I've been happily playing GP4 with a res of 1440x900 since I got my new widescreen monitor a few months ago. It was as simple as altering the resolution in the f1graphics.cfg. No problem, it looked great.
However, I allowed someone else to play GP4 on my PC and I think they altered the resolution from the in-game graphics menu because now the game is stuck in 640x480, even though the .cfg settings are as follows;
1 ; f1graphics.cfg controls all settings (default 0)
1440 ; [RELEASE] Game 3D Horizontal Resolution
900 ; [RELEASE] Game 3D Vertical Resolution
I've tried deleting the .cfg and letting a new one be created and then altering it to the above, but that didn't work. I also unsuccessfully tried deleting the f1gstate file.
The only way I have been able to get the game to run in 1440x900 has been to force it into windowed mode but I don't want to play that way forever.
Am I right in thinking this was probably caused by a resolution change in-game? If so, I'd be grateful if anyone has any tips that might help me to solve the issue and get playing again!