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
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https://bugs.launchpad.net/bugs/1744543
Title:
Screen updating with Compiz causes high-CPU kworker thread in 4.13 or
earlier
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