SUMMARY As for the summary, plasmashell constantly uses 100% of a cou STEPS TO REPRODUCE Don't know OBSERVED RESULT 100% cpu via top EXPECTED RESULT SOFTWARE/OS VERSIONS Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: kf5-plasma.x86_64 5.59.0-1.fc30 qt.x86_64 1:4.8.7-49.fc30 Note: this is a stock standard, up to date Fedora 30 system ADDITIONAL INFORMATION There are lots of items in a Google search regarding this bug. I have tried lots of them to no avail. It also appears to be a common problem over many years. Can we please fix this once and for all?
I can't do anything with the little information provided. Please try and get a report in hotspot Failing that run "sudo gdb --pid `pidof plasmashell` wait for it to attach and type "bt" - and paste the output here. Then type "continue" in that shell and repeat a few times. Please try and note some conditions when this occurs. New notification for example?
Firstly, brevity: sending from phone because hdd problems on laptop. Understand re lack of docs - didn't know what to provide. Further details after hdd replaced. Lastly, in this context, what is "hotspot"?
https://github.com/KDAB/hotspot
OK - will install hotfix when hdd replaced. Obviously no updates till then (early next week, hopefully - I live in a remote area)
Well, back on the air and, my, wasn't it fun rebuilding your machine back up from bare metal. But to business: 'hotspot' appears to me to be just a front-end to 'perf' - and it (hotspot) crashed when I tried to run the recording phase. It did, however, give me enough to run: # perf record -o perf.data --call-graph dwarf --aio --sample-cpu --mmap-pages 32M --pid 2201 ^C[ perf record: Woken up 94 times to write data ] [ perf record: Captured and wrote 1527.975 MB perf.data (189804 samples) ] (Note that perf crashes when you specify 1G to the --mmap-pages parameter.) That gave me 155GB of data. I then ran: $ perf report -g --children -i perf.data which produced a pretty output that _may_ be of use, see the attachment. Cheers, Kevin
Created attachment 121918 [details] Output from perf report
New information was added with comment #5; changing status for inspection.
Deadlock resizing some text. We did have a report of this happening with notification popups that should be gone with Plasma 5.16 Please reopen if it's an issue.