|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>|
|Severity:||normal||CC:||filipfila.kde, kde, mail, nate, nortexoid|
|Latest Commit:||https://invent.kde.org/plasma/plasma-workspace/commit/c48eda8b2a44dfa2a8e44e81874571e375117040||Version Fixed In:||6|
cpu usage before qsvgstyle to be installed
cpu usage after qsvgstyle to be installed
Description Patrick Silva 2020-02-18 23:22:05 UTC
Comment 1 Filip Fila 2020-02-19 19:54:47 UTC
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
Comment 2 Nate Graham 2020-02-20 23:55:09 UTC
Also cannot reproduce.
Comment 3 Michael D 2020-04-06 06:38:27 UTC
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.
Comment 4 Patrick Silva 2020-04-06 13:19:44 UTC
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
Comment 5 Patrick Silva 2020-04-06 13:20:15 UTC
Created attachment 127323 [details] cpu usage after qsvgstyle to be installed
Comment 6 Kai Uwe Broulik 2020-04-06 14:42:27 UTC
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.
Comment 7 Bug Janitor Service 2023-01-26 12:02:42 UTC
A possibly relevant merge request was started @ https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/2543
Comment 8 Fushan Wen 2023-01-30 17:49:44 UTC
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