Comment 3 for bug 1157490

A bit of necromancy on an old bug report, but in case someone else is seeing this:

Yes, this is an SDL issue, but DOSBox could instruct SDL to work correctly.

To *work around* it, you can use environment variable: SDL_VIDEO_FULLSCREEN_DISPLAY=<number> AND use dosbox settings: sdl.fullresolution=<resolution of the display you selected> (do not use value "desktop"!).

Or you can use steam-dos, which does it automatically: https://github.com/dreamer/steam-dos