The CPU seems taken by Xorg (see screen shot). When the gnome-shell proc take most of the CPU, the overall CPU seems to be reduced after some seconds.
** Attachment added: "TOP result" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1773502/+attachment/5144559/+files/Capture%20d%E2%80%99%C3%A9cran%20de%202018-05-26%2010-06-11.png -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1773502 Title: High CPU usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1773502/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
