| Summary: | "Application style" kcm causes high cpu usage if third-party styles are installed | ||
|---|---|---|---|
| Product: | [Applications] systemsettings | Reporter: | Patrick Silva <bugseforuns> |
| Component: | kcm_style | Assignee: | Plasma Bugs List <plasma-bugs> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | filipfila.kde, kde, mail, nate, nortexoid |
| Priority: | NOR | Keywords: | triaged |
| Version: | 5.26.90 | ||
| Target Milestone: | --- | ||
| Platform: | Arch Linux | ||
| OS: | Linux | ||
| Latest Commit: | https://invent.kde.org/plasma/plasma-workspace/commit/c48eda8b2a44dfa2a8e44e81874571e375117040 | Version Fixed In: | 6 |
| Sentry Crash Report: | |||
| Attachments: |
screenshot
cpu usage before qsvgstyle to be installed cpu usage after qsvgstyle to be installed |
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Can't reproduce, tried sidebar mode, icon view, and standalone kcm in X11. Operating System: Manjaro Linux KDE Plasma Version: 5.18.1 KDE Frameworks Version: 5.67.0 Qt Version: 5.14.1 Also cannot reproduce. Can reproduce depending on what themes are installed. After installing qsvgstyle from AUR the kcm causes over 100% CPU usage in top. Removing qsvgstyle and its themes brings the CPU usage back to normal. Created attachment 127322 [details] cpu usage before qsvgstyle to be installed qsvgstyle s not installed on my Arch Linux. I have just installed it on Neon unstable and now such system is also affected. Compare the attached screenshots. https://github.com/DexterMagnific/QSvgStyle Operating System: KDE neon Unstable Edition KDE Plasma Version: 5.18.80 KDE Frameworks Version: 5.69.0 Qt Version: 5.14.1 Created attachment 127323 [details]
cpu usage after qsvgstyle to be installed
Can confirm with the style. It appears to be in a repaint loop. We get a UpdateRequest, schedule a repaint, render the widget, which somehow gives us another UpdateRequest and then we're in a loop. It doesn't happen when I don't have a HBox/VBoxLayout on the widget preview but other than that I have no idea what's going on in that style. A possibly relevant merge request was started @ https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/2543 Git commit c48eda8b2a44dfa2a8e44e81874571e375117040 by Fushan Wen. Committed on 30/01/2023 at 17:48. Pushed by fusionfuture into branch 'master'. kcms/style: suppress update requests from preview widget When mouse is not above a preview item, set the update interval to 1s. FIXED-IN: 6 M +29 -1 kcms/style/previewitem.cpp M +4 -0 kcms/style/previewitem.h https://invent.kde.org/plasma/plasma-workspace/commit/c48eda8b2a44dfa2a8e44e81874571e375117040 |
Created attachment 126146 [details] screenshot SUMMARY As we can see in the attached screenshot, "Application style" kcm uses ~30% of my cpu. It occurs on both X11 and Wayland sessions. Operating System: Arch Linux KDE Plasma Version: 5.18.1 KDE Frameworks Version: 5.67.0 Qt Version: 5.14.1 Kernel Version: 5.5.4-arch1-1 OS Type: 64-bit Processors: 2 × Intel® Celeron® CPU G1820 @ 2.70GHz Memory: 7,7 GiB of RAM