Serious Sam 3 "Cannot Set Display Mode" Fatal Error Trying to blast aliens only to be stopped by a "Fatal Error: Cannot set display mode" message is a classic Serious Sam frustration.
Under , enter: -w 1920 -h 1080 (replacing with your desired resolution). serious sam 3 cannot set display mode
A corrupted DirectX installation can also cause display mode failures. Although Steam installs these automatically, they can get damaged by OS updates. Serious Sam 3 "Cannot Set Display Mode" Fatal
If you want, tell me your OS, GPU model, and a short copy of the game log lines showing the error and I’ll give the exact commands/edits to try. Although Steam installs these automatically, they can get
The fastest way to bypass this error is to force the game to start in a window rather than defaulting to a broken fullscreen mode. Open your . Right-click on Serious Sam 3 and select Properties . Under the General tab, look for the Launch Options box. Type in: +sam_bfullscreen=0 Close the window and launch the game.
If launch options fail, you can manually override settings in the game's .ini file.
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