Bug 460770

Summary:	Moving mouse during monitor power save blocks input
Product:	[Unmaintained] Powerdevil	Reporter:	Paul Pfann <ppfann>
Component:	general	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	me, nate
Priority:	NOR
Version First Reported In:	5.25.5
Target Milestone:	---
Platform:	Manjaro
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Paul Pfann 2022-10-20 16:10:04 UTC

SUMMARY
***
Interrupting the monitor power save at the right moment puts the system into input-blocked state.
***

STEPS TO REPRODUCE
1. wiggle mouse during the short screen dimming animation, before the power save


OBSERVED RESULT
Keyboard is totally locked out, including ctrl-alt-Fkeys to switch TTY. Mouse cursor can move but buttons are blocked. System is still responsive, and Plasma GUI shows hover animations (such as thumbnail pop-ups on the taskbar) and other signs of life. With no way to interact with system, a reset is the only apparent escape.

The system returns to normal if a second monitor power save cycle completes. In normal use this won't be obvious since it involves a long wait.


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 5.19.13-1-MANJARO x86_64
KDE Plasma Version: Plasma 5.25.5


ADDITIONAL INFORMATION
Reproduce by setting the monitor power save to 1 minute and use phone stopwatch to time the mouse wiggle :)

Comment 1 Bug Janitor Service 2022-10-20 16:34:13 UTC

Thank you for the bug report!

Please note that Plasma 5.25.5 is not supported for much longer by KDE; supported versions are 5.24, and 5.26 or newer.

If at all possible please upgrade to a supported version and verify that the bug is still happening there.

Comment 2 Paul Pfann 2022-11-03 15:30:50 UTC

Seems to be fixed on Plasma 5.26.2