| Summary: | Asahi Linux: Plane operation would have crashed DCP. Screen locker is broken. | ||
|---|---|---|---|
| Product: | [Plasma] plasmashell | Reporter: | Trung Nguyen <ntrung03> |
| Component: | Screen locking | Assignee: | Plasma Bugs List <plasma-bugs> |
| Status: | RESOLVED DUPLICATE | ||
| Severity: | crash | CC: | nicolas.fella |
| Priority: | NOR | ||
| Version First Reported In: | 6.4.1 | ||
| Target Milestone: | 1.0 | ||
| Platform: | Fedora RPMs | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed In: | ||
| Sentry Crash Report: | |||
The message is completely unrelated to the screen locker not working *** This bug has been marked as a duplicate of bug 506316 *** |
SUMMARY On Fedora Linux Asahi Remix 42, the compositor does an illegal request for DCP. The result is (not limited to) the screen locker is broken, requiring dropping into TTY and doing `loginctl unlock-session`. STEPS TO REPRODUCE 1. Login to your user account 2. Wait for the screen to autolock 3. Observe OBSERVED RESULT The screen locker is broken. A message from DCP driver is printed: ``` [ 369.437762] apple-drm soc:display-subsystem: Plane operation would have crashed DCP! Rejected! DCP requires 32x32 of every plane to be within screen space. Your compositor asked to overlay [2355x1571, 2403x1600] on 2560x1600. This is not supported, and your compositor should have switched to software compositing when this operation failed. You should not have noticed this at all. If your screen froze/hitched, or your compositor crashed, please report this to the your compositor's developers. We will not throw this error again until you next reboot. ``` Note that the message is sometimes printed by stuffs thats not the screen locker, though it reliably affects the screenlocker. EXPECTED RESULT The screen locker works normally. SOFTWARE/OS VERSIONS Operating System: Fedora Linux Asahi Remix 42 KDE Plasma Version: 6.4.1 KDE Frameworks Version: 6.15.0 Qt Version: 6.9.1 Kernel Version: 6.14.8-400.asahi.fc42.aarch64+16k (64-bit) Graphics Platform: Wayland Processors: 4 × Apple Avalanche (M2), 4 × Apple Blizzard (M2) Memory: 23.0 GiB of usable RAM Graphics Processor 1: Apple M2 Graphics Processor 2: llvmpipe Product Name: Apple MacBook Air (13-inch, M2, 2022) U-Boot Version: 2025.04 ADDITIONAL INFORMATION Other samples from journalctl: ``` Jul 01 12:43:36 trung-macbookair kernel: apple-drm soc:display-subsystem: Plane operation would have crashed DCP! Rejected! DCP requires 32x32 of every plane to be within screen space. Your compositor asked to overlay [322x1572, 370x1600] on 2560x1600. This is not supported, and your compositor should have switched to software compositing when this operation failed. You should not have noticed this at all. If your screen froze/hitched, or your compositor crashed, please report this to the your compositor's developers. We will not throw this error again until you next reboot. Jul 01 12:43:37 hostname systemd[1089]: Started app-org.mozilla.firefox@46fbaed5d9d347e4af37561d593666ee.service - Firefox - Web Browser. ```