[ltp] Re: X60 - (bad) experience, others?

Rolf Kutz linux-thinkpad@linux-thinkpad.org
Thu, 7 Feb 2008 22:18:49 +0100


--xo44VMWPx7vlQ2+2
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On 07/02/08 11:54 -0500, Stefan Monnier wrote:
>>> I basically found the guilty: uhci_hcd!
>>> The strange thing is that auto-suspend is enabled (and also on all
>>> devices) and that I did not have to remove it for getting 9.5W with
>>> 2.6.22. So something from 2.6.22 -> 2.6.24 changed in uhci_hcd and the
>>> change was not good, i.e. causing the CPU not entering C3 in 70-80%.
>>> Again, this was not necessary with 2.6.22...
>
>> IIRC auto-suspend for USB was disabled per default in 2.6.23 because it
>> broke too many devices.
>
>Ahhh.... is that what happens?  How do I turn it back on?

# echo "options usbcore autosuspend=3D1" >> /etc/modprobe.d/options

Then reload the usbcore.

regards, Rolf

--=20
=2E..about the greatest democrazy in the world.

--xo44VMWPx7vlQ2+2
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: Digital signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)

iD8DBQFHq3W4+ZqCAlXyvMsRAkyTAJoCFnYsbLmtsGPF2BqqoWAgI9dfQgCbBF4U
/jx7FMhLWBIeum0TzNYlU3Y=
=TbVP
-----END PGP SIGNATURE-----

--xo44VMWPx7vlQ2+2--