https://bugs.kde.org/show_bug.cgi?id=414785
Bug ID: 414785
Summary: Notifications cause system lag
Product: plasmashell
Version: 5.17.3
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Notifications
Assignee: k...@privat.broulik.de
Reporter: k...@jbev.net
CC: plasma-b...@kde.org
Target Milestone: 1.0
SUMMARY
Whenever a notification appears, my system starts lagging, including a sudden
break in audio playback. Also, when I am copying files or downloading something
in Chrome (with Plasma integration add-on), desktop effects show noticeable
delay while the operation is running. For example, switching virtual desktops
feels very sluggish, whereas without a progress notification going, it's fast
and snappy. This happens even when the copy/download status notification popup
isn't visible. As long as there is a hidden notification tracking the progress
of an operation, the system is laggy.
STEPS TO REPRODUCE
1. Play some music
2. Trigger a notification
Alternatively:
1. Download a large file
2. Switch between desktops
OBSERVED RESULT
Audio stutter and effect delays.
EXPECTED RESULT
None of that.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Ubuntu 19.10
KDE Plasma Version: 5.17.3
KDE Frameworks Version: 5.64
Qt Version: 5.12
GPU: Nvidia GTX 1080 Ti with 435.21 proprietary driver
CPU: AMD Ryzen Threadripper 2920X
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