[Bug 19702] i5-450M CPU gets stuck in low/lowest state

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https://bugzilla.kernel.org/show_bug.cgi?id=19702





--- Comment #17 from Thomas Renninger <trenn@xxxxxxx>  2010-10-15 19:36:59 ---
If someone wants to test whether this has to do with intel_idle driver you
should be able to check the used driver (new intel_idle vs acpi_idle):
cat /sys/devices/system/cpu/cpuidle/current_driver

The new cpupowerutils (former cpufrequtils) show this via:
cpuidle-info

If intel_idle is used the boot param:
intel_idle.max_cstate=0
should make the machine fall back to acpi_idle...
Just an idea..., idle driver sounds possibly related to wrong idle
accounting... and this is an easy check compared to compiling/bisecting...

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