[Bug 80651] New: [intel_pstate] pstate settings are lost during suspend/resume cycle

https://bugzilla.kernel.org/show_bug.cgi?id=80651

            Bug ID: 80651
           Summary: [intel_pstate] pstate settings are lost during
                    suspend/resume cycle
           Product: Power Management
           Version: 2.5
    Kernel Version: 3.15.6
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: cpufreq
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Created attachment 143431
  --> https://bugzilla.kernel.org/attachment.cgi?id=143431&action=edit
dmesg output

Hello,

the patches that went into 3.15.6 made the intel_pstate driver finally useable
for me. At least as long as I don't suspend/resume the system.

After resume the multiplicator is locked to the highest one. I have to change
min_perf_pct and max_perf_pct to some other values and then back to restore the
behaviour before the suspend.

CPU is a Haswell / i7-4700HQ.

With best wishes,
Tobias

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