https://bugs.kde.org/show_bug.cgi?id=403485
Bug ID: 403485
Summary: Pressing TAB results in complete freeze and 100% CPU
usage
Product: plasmashell
Version: 5.14.5
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: Application Launcher (Kickoff)
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: 1.0
SUMMARY
Clicking on the launcher and pressing tab key will freeze plasmashell
consistently.
STEPS TO REPRODUCE
1. Click the lanucher
2. Press TAB
3. No 3rd step
OBSERVED RESULT
Plasmashell freezes with 100% CPU
EXPECTED RESULT
Nothing happens
SOFTWARE/OS VERSIONS
Windows:
MacOS:
Linux/KDE Plasma: Arch Linux
(available in About System)
KDE Plasma Version: 5.14.5
KDE Frameworks Version: 5.54
Qt Version: 5.12.0
ADDITIONAL INFORMATION
Happens on 2 different systems.
Perf Report for plasmashell when issue happens.
# Overhead Command Shared Object Symbol
# ........ ........... .....................
..................................................
#
26.71% plasmashell libQt5Quick.so.5.12.0 [.] 0x0000000000206be8
22.16% plasmashell libQt5Quick.so.5.12.0 [.] 0x000000000020679e
11.09% plasmashell libQt5Quick.so.5.12.0 [.] 0x0000000000206793
9.04% plasmashell libQt5Quick.so.5.12.0 [.]
QQuickItemPrivate::nextPrevItemInTabFocusChain
6.46% plasmashell libQt5Quick.so.5.12.0 [.]
QQuickItemPrivate::nextTabChildItem
5.77% plasmashell libQt5Quick.so.5.12.0 [.] 0x0000000000206bd6
3.93% plasmashell libQt5Quick.so.5.12.0 [.] QQuickItem::childItems
3.93% plasmashell libQt5Quick.so.5.12.0 [.]
QQuickItemPrivate::prevTabChildItem
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