Version: (using KDE 4.4.1) Installed from: Gentoo Packages I played a game with wine, that changed the resolution of my screen from 1920x1200 to 800x600. After exiting the game, I had to manually switch back to my original resolution with the KDE system settings. After that, all my fonts were unreadably small, but the font size was still at 9.0 according to KDE's font settings dialog. Switching the resolution or the font size didn't help, I had to log out and back in to get fonts of normal size. In case it matters, "Force Fonts DPI" was disabled all the time and "Use anti-aliasing" enabled.
The same thing is happening to me. When the resoulution is changed by wine and wine crashes, the font size stays small even if I change my resolution via system settings.
Same thing happening on OpenSuse 11.4 and KDE 4.6.3. My game wasn't run through wine, it was a native Linux (SDL) binary.
I can confirm this bug on KDE 4.9.5 (OpenSuse 12.2) using nouveau-driver. To trigger the bug I start a full-screen game (dark-oberon) in 800x600. The game crashes on exit, so I kill it on the console, then manually switch back to the native resolution (1920x1200). xdpyinfo said 96x96 dpi before the game was run, afterwards 48x48 dpi.
I just tried the same with XFCE-Desktop. Turns out qt-based applications are affected, while GTK-based ones are not.
This still happens even on 4.13.0. This is a 4 year old bug, will no one look at it?
> xdpyinfo said 96x96 dpi before the game was run, afterwards 48x48 dpi If the DPI information is not correctly restored, the bug is either in XRandR, or in Wine.