Requiem did not start after resolution changes

[Peculiar]

Hello!

I bought the PenumbraCollection a couple of days ago and till today everything worked fine (played Overture and Black Plague with 1920*1200 on the latest linux mint - same as Ubuntu 10.04 - )
Then I tried to set the same settings on Requiem. But after the restart I had only a black screen and the Mouse cursor on the screen. Killing the game is also not possible.

First thing I tried was to delete the settings-file. But surprisingly, in the home/myfolder/PenumbraCollection/ directory was no file called settings and no subfolder (reqiuiem) either.

E4400; 8800GTS 512; 2.6.32.21 Isodora Mint Linux

It would be very nice if someone has a solution.