Hi, I have a dell 1564 laptop with an i5-M430 cpu, running arch linux. For a long while now I've had issues with very degraded CPU performance if my cpu temperature is very hot till around ~95 degree Celsius. The problem is that the degraded cpu performance stays inspite of cooling down back to 60 degrees, and even multiple suspend-resume cycles. The only way to reset the same is a reboot. I can't seem to track down the cause of this. The cpu frequency etc. look normal, all 4 vitual-cpu's are active from cpuinfo. top reports nearly 5x increased % cpu usage for process compared to what they normally use. Some simple CPU benchmarks (N-Queens) also take approximately 5 times longer. I'm using kernel: 3.14.6-1-ARCH 64bit Can you suggest some ways to track down this issue? or alternatively a way to reset this so that I don't need to reboot to restore performance. The issue is reproducable (I just need to use the CPU at max, for a while to overheat it), so I can provide any logs etc. if it will help to find the cause. I also previously posted with some more details on https://bbs.archlinux.org/viewtopic.php?id=183236 without any response.
