[ltp] Re: Fingerprint Reader -> USB -> no C3

[Rolf Kutz]

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On 25/02/08 10:57 +0100, Florian Reitmeir wrote:
>On Sun, 24 Feb 2008, Stefan Monnier wrote:
>
>> > hw.thinkpad_fingerprint true -> disable the reader
>> > hw.thinkpad_fingerprint false -> enable the reader
>>=20
>> Thanks: now I got my T60 down to 13W again!  It makes a 2W difference
>> almost.  But in my case (Debian stock 2.6.23 kernel) putting it in
>> "auto" works as well as putting it in "suspend".  Don't know why it
>> isn't in "auto" in the first place since all the USB power settings in
>> the /sys files seem to indicate that it's all in "autosuspend" mode.
>
>the problem is, the kernel people did change the autosuspend policy in the
>kernel .. while the core usb is autosuspend enabled, IMHO the devices are =
now
>on a white/backlist for autosuspend (i didn't look into the kernel code)
>
>i did notice the problem because every time regardless of my config powert=
op
>suggested to "enable autosuspend" for usb.. and after applying the CPU did=
 C3
>again... and i really do not need the reader :-)

What version of Powertop? 1.8 hat a bug that
caused this.

regards, Rolf

--=20
I si para prop 10

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