Adaptive sync stops working after DPMS power cycle causes monitor to hotplug

Brief summary of the problem:

I recently implemented GPU reset support, as implemented by wlroots 0.18.0, into the labwc compositor, in a rollup package of the wlroots 0.18 supporting patches and some of my own which are waiting for that to be merged, located at the Arch User Repository labwc-wlroots-018-git package.

I coerced a GPU reset by playing a game (Stray) with the DirectX 12 switch, which usually crashes within a few minutes of gameplay. The compositor recovered, but adaptive sync stopped working for my primary monitor. It manages to work temporarily, if I restart the compositor completely, but then stops working again if I DPMS power cycle the monitor in question. I have no other adaptive sync monitor to test with.

Hardware description:

• CPU: AMD Ryzen 7 5700X
• GPU: Navi 22 [Radeon RX 6700/6700 XT/6750 XT / 6800M/6850M XT] [1002:73DF] (Radeon 6700 XT)
• System Memory: 64 GiB
• Display(s): LG 24UD58-B, Dell P2414H
• Type of Display Connection: DP, DP

System information:

• Distro name and Version: Arch Linux
• Kernel version: Linux laharl 6.9.9-1-cachyos #1 (closed) SMP PREEMPT_DYNAMIC Fri, 12 Jul 2024 05:37:27 +0000 x86_64 GNU/Linux
• Custom kernel: linux-cachyos
• AMD official driver version: N/A

How to reproduce the issue:

1. Install a desktop environment which supports recovering from a GPU reset, such as Plasma, or my labwc-wlroots-018-git AUR package.
2. Enable adaptive sync in the environment.
3. Install Steam.
4. Install Stray.
5. Set Stray to use -dx12 command line option.
6. Launch the game.
7. Get into a new game.
8. Play long enough to coax a GPU reset

Alternately, use some debug fs setting to coax a GPU reset.

1. Note the primary display is now blanking itself any time the refresh rate dips below the full refresh rate.
2. Quit the compositor.
3. Restart it.
4. Adaptive sync now works.
5. DPMS power off or hotplug the LG display
6. DPMS now broken.

EDIT: Cancel the above, it's simpler to apply:

1. Install labwc-wlroots-018-git or its equivalent branch.
2. Enable adaptiveSync in configuration.
3. Start labwc.
4. Power off the LG monitor with DPMS.
5. Wait for it to completely go idle.
6. Power it back on.

Log files (for system lockups / game freezes / crashes)

• Dmesg log (full log)
  • dmesg.vrr.txt
• Xorg log
  • N/A as I'm using a Wayland session
• Any other logs
  • journalctl.vrr.txt.gz (2.1 GiB compressed to 28 MiB)

Other info

This seems to be an issue with the GPU reset procedure. The dmesg.vrr.txt log above should show something useful about the reset, I hope. Or maybe the incredibly large journal log above.

Edit: This seems to be triggered simply by DPMS cycle hotplug or unplugging the monitor now. It has nothing to do with GPU recovery.

changed title from Adaptive sync stops working after double GPU reset/recovery, but only after DPMS power off/on cycle per session to Adaptive sync stops working after DPMS power cycle causes monitor to hotplug

changed the description

This appears to have nothing to do with GPU recovery, and appears to break entirely on monitor hotplug or DPMS cycle.

Closing this, as it doesn't appear to be happening any more? Maybe a firmware update fixed it.

closed

Reopening. It seems to be triggered after either DPMS cycle or GPU reset. I have to disable VRR across the compositor.

reopened

mentioned in issue #3460 (closed)