Comment 105 for bug 30447

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Paul (launchpad-ubuntu) wrote : Re: Lockup problems with both the free xorg ATI driver and the proprietary fglrx driver, using various ATI cards

I'm also getting lockup problems now that I've upgraded from breezy to dapper, with the accompanying ATI driver upgrade. My graphics card is:

0000:01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M6 LY

... on a Thinkpad X31. I am using the free xorg ATI driver. The bug I have (which seems to be the same as at least some of the complaints on the thread) are semi-random full lockups when there are large screen redraws, particularly things involving fullscreen.

I used to lock up after a few minutes when switching between screens in metacity or moving around large windows, but now after removing "load dri" and "load glx" and adding option "NoAccel" I've only been locking up when I am doing something in fullscreen or switching between fullscreen and non-fullscreen (my trigger for this is watching a movie with mplayer as "mplayer -vo sdl -ao sdl -framedrop foo.avi" or "mplayer -vo sdl -ao esd -framedrop foo.avi" and then hitting "f" to switch between fullscreen and non-full screen).

There also seems to be a timing element involved---fullscreen will work when I've just rebooted my machine and logged into gdm, but after a few minutes fullscreen will lock up with either the current screen, or a set of black and white dots (often with a small rectangle somewhere on the screen).