Reposting the bisection in a form that survives whitespace collapsing - the table in the description lost its column alignment. Each value is labelled here.
Config 1 - stock (Panel Replay ON, VRR ON): selective-fetch failures 1, PSR idle timeouts 14, FIFO underruns 2, ATS faults 10 -> DISPLAY CORRUPTED Config 2 - xe.enable_psr2_sel_fetch=0 (Panel Replay ON, VRR ON): selective-fetch failures 0, PSR idle timeouts 3, FIFO underruns 1, ATS faults 0 -> DISPLAY CORRUPTED Config 3 - xe.enable_psr=0 xe.enable_panel_replay=0 (Panel Replay OFF, VRR ON): selective-fetch failures 0, PSR idle timeouts 0, FIFO underruns 0, ATS faults 0 -> OK Config 4 - xe.enable_panel_replay=0 (Panel Replay OFF, VRR OFF): selective-fetch failures 0, PSR idle timeouts 0, FIFO underruns 0, ATS faults 0 -> OK Each configuration was tested with the same reproduction: several minutes of fullscreen video, entering and exiting fullscreen repeatedly. Counts are from "journalctl -b -k" for the corresponding boot. Conclusions: 1. Panel Replay is enabled in both failing configurations and disabled in both working ones. 2. Config 3 is the key data point: Panel Replay OFF was stable while VRR was still ON. VRR alone is therefore not sufficient to trigger the failure. Panel Replay is the necessary ingredient. 3. PSR itself is not at fault. Config 4 leaves PSR fully enabled and is stable, so a Panel Replay quirk for this panel is sufficient - disabling PSR wholesale would cost power saving for no reason. 4. "Selective fetch area calculation failed in pipe A" is present at boot in the working configuration too, so it appears unrelated to the corruption. I am happy to test patches or collect additional debugfs output on this hardware. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2163125 Title: drm/xe Panther Lake: DP Panel Replay causes display corruption on Samsung ATNA40HQ09-0 (ThinkPad X1 Carbon Gen 14) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2163125/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
