Display initializing to 3D mode / 30Hz since 5.0-4657 (Quad-buffered stereoscopy)?

[TurboK]

I got enthusiastic about testing the new builds on my HTPC since the ubershaders were merged. I have had no problems with Dolphin 5.0. But now the newer builds have something going on with the monitor initialization. I have not forked out the culprit, yet, but I'm guessing it has something to do with the Quad-buffered stereoscopy (??) and the following changes.

The problem is this: using the newest builds (on portable installation, only GFX backend switched to D3D (OGL works)), the screen (on my case 3D capable LCD television (Samsung)) switches to 30Hz and the TV says that it has enabled the 3D mode as soon as I launch any game. When I check the display driver properties, it really says 29Hz 1920x1080, and I can not change it back to 59/60Hz as long as Dolphin is running. The screen also appears to have false "blueish" color temperature, as the TV's 3D mode is set up to change this. And the stereoscopy IS off in Dolphin, since I have all the default settings in the portable installation.

I have Windows 10 64bit with latest updates and Intel HD 4600 with the latest drivers from Intel. This also happened with Windows 8.1 64 bit, as I had this up until yesterday and I was too tempted to see if this was a problem with Intel's probably outdated HD 4600 drivers for Win 8.1. Updating to Win 10 (and latest Intel drivers) did not change this.

Anyone else?

[TurboK]

Okay I forked the problem, and it seems my guess was right. The problem starts from Dolphin 5.0-4657 (Implement Quad-Buffered stereoscopy support). The issue can be described shortly: The screen refresh rate is (wrongly) set to 30Hz at game launch on D3D even without Dolphin stereoscopy enabled.

It happens at least on my setup, which includes a 3D capable TV, that interprets this change as if 3D/stereoscopy was turned on, and changes it's visuals accordingly. Other components are Intel HD 4600 (which is entirely capable of delivering 3D HDMI to my TV when playing Dolphin or watching 3D blurays) and Windows 10 Pro 64-bit.

I'll make a proper issue report, unless a trivial fix is announced shortly

EDIT: Note: This does not require the game to be in full screen mode, it happens even in windowed mode, as long as D3D is selected.

[spyro]

can you try to choose unlimited speed to see if it works ?
because i thing there is something wrong on the d3d backend regarding vsync

[TurboK]

can you try to choose unlimited speed to see if it works ?
because i thing there is something wrong on the d3d backend regarding vsync

Tested that out, New Super Mario Bros demo screen plays with FPS up to 250, as it should, but the display's refresh rate still drops down to 29Hz (the refresh rate that my monitor gets and my display driver sends to the display. The game's "speed" or "frame rate" is unrelated to this). Vsync is off by default, and I have not turned it on.

I also thought at first that this might have something to do with vsync, but all the actual settings seem to work in this case, it's just that Dolphin seems to force an unwanted display mode.

EDIT: I made a proper issue report, see https://bugs.dolphin-emu.org/issues/10445 .