https://bugs.kde.org/show_bug.cgi?id=452689
Bug ID: 452689
Summary: plasma-systemmonitor is missing a KInfoCenter Memory
Module replacement
Product: plasma-systemmonitor
Version: 5.24.3
Platform: Manjaro
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: ksysguard-b...@kde.org
Reporter: polarathene-sig...@hotmail.com
CC: ahiems...@heimr.nl, plasma-b...@kde.org
Target Milestone: ---
SUMMARY
Original issue source:
https://www.reddit.com/r/kde/comments/u4rav6/kinfocenter_memory_module_replacement/
[This page from
KInfoCenter](https://forum.manjaro.org/t/why-are-htop-and-system-monitor-showing-different-memory-usages/72984/19)
appears to have been [dropped with Plasma
5.24](https://github.com/KDE/kinfocenter/commit/c529b9d4074bf4b545372ccd1d3ac9acdfdc10c8)?
The commit dropping it states System Monitor installs an "external module
service" as a replacement for that view. All I see in System Monitor is a
single "Memory" block in the "Overview" page, or the graph in "History" page.
It is unclear how to get access to such a view via System Monitor, beyond
expecting the user to re-create the page or rely on a third-party solution via
"Get New Pages".
STEPS TO REPRODUCE
1. Attempt to locate a view in System Monitor that provides the same
information breakdown as KInfoCenter Memory Module once did pre-Plasma 5.24.
2. Fail to locate an equivalent view.
OBSERVED RESULT
No equivalent view is provided/available, despite the commit implying "external
module service" in `plasma-systemmonitor` would cover the same functionality.
Unless the intention was "Tools => Launch Htop", but this does not provide the
same focused breakdown/overview specific to memory usage.
EXPECTED RESULT
Some officially maintained view either by default or enabled to provide the
same information.
Presently the "Shared Memory" and "Total Free Memory" (composite of two
sensors) is missing. As is some functionality for a compact stacked bar chart
(with text), or stacked horizontal bar.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: X11 with Kernel 5.15.28
KDE Plasma Version: 5.24.3
KDE Frameworks Version: 5.91.0
Qt Version: 5.15.3
ADDITIONAL INFORMATION
Attempting to DIY the Memory Module as a new page, I could not produce a
similar view.
- Text portion was truncating labels depending on width. Only supported
ordering, but not layout (eg single column), which further restricted label
width for "Text" widget/components.
- Stacked bar chart does not support inlining/embedding the labels+data.
- No composite sensor ("Total Free Memory" in KInfoCenter was a composite of
Total Physical and Total Swap available). Not available from sensor selection,
or any apparent way to composite multiple sensors into a single one.
- At this point I stopped trying to reproduce the view, presumably the rest is
possible with nested items.
Using "Horizontal Bars" display style with Text-Only sensors provides a
close-enough equivalent of the text section, but still truncates the full
labels of a certain length, despite ample room..? This is not an issue if using
regular sensors, which add actual bars, but these don't seem helpful.
With the horizontal bars drawn, the value shown for each sensor is the current
value, but the bar is drawn as a portion of that value to some range that is
specific to the sensor (or largest value of all sensors in the group rather?),
so it's not communicating much to a user (eg 100% full for "Total Physical
Memory" with a variable width beneath it for "Free Physical Memory", (no
"Shared Memory" sensor), and Disk Buffer/Cache likewise that could all be
stacked together as a single bar which is doable with Pie/Bar charts only, but
requires identifying a matching label by colour (no hover/interaction hinting).
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