop effects off. However, if I turn desktop effects off (in Kubuntu's SystemSettings->desktop) and then reboot with the monitor connected, this is not sufficient to fix the boot problem: I still get the "wiggly lines" on the kdm login screen (and thereafter).

I wonder if specific problems during booting might have something to do with compositing being on at some point during the process, before my own configuration turns it off?

I think the reason I didn't notice this extra twist when I was trying the live CD is that compositing must have been auto-disabled; I have noticed that happening frequently on its own. I now just turn off desktop effects all the time and wait to connect the monitor until after I have logged in. These steps appear to work around the problem.