Garry’s Mod and all other Source games have been working very well on my PC, but suddenly, they crash on start up. I exited GMod earlier today, and when I started it again today, I get the Failed to create D3D device! error. I reinstalled all my drivers and DirectX software. I can start the game by setting -dxlevel 80 in the launch options, but when I change my resolution to widescreen, the game crashes again. Any clue how to fix this?
• Nvidia 9800M GS Graphics Card
• Intel Core 2 Duo Processor
• 4GB of RAM
Edit: Fixed. For some reason it completely fails to run on 1366x768, my preferred resolution…