I have recently encountered this problem again at my notebook. System info: plasmashell 5.5.5 OS: Kubuntu 16.04 Also, I have two (physical) monitors, and I noticed this problem began to arise after I detached/attached notebook from dock station or after hibernation
Backtraces, perf top: I ran "top -H" and it said there are two threads on my system, which are eating CPU - plasmashell and Xorg, so here is "hottest" backtraces of these threads collected with perf top -t 3136 -d 5 --call-graph dwarf (where 3136 is thread Id from top output) Thread of plasmashell - http://pastebin.com/GPMkrWz8 (see text after RAW Paste Data) Thread of Xorg - http://pastebin.com/ZH0x7F7i (see text after RAW Paste Data) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1435641 Title: plasmashell 100% cpu on screen lock To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plasma-workspace/+bug/1435641/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
