http://bugs.winehq.org/show_bug.cgi?id=18391
Summary: Postal 2 - Brightness settings apply themselves to the Desktop. Product: Wine Version: 1.1.20 Platform: PC URL: http://www.gopostal.com/freestp.php OS/Version: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: -unknown AssignedTo: wine-bugs@winehq.org ReportedBy: pvtpuddin@gmail.com
I have the Gog.com version of Postal 2, so I don't have the native Linux version. But when I run Postal 2 in either a virtual desktop, or fullscreen, the game's brightness settings apply themselves to the rest of the desktop.
The default brightness settings washed everything out. And changing the brightness in game, you could see the desktop getting brighter or darker.
If you don't have Postal 2, you could test this with the free demo of the Multiplayer part. You don't have to play the game to see this bug, it'll happen at the menu.