The problem is that when I play GTA: Vice City or San Andreas, for example, the computer may freeze. It happens randomly, I can play several times for half an hour a day and don't get the freeze and the next day I can get it easily. I tried running with the latest updates (OS, video driver and Wine) and without them on older versions of the stuff, but it doesn't matter: I get crashes in each case.
Running Ubuntu 11.10 Oneiric Ocelot, video card HIS Radeon HD4850 11.12 Catalyst, Wine 1.3.36 now.
In Catalyst everything is set to better performance, Catalyst AI - Advanced.
In Wine vertex shader is disabled to avoid a game bug (peds were too dark), 'window settings' are all checked, desktop size is 1920x1080 (maximum). There are two monitors, I'm playing on #1 only, they are set to mirror each other.
The computer seems to be fully hung up: Ctrl+Alt+Backspace or Ctrl+Alt+F1 don't work, but Alt+PrtScr+r,s,e,i,n,u,b combo reboots the computer.