Full-screen mode black screen with Default refresh rate

[mark_k]

I'm testing WinUAE (3.3.0 beta 6) on Windows 10 64-bit.

My laptop has an Nvidia Quadro NVS135M graphics chip, driver version 341.92. Screen resolution is 1920×1200 with default 60Hz refresh rate. Using the Nvidia Control Panel I created a custom resolution 1920×1200 at 50Hz and that's what my desktop mode is.

In WinUAE full-screen resolution is set to Native (or 1920×1200 works the same).

In Display settings there are three choices for full-screen refresh rate: "Default refresh rate", "50Hz PAL (*)" and "60Hz NTSC". The last two work fine, but with "Default refresh rate", switching to full-screen mode the screen remains all-black. Emulation is running, just with a black screen. That only happens with graphics API Direct3D. With DirectDraw the full-screen display appears OK (just very very slow).

Is that a known issue? There don't seem to be any relevant log messages (but I'll attach part of the log shortly).

[Toni Wilen]

Default only sets D3DDISPLAYMODEEX frequency parameter to zero which means "driver can decide". Perhaps it selects some out of range rate?

[mark_k]

When the screen is blank (full-screen default refresh), pressing F12 does bring up the settings window. So it seems the problem might only be with the D3D surface???

A couple of logs and config attached. Not sure if there's any relevant info in there though.

[Toni Wilen]

B=0I

Try double buffer setting. No back buffers ("no buffer" display panel setting) probably isn't fully supported, at least in non-fullscreen modes.

[mark_k]

The issue happens whatever buffering is set to: Black (emulation) screen with default refresh rate (with any buffering setting), whereas the screen appears correctly with refresh rate 50Hz or 60Hz (with any buffering setting).