Tested, and if anything the %CPU of kworker threads is even higher, often staying around 65% in 'top'.
An easy way to get the screen to update is to run glxgears, which should run at screen refresh rate with very low CPU usage. ** Tags added: kernel-bug-exists-upstream ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1744543 Title: Screen updating with Compiz causes high-CPU kworker thread in 4.13 or earlier To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1744543/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs