[BUG] In fullscreen certain resolutions give the monitor a "No signal"

[leronoa]

General

• v0.8.3, cde449d [P v1.3 Win64, 8438ef5]

Describe the bug
In fullscreen certain resolutions, selected in the PFM settings, make the monitor give a blackscreen with "No signal detected". One of these resolutions is the default 1280x1024.
These resolutions work on Windows 11 settings (except 640x480 that is not available to select) and for example Gmod.

To Reproduce
Steps to reproduce the behavior:

1. Go to the settings of PFM.
2. Switch to one of the troublesome resolutions
3. Switch to fullscreen
4. The monitor would lose signal

Expected behavior
No supported resolution should make the monitor lose signal

Hardware (please complete the following information):

• OS: Windows 11 24H2
• GPU: RTX 3070 Ti Laptop
• GPU Driver version: 572.42

Log

log.txt

Additional context
Here is a list of the resolutions that give a "No signal detected". Most of these are not usable at all, but the default one is of them:

• 640x480
• 800x600
• 1024x768
• 1152x864
• 1280x960
• 1280x1024

[Silverlan]

Can't replicate this on my side. Does it happen every time, or only sometimes? Also, does it cause Pragma to crash, or do you just get a black screen? What happens if you cycle the input modes on the monitor, does it get the signal back?

[leronoa]

Trying things around i found the culprit! It's G-Sync (my monitor has VRR).
For whatever reason it doesn't play nice with Pragma at those resolutions, if i disable it Pragma enters fullscreen no problem.

It doesn't crash PFM, i think, i can close it gracefully with F12 or force-close it with ALT+4. I can't see, but i guess a crash would nag you with the confirm dialog for a crash dump.

I tried cycling the inputs, no change.