Messages in this thread | | | Date | Tue, 25 Feb 2014 18:48:58 -0800 | From | Andy Lutomirski <> | Subject | Re: intel_pstate: Haswell i7-4600M refuses to enter lower Package States |
| |
On 02/20/2014 04:29 AM, Dieter Mummenschanz wrote: > Hello, > > on my Lenovo T440p Laptop the Haswell i7-4600M CPU refuses to enter lower PC states resulting in 14-15 Watts continuous power drain even if the system is idle and every tunalbes in powertop 2.5 are enabled. The issue is reproducable with Kernel versions 3.13 up to 3.14-rc3. > > Did anyone else experience a similar issue?
Something's confused here. Do you mean P-states (i.e. performance states or "frequency" settings) or PC-states (i.e. "package C-states")? I suspect that you mean the latter, in which case intel_pstate has nothing to do with the problem.
The relevant diagnostic is the output from turbostat.
--Andy
| |