Comment 12 for bug 1389077

Hi William,
How is your GPU temperature when this happens? Btw, as a more permanent temporary fix than rmmod you can blacklist it by creating the file /etc/modprobe.d/blacklist-intel_powerclamp.conf and adding the line "blacklist intel_powerclamp" to it.

As for my problem, I think it's a bit counter-intuitive that powerclamp starts to inject idle time when it's the *GPU* that is hot and using 50% of the CPU for this idle stuff almost right away is certainly excessive. It also takes a really long time after the temp has gone down for powerclamp to stop and during this time the system is very sluggish.
I have to say, it seems this is not working as it should.