https://bugs.kde.org/show_bug.cgi?id=496875
Bug ID: 496875
Summary: System Monitor constantly redraws until History page
is viewed/loaded the first time
Classification: Applications
Product: plasma-systemmonitor
Version: 6.2.3
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: ksysguard-b...@kde.org
Reporter: flupp+bugs.kde....@mailbox.org
CC: ahiems...@heimr.nl, plasma-b...@kde.org
Target Milestone: ---
System Monitor constantly redraws until the History page is viewed the first
time. Afterwards, redrawing is only done when necessary (e.g., when updating
the graphs) regardless of the shown page.
To see the redraws, enable the “Show Paint” KWin desktop effect. The constant
redrawing is noticeable as flickering.
When a page is loaded the first time, a spinning cog is animated to indicate
the loading process. Consequently, this causes a flickering “Show Paint”
effect. However, the flickering does not stop until the History page is
loaded/shown the first time. Until then, it feels as if the cog continues
spinning invisibly in the background.
On a system with low graphics power and 4k monitor, the load caused by the
excessive redraws can actually be noticeable in other applications, which feel
less responsive then. With a maximized System Monitor window in the background,
hover effects in, e.g., Firefox lag behind mouse movements. The lagging stops
when the History page is viewed the first time or the System Monitor window is
minimized or closed.
Potentially related bugs:
Bug 434877: System Monitor has high idle CPU usage
Bug 488440: System Monitor has unusually high GPU usage
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.2.3
KDE Frameworks Version: 6.8.0
Qt Version: 6.8.0
Kernel Version: 6.12.1-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i5-8250U CPU @ 1.60GHz
Memory: 15,4 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620
Manufacturer: LENOVO
Product Name: 20L50000GE
System Version: ThinkPad T480
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