Ubuntu kworker thread consumes 100% CPU [closed]

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I had a question and was unable to find the answer (easily). On my Ubuntu installation, a kworker thread was consuming 100% CPU, which coused my computer to be very slow or crash at times.

Answer 1

EDIT 5:

In the end it seemed that my NVIDIA card was actually not working correctly. I sent it back and got a new one... :S

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The problem was a nouveau conflict (or something) between my onboard videocard and the NVidia videocard. In the BIOS I disabled the onboard card, which solved the problem.

EDIT:

I also disabled XHCI now.

EDIT 2:

https://askubuntu.com/questions/33640/kworker-what-is-it-and-why-is-it-hogging-so-much-cpu

EDIT 3:

Still having problems. Guessing it has something to do with screen blanking. Going to try to do

xset s noblank;xset s 0 0;xset s off; xset -dpms

EDIT 4:

This seems to work. I put it in ~/.profile now (so that it is done on startup).

Answer 2

If you run the command:

grep . -r /sys/firmware/acpi/interrupts/

and check for any high value like:

/sys/firmware/acpi/interrupts/sci:     264
/sys/firmware/acpi/interrupts/error:       0
/sys/firmware/acpi/interrupts/gpe00:     264   enabled
/sys/firmware/acpi/interrupts/gpe01:       0   invalid
...
/sys/firmware/acpi/interrupts/gpe1F:       0   invalid
/sys/firmware/acpi/interrupts/sci_not:       0
/sys/firmware/acpi/interrupts/ff_pmtimer:       0   invalid
/sys/firmware/acpi/interrupts/ff_rt_clk:       0   disabled
/sys/firmware/acpi/interrupts/gpe_all:     265
/sys/firmware/acpi/interrupts/ff_gbl_lock:       0   enabled
/sys/firmware/acpi/interrupts/ff_pwr_btn:       0   enabled
/sys/firmware/acpi/interrupts/ff_slp_btn:       0   invalid

backup your file

cp /sys/firmware/acpi/interrupts/gpe00 /root/gpe00.backup

and simply disable it:

echo "disable" > /sys/firmware/acpi/interrupts/gpe00

You have here the complete solution:

https://askubuntu.com/questions/176565/why-does-kworker-cpu-usage-get-so-high