https://bugs.kde.org/show_bug.cgi?id=403783
Bug ID: 403783
Summary: Laptop running Plasma slows down when 2nd monitor is
plugged in via HDMI
Product: plasmashell
Version: 5.14.5
Platform: Ubuntu Packages
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: general
Assignee: k...@davidedmundson.co.uk
Reporter: techxga...@outlook.com
CC: plasma-b...@kde.org
Target Milestone: 1.0
Created attachment 117748
--> https://bugs.kde.org/attachment.cgi?id=117748&action=edit
Screenshot of KSysGuard with montor plugged in via HDMI
SUMMARY
A laptop running Plasma slows down significantly when a secondary monitor is
plugged in via HDMI. Doesn't seem to slow down when plugged in via VGA.
STEPS TO REPRODUCE
1. Plug the the monitor to the laptop via HDMI
2. You'll notice the sluggish performance immediately
3.
OBSERVED RESULT
Clock frequency stays at <1GHz most of the time.
EXPECTED RESULT
Performance shouldn't degrade
SOFTWARE/OS VERSIONS
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version: 5.14.5
KDE Frameworks Version: 5.52.0
Qt Version: 5.11.1
ADDITIONAL INFORMATION
Intel Core i7-4510U
16GB RAM
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