I’m still affected by this issue despite the alleged driver fix. I’ve been running Ubuntu 20.04 for quite some time with a conventional GSYNC monitor and have upgraded to an Asus XG27UQ GSYNC Compatible monitor and this display loses sync if the framerate drops below the VRR threshold and regains sync after blanking out within a few seconds then loses sync again in-game only if the framerate drops below the VRR threshold.
I have tested with the DP cable supplied with the monitor and after experiencing the issue I then purchased a shorter 1m Comsol DP cable (DPDP8K01). Both cables are compliant with DP 1.4 spec and support up to 8K, no adapter is being used, it is plugged directly to the GPU’s DP port and I have tested all DP ports, the problem still persists. The behavior has been observed so far first within the game “Doom Eternal” using the Proton Windows-to-Linux compatibility layer within Linux, I then tested it with the game “Black Mesa” which is a native Linux application using OpenGL and observed the same fault, in both cases upon every replication attempt. Disabling GSYNC/Adaptive Sync within the driver or alternatively via the monitor OSD totally prevents the behavior from occurring. I upgraded to the 495.44 driver from 470.82 with no change in behaviour, I uninstalled this and installed the 470.86 driver in hopes that it would resolve the issue, it has not. This issue is not reproducible under Windows 10, I have tested it thoroughly and the display never blanks out under Windows and I’ve confirmed VRR is engaged via the GSYNC indicator within the driver, this only happens for me on Linux with all the drivers I’ve tried (470.82, 495.44, 470.86). I still have my conventional GSYNC monitor in my possession, the issue cannot be reproduced under Linux using the Dell S2616DG with GSYNC enabled after swapping back to it when troubleshooting. After swapping back to the XG27UQ I have since also tried driver 460.91, no change in behaviour, problem still persists. I have already raised this with Nvidia’s Customer Care team and their representative has declined to offer further assistance or an escalation pathway to resolution on the basis that Nvidia’s support channel doesn’t support Linux. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1950720 Title: GSYNC bug regression in 495.44 Ubuntu 21.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-470/+bug/1950720/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
