Video signal is sometime lost when using VRR

NVIDIA Open GPU Kernel Modules Version

575.64.05

Please confirm this issue does not happen with the proprietary driver (of the same version). This issue tracker is only for bugs specific to the open kernel driver.

• I confirm that this does not happen with the proprietary driver package.

Operating System and Version

Arch Linux

Kernel Release

6.15.9-arch1-1

Please confirm you are running a stable release kernel (e.g. not a -rc). We do not accept bug reports for unreleased kernels.

• I am running on a stable kernel release.

Hardware: GPU

GeForce RTX 2080 SUPER

Describe the bug

When using VRR with the Alienware AW2725DF (2560x1440 360Hz DisplayPort) monitor and the frame rate is low, the monitor sometime looses video signal. I have to disable VRR by closing or unfocusing the game/app to get video signal back. If VRR is switch from on to off, the screen will briefly looses signal. The issue doesn’t happen with my 2 other screens (144Hz and 75Hz).

To Reproduce

• Set the monitor to 360Hz.
• Launch vrrtest and close it.
  In KDE Plasma display settings set Adaptive Sync to "Always" and wait.

nvidia-bug-report.log.gz

Bug Incidence

Sometimes

nvidia-bug-report.log.gz

nvidia-bug-report.log.gz

More Info

This issue can happens in games if the framerate goes below the monitor minimum refresh rate (48Hz) with both KDE and Gnome Wayland.

Monitor EDID: aw2725df_edid.gz
This issue also happens with the latest 580.65.06 driver.

Start by reproducing the loss of signal with vrrtest on the Alienware AW2725DF at 360Hz, using KDE Plasma or GNOME Wayland with VRR enabled. Review nvidia-bug-report.log.gz and aw2725df_edid.gz, comparing the reported behavior across driver versions 575.64.05 and 580.65.06. Done means the display remains usable when VRR is enabled and the frame rate falls below 48Hz.