https://bugs.kde.org/show_bug.cgi?id=404934
Bug ID: 404934
Summary: Keyboard modifiers cause touchpad disable to get stuck
Product: Touchpad-KCM
Version: unspecified
Platform: Ubuntu Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: daemon
Assignee: rajeeshknamb...@gmail.com
Reporter: spa...@gmail.com
Target Milestone: ---
SUMMARY
Intermittently (a few times per day) my system enters a state where using
modifier keys (shift, alt, control, super) results in the touchpad staying
disabled when it should be disabled for just 250ms or not at all. The precise
behavior is not always predictable, but at least one such mode comes up
repeatedly.
STEPS TO REPRODUCE
1. unknown requirements to enter the problematic mode
2. press and release Alt key
3. press and hold Alt key
4. release after a few seconds.
OBSERVED RESULT
Press and release causes the touchpad to disable for the configured delay,
250ms by default.
Press and hold causes the touchpad to disable for the configured delay, then
re-enable after the delay while the key is still held. Release causes the
touchpad to disable indefinitely, until Alt is tapped again.
EXPECTED RESULT
As in normal usage, no part of modifier/shortcut usage should trigger the
touchpad disabling behavior.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 19.04
KDE Plasma Version: 5.14.90
KDE Frameworks Version: 5.54.0
Qt Version: 5.11.3
ADDITIONAL INFORMATION
This is probably a duplicate of #332654 from five years ago.
I have run xev while the problem is extant and it registers all the keyboard
events that I expect for pressing and holding and releasing the key, and no
touchpad events when the touchpad is disabled.
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