No C3 on Pentium M (Dothan)

No C3 on Pentium M (Dothan)

[Sascha Kloss]

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Hello acpi-folks,

I have some problem with my new FSC Amilo M6453G equipped with an
Pentium M Dothan 1.6GHz.

As the subject already says, my processor only seems to offer the
C-States one and two.

Kernel log says:
ACPI: CPU0 (power states: C1[C1] C2[C2])

Then I found your Wiki on using the C3 sleep state and looked for
busmastering support. Strangely, my cpu seems not to support it :(

# cat /proc/acpi/processor/CPU1/info
processor id:            0
acpi id:                 1
bus mastering control:   no
power management:        yes
throttling control:      yes
limit interface:         yes

So how could this be? I don't think there pentium m's out there with no
C3 support. Could a errorous DSDT cause wrong reporting of available
C-States?

I've also noticed that my notebook's cpu is warmer when idling in linux
than in windows - could the C3-state cause this?

Thanks in advance to anyone replying.
... and sorry for my bad english ;)

Kind regards
 Sascha Kloß

Kernel: 2.6.15-gentoo-r1
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