Turning off monitor causes permanent CPU spike

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Dzisk
Posts: 1
Joined: 2014/10/30 12:33:42

Turning off monitor causes permanent CPU spike

Post by Dzisk » 2014/10/30 12:53:44

Im running CentOS 7 and I have a monitor connected via display port.

Whenever i turn off the monitor a kworker thread spikes to 100% cpu and theres no killing it or fixing it, slowing it to a crawl

What I've tried so far:
-booting into runlevel 3 didnt help, same problem
-turning off acpi in the grub boot config does fix the problem but then the monitor config doesnt get detected and the display comes up in 800x600

I dont know anything about how acpi works, is there a way to disable just anything that deals with the monitor?
I'd also be fine with keeping acpi off and figuring out the monitor resolution stuff.

Anyone run into this before?

Dave

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