maybe switch to fullscreen and back.
Not really sure if we can even detect the screensaver from running.

Don't use screensavers. It's 2019.

https://en.wikipedia.org/wiki/VESA_Display_Po … ement_Signaling

DosFreak wrote:

Don't use screensavers. It's 2019.

Unless they amuse you.

Which screensaver are you talking of?
DOS screensaver or host system screensaver?
A DOS screensaver just calls the BIOS to mute the video output.
If that results in garbled screen, then there is a deficiency in DOSbox.

I meant the amount of time in minutes before the screen blanks and goes into screensaver mode, then sleep mode in an hour.

That is, host system Win10..

Qbix wrote:

Not really sure if we can even detect the screensaver from running.

SDL takes care of it for some platforms based on the SDL_VIDEO_ALLOW_SCREENSAVER env variable.

How do I set that environment variable and what should I set it to??

I'm not sure disabling the screensaver is what I want to do.