Open raidhy opened 3 months ago
mujeeb-intel
commented
3 months ago Hi @raidhy thanks for reaching out. I'm going to try to replicate this issue.
Can you just confirm if the following repro steps/understanding are right:
Is this all the replication steps?
raidhy
commented
3 months ago I'm unsure exactly when the problem arises as I don't have custom resolutions, so my refresh rate options go 165, 240, 270Hz. Only the former has functioning VRR, 240Hz also doesn't work from my experience. Other than that, those should be the steps, yes.
mujeeb-intel
commented
3 months ago Okay, sounds good. I think we have 144hz and 165hz as well. Not sure about the 260hz but I'll give it a shot and get back to you if I have any questions.
Thanks.
raidhy
commented
3 months ago Sorry if i wasnt clear. From my testing you won't run into the issue on a 165Hz screen. I think a 240Hz or higher would be necessary. I can try and see if the issue still arises at say 180Hz, but as far as I'm aware VRR functions correctly at 165Hz and you would need a higher refresh rate to test it.
mujeeb-intel
commented
3 months ago Ah! Okay. That helps narrowing it down. Yeah if you can test it at 180hz let me know. I'll start my hunt for a higher refresh rate monitor.
mujeeb-intel
commented
3 months ago Hey @raidhy any confirmation on 180Hz? Trying to understand exactly when this issue happens so I can easily replicate it.
Edit:1 and you are connected through display port?
raidhy
commented
3 months ago @mujeeb-intel Sorry, life has been in the way recently! I'm not sure of how much use the testing would be though as it would involve creating a custom resolution which may introduce its own issues.
Both displays are connected via displayport.
smylava
commented
2 months ago Hi @raidhy, We used a panel which supports highr RR like 240, 300 and 360 too and still unable to replicate the isuse, VRR functionality is as expected duting the gameplay. Is it possible for you to share the panel edid with which you are able to replicate the isuse?
raidhy
commented
2 months ago @smylava The panel I'm using is an Asus XG27AQM, which is 1440p 270Hz. Is the panel that you tested on a 1080p panel? I just tested again with Baldur's Gate 3 and found if I reduce panel resolution to 1080p then VRR works as expected even at 270Hz, so it appears to only break at high refresh rate + high resolution. I hope this helps.
raidhy
commented
1 month ago @smylava @mujeeb-intel Okay, so I did a little more testing and what I said above isn't actually the case - what is actually happening is that the reduction in resolution results in a framerate increase from ~105fps to ~150fps, and this increase then seems to allow VRR to function correctly. This would explain why it works in your testing (presumably at 1080p) and why it works in CS2 but not the other titles for me. I'm not sure at what exact framerate VRR stops working, but setting graphics all to low at 1440p 270Hz results in ~150fps and working VRR. My monitor supports 48-270Hz so 105fps shouldn't be a problem, as such I don't believe it to be the monitor that is the issue. Of course, this doesn't explain why it starts working again at 165Hz at 105fps. Perhaps it's the large discrepancy between the refresh rate and actual framerate? Hope this helps diagnose the problem.
raidhy
commented
1 month ago Further testing seems to point at the problem being any framerate that is lower than half of the refresh rate - getting a game (such as BG3 medium settings) to run at 135fps has it work at 270Hz, but anything lower doesn't - I also tested this with other refresh rates, ie 120fps at 240Hz is the limit etc. I've noticed that the most recent driver update is causing screen flicker when VRR is functioning properly, leading me to now have to disable adaptive sync completely.
mujeeb-intel
commented
1 month ago Hey @raidhy Thanks alot for your findings. This will really help us.
We need one help from you. We need to obtain the EDID for your monitor. Its super easy.
raidhy
commented
1 month ago Here you go, sorry for taking a while - hopefully I did it correctly: dispdiag.zip (Also to clarify the .zip, github doesn't let me upload .dat)
Checklist [README]
Game [Required]
Baldur's Gate 3
Game Platform [Required]
Other game platform
No response
Processor / Processor Number [Required]
AMD Ryzen 5 5600
Graphic Card [Required]
Acer BiFrost A770 16GB
GPU Driver Version [Required]
32.0.101.5768
Other GPU Driver version
No response
Rendering API [Required]
Windows Build [Required]
Windows 11 24H2
Other Windows build
No response
Intel System Support Utility report
igcit_ssu.txt
Description and steps to reproduce [Required]
VRR doesn't seem to be working properly in certain titles at refresh rates higher than 165Hz. I've replicated this behaviour in Baldur's Gate 3 (both DX11 and VK), Forza Horizon 4, and Battlefield 2042. Opening any of these games with any window type at a refresh rate of 270Hz results in a refresh rate that fluctuates seemingly randomly without regard to the in-game framerate. However, setting the refresh rate to 165Hz either in game or in Windows, VRR works as expected. This appears to always happen, regardless of if VRR is set to only fullscreen or fullscreen+windowed. Capping framerate manually or with VSync doesn't change the outcome.
The monitor is G-Sync Compatible and previously worked as intended with my 1660S. Arc Control shows a variable refresh rate range of 48-270Hz. Installing IGCC and turning off Adaptive Sync Plus appears to get VRR working as intended at 270Hz in the above titles, but my desktop is then stuck at 48Hz.
VRR for unsupported games is turned on in Windows. ReBAR and 4G are enabled and this was tested with a clean (DDU) installation of the latest drivers, though I've noted this behaviour on the previous drivers also.
I used Microsoft's Dynamic Refresh Rate Tool for the graphs below, and its output is identical to the values displayed by the monitor's OSD.
Both of these were recorded while in the main menu (~105fps), but the issue persists throughout all gameplay for all the mentioned titles no matter what window type (Exclusive Fullscreen, Borderless Windowed, Windowed).
This isn't a universal issue as it seems to work as intended in CS2, though comes with it's own weird behaviour where my desktop sits at 180Hz after tabbing out of the game.
Game graphic quality [Required]
Game resolution [Required]
2560x1440
Game VSync [Required]
Off
Game display mode [Required]
Detailed game settings [Required]
BG3 graphicSettings.txt
Device / Platform name
No response
Crash dumps [Required, if applicable]
No response
Save game
No response