You can just change your resolution in game if that is the case. However you have to manually set it twice in this situation. It needs fixed. There is literally no reason to have a resolution setting in the steamdeck external display setting if it’s not going to work in game.

Hi today I’m having this problem. Games crash after start up. I have a 14900K. I do have it undervolted and I’ve been gaming on it every day this week without a problem. Only thing that changed since yesterday was new nvidia drivers, so I will rollback right now to see if that helps. However I do have a error code that you listed. Can you advise?

Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0xc0000005
Fault offset: 0x0000000000000001
Faulting process id: 0x0x4624
Faulting application start time: 0x0x1DA08F01944D46E