I'm a bit surprised nobody reported this yet. It bothers me since months, but I can't really tell exactly from which Frameworks version. STEPS TO REPRODUCE 1. Open Google Chrome (my version is 75.0.3770.90, but any version will do) 2. go to a page where you can download a large file (e.g. https://download.qt.io/official_releases/qt/5.12/5.12.3/) 3. download a >1GB file 4. Enjoy your CPU going at 100% just to show a green bar progressing 5. (bonus) Enjoy your laptop ventilation going crazy for the whole download duration OBSERVED RESULT CPU cores going @100% EXPECTED RESULT A network download must not bother a CPU at all. There is clearly a bug in the notification system (in particular the progress bar system) where someone forgot to add a sleep call when polling the download progress. SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Neon KDE Plasma Version: 5.16 KDE Frameworks Version: 5.59.0 Qt Version: 5.12.3
For the record, the process eating up all the CPU is plasmashell.
Are you using plasma-browser-integration?
Please provide output of QSG_INFO=1 plasmashell --replace (just the first 20 lines or so) During download can you run "dbus-monitor" and capture the sample of a few seconds
marking as needsinfo
Created attachment 120980 [details] plasmasheel log
Created attachment 120981 [details] dbus-monitor log
> Are you using plasma-browser-integration? Yes, 5.16.0 Requested logs attached.
Didn't reveal much. Animation driver was synced correctly. DBus rate was once per second which is sane. Next steps: - if you remove klipper does that fix anything? - if you remove the notification widget does that fix anything?
Edit, ignore the comment about klipper. If it is the bug I'm thinking of then changing klipper won't fix anything.
Which one is the notification widget and how do I remove it?
Right-click the system tray expander arrow > Configure System Tray > General Tab > Extra Items > Notifications checkbox
Without notifications, CPU usage is definitely at normal levels
I get the same problem. I can resolve the notification stuff but the Networkmanager applet is creating high cpu when connecting.
Looks like an old issue. Setting it to needs more info. Please try with a newer version(plasma 5.23.5) and if this is not an issue any more let us know. Bugs placed into NEEDSINFO status will receive a reminder if the ticket: Is at least 15 days old Has not received any comment within 15 days If a bug remains in NEEDSINFO for another 15 days with no comment, it will be closed as RESOLVED > WORKSFORME. If a bug remains in NEEDSINFO with a comment provided within less than 15 days, no action will be taken (as it does not meet the above criteria).
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!