https://bugs.kde.org/show_bug.cgi?id=510402
Bug ID: 510402
Summary: On a lower end machine (Raspberry Pi 5) the Icons-Only
Task Manager's performance when hovering the icons
seems surprisingly poor even with thumbnail preview
disabled
Classification: Plasma
Product: plasmashell
Version First 6.4.5
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Task Manager and Icons-Only Task Manager widgets
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: 1.0
Created attachment 185613
--> https://bugs.kde.org/attachment.cgi?id=185613&action=edit
An annotated screenshot showing the row of icons I was sliding the mouse cursor
across
SUMMARY
On a lower end machine (Raspberry Pi 5) the Icons-Only Task Manager's
performance when hovering the icons seems surprisingly poor. When just moving
the mouse over the icons slowly, left to right and back, there is extreme lag
for the popups for each program, to the point where the entire hardware mouse
cursor lags and briefly gets stuck.
Now you would think this is because of the previews or something, but it
doesn't seem to be: I disabled all previews, all media controls, all bringing
windows to the front, basically everything except a basic text popup that
simply says the program name and lists the amount of windows with zero visual
details.
Yet, the extremely bad performance remains. I feel like on a 1.5Ghz+ machine,
no matter how low end that is nowadays, showing a simple text popup when
hovering a small list of icons shouldn't possibly take that much effort.
Therefore, it seems like something isn't working correctly here. My apologies
if somehow this is intended and the expected performance.
STEPS TO REPRODUCE
1. Go into the icons-only settings and disable everything that could possibly
be slow
2. Use a slow-ish low end machine like a Raspberry Pi 5
3. Simply hover the mouse over the icons going left to right and back, and
watch the popups lag surprisingly.
OBSERVED RESULT
Unexplained pretty noticeable and bad lag. The web browser itself that I'm
using here to type has no stutter problems, so it's not a general system issue
I don't think.
EXPECTED RESULT
Popups show up with no delay and mouse cursor doesn't stutter.
SOFTWARE/OS VERSIONS
Windows:
macOS:
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: pmOS Edge based on Alpine Edge
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.18.0
Qt Version: 6.9.2
ADDITIONAL INFORMATION
This is a low end Raspberry Pi 5. However, the browser is smooth.
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