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fullscreen not working after graphics card upgrade

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First post, by bennunn

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I've used DOSbox for several years, never had any problems, fairly tech savvy etc. etc.

Last week I upgraded to a new graphics card - Nvidia GTX 980ti - and since then I cannot run DOSbox in fullscreen mode. ALT+Enter just causes the screen to blackout momentarily while it thinks about it and then reverts to windowed.

I've played around with a lot of settings in the cfg file, tried various combinations of compatibility mode etc.

Absolutely nothing worked. It also means that some legacy games that require a DOSbox launcher also don't work now - Theme Hospital, Ultima8 etc.

Windows games that require fullscreen all seem to work as normal.

Oh, and this is DOSBOX 0.74 on Win7 64 bit.

Can anybody help? Thanks

Reply 1 of 4, by Silanda

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In your dosbox config file, what's your video output set as (OpenGL, DDraw, etc), and what's your fullscreen resolution set at?

Also, what did you upgrade from?

Reply 2 of 4, by bennunn

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video output - overlay (have also dried ddraw, opengl, surface)
fullscreen res - original (have also tried 1920x1080, 1024x768, 800x600 and various other standard resolutions)

Upgraded from GTX 570.

Reply 3 of 4, by ripa

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Set fullscreen=0x0 or to your desktop resolution. Also, use output=ddraw.

Also, are there any error or warning prints in the console window when you try to switch to fullscreen?

Reply 4 of 4, by bennunn

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0x0 seems to work - great, thanks!

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