This issue affects me on Ubuntu Bionic 18.04 if I have a Firefox window
open with a frequently changing title bar. It seems that plasmashell
cannot keep up with re-rendering the label on the task bar buttons. The
specific Firefox operation that triggers it for me is using the HTML5
iKVM on a Supermicro server where the title is constantly updating with
the FPS of the video connection.
plasma-workspace:
Installed: 4:5.15.4-0ubuntu1
Candidate: 4:5.15.4-0ubuntu1
Version table:
*** 4:5.15.4-0ubuntu1 500
500 http://gb.archive.ubuntu.com/ubuntu disco/universe amd64 Packages
100 /var/lib/dpkg/status
** Tags added: disco
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https://bugs.launchpad.net/bugs/1597792
Title:
plasmashell high CPU usage (100%+)
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