I have a dual screen setup which I've configured by running this command at startup:xrandr --output VGA-0 --auto --right-of DVI-0I'm running OpenSuse 11.4 with dwm as my window manager. I can post the output of any command or dump any file if you think it will help.The problem happens when I try and run a fullscreen game. My right screen goes black and loses the signal. On the other screen, my resolution goes down and I see a magnified version of the upper left corner of my desktop (the dwm tag bar). I can hear the game audio but I can't see anything other than what I described above.Another important thing is when this happens I need to reboot (or at least restart X) because I get no input and can't close anything.EDIT 102:00.0 VGA compatible controller: ATI Technologies Inc Juniper [Radeon HD 5750 Series]I'm not sure how I can find what driver I'm using, but I expect it's opensuse's stock driver. When the issue happens, I can't see my mouse at all -- even if I try and move it to the upper left. Pressing Ctrl+Alt+F1 drops me to a command line login. Once I enter my information I can hear the audio again but I am in still the CLI. Alt+SysReq+S does nothing at all.EDIT 2After running the game and getting locked up, I hit Ctrl+Alt+F1 and was brought to a shell. I logged in and ran my display command and received the following error message:X Error of failed request BadMatch (invalid parameter attributes)  Major opcode of failed request: 150 (RANDR)  Minor opcode of failed request: 7 (RRSetScreenSize)  Serial number of failed request: 40  Current serial number in output stream: 41It looks like it's saying I've mistyped it or something, however I tried a couple times and I'm fairly certain my syntax was correct. I still tried going back to X with Ctrl+Alt+F7 and I was stuck in the same situation. I then went back to the console and killed the game's process, and went back to X to see what happened. The resolutions and screens were still messed up, however I had mouse and keyboard support and could use my browser.
Can't run certain fullscreen applications
opensuse;x11;graphics;dwm
I ended up being able to fix the issue by installing fglrx from the SuSE repositories. It seemed some capabilities (acceleration) were not supported in the open source version of the driver.