Comment 8 for bug 1504584

Additional information:

After the first resume from suspend, the processor is in a bizarre state, where it will not go below 2.4 GHz, even though every CPU is asking for a pstate of 16 (the minimum for my processor). This has been tested several times, on both the preceding (good) and first bad kernels using both methods of suspend.

My processor: Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz

Example (no load):

pstate being asked for:

# rdmsr --bitfield 15:8 -d -a 0x199
16
16
16
16
16
16
16
16

pstate that I am getting:

# rdmsr --bitfield 15:8 -d -a 0x198
24
24
24
24
24
24
24
24

CPU freqs:

# grep MHz /proc/cpuinfo
cpu MHz : 2400.054
cpu MHz : 2399.921
cpu MHz : 2399.921
cpu MHz : 2399.921
cpu MHz : 2399.789
cpu MHz : 2399.789
cpu MHz : 2399.921
cpu MHz : 2399.921