Hi
Well the kernel developer asked for the users to test with the vanilla kernel, it appears they didn’t… so closed…
Use the vanilla kernel, re-open and post the info…
I just use what ever comes in the box. I don’t screw around with running special kernels.
I’m just posting here so that people in the future who Google for a solution and find this thread will see the history.
Just adding my 2 cents, since I witnessed the same problem on a Haswell CPU of mine.
Apparently the problem stems from the intel_pstate driver in kernel 4.4; things might have changed since kernel 4.5, personally I didn’t see this problem with kernels from 4.8.x to 4.11.x.
Apparently with this driver my CPU is happily going to idle (Cx states) without scaling down the frequency first; since I saw no other adverse effect from this behavior I stopped investigating.
The intel_pstate driver is the default for Sandy Bridge and later Intel processors, older chips should use the legacy acpi_cpufreq driver.
So if you see adverse effects, either install a later kernel or insert “intel_pstate=disable” in your boot command line.
If you need more accurate references, just search the web for “intel_pstate=disable”
HTH those finding this thread.
Hi,
I’ve just installed vanilla kernel and it RESOLVED THE PROBLEM.
I will inform on the site with bugs that this is a solution.
Regards.