Katawa Shoujo Forums

I don't have any metamodes line anywhere in my xorg.conf, but I will try that later, thank you.

If you don't have that line, then just add it. It Should look something like this:
(the nvidia-auto-select could come in handy, btw. So I included it)
Section "Screen"
Identifier "Screen0"
Device ...

Loose those modelines, and instead in Section "Screen" look for
option "metamodes" "(here might be something)"

and change the line into (assuming You are normally using 1280x1024) :
Option "metamodes" "1280x1024_75 +0+0; 800x600_60 +0+0;"

If this does not help, there's always xinit route. A ...

Thanks for the hint, but it doesn't seem to work. I added modelines for 1280x1024 (max resolution of my screen) and 800x600 (default resolution for KS), both at 60 Hz (supported by the screen according to its specs) to my xorg.conf, and the same problem persists.

I have a few possible solutions ...

I'm running the game on a 64-bit Debian Linux (using the testing repositories, in case that matters) system, on an Intel Pentium E5500 2.8 GHz, with an Nvidia GeForce 6600 using the official Nvidia drivers. Whenever I try the fullscreen mode, a warning pops up in my screen saying something about ...