https://bugs.kde.org/show_bug.cgi?id=416044
Bug ID: 416044
Summary: Increased Energy Consumption of kwin wayland with
active Screen Lock
Product: kwin
Version: 5.17.5
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: m...@rainer-finke.de
Target Milestone: ---
I measured today the energy consumption on a AMD APU and experienced an
increased energy consumption of kwin during an active screen lock. In my case
the system consumed idle on the desktop 11 Watt (Wayland), but as soon as the
lock screen kicks in, the system consumes continuously 13,5 Watt. Even if the
screen is turned off, the energy consumption is with 12,5 Watt still higher
than on an idle desktop.
If I open htop with ssh and look at the CPU% of kwin_wayland, it is on the
desktop more or less idle (mostly at 0%), but with the lock screen it is at 5%
and with the monitor turned off at 2%.
STEPS TO REPRODUCE
1. Open Plasma (Wayland)
2. Wait until the screen is locked
OBSERVED RESULT
- Increased energy consumption
EXPECTED RESULT
- Same or less energy consumption
Operating System: Arch Linux
KDE Plasma Version: 5.17.5
KDE Frameworks Version: 5.65.0
Qt Version: 5.14.0
Kernel Version: 5.4.8-arch1-1
OS Type: 64-bit
CPU: AMD Ryzen 3 2200G
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