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 -- You are receiving this mail because: You are watching all bug changes.