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

[Nils Faerber]

Rolf Kutz schrieb:
> 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=1" >> /etc/modprobe.d/options
> 
> Then reload the usbcore.

Hmm... but checking the parameters file in /sys for usbcore gives me "2"
which should mean autosuspend enabled after 2 seconds idle. So it is
enabled?
Which would also mean that UHCI is broken compared to 2.6.22.

> regards, Rolf
Cheers
  nils faerber

-- 
kernel concepts GbR        Tel: +49-271-771091-12
Sieghuetter Hauptweg 48    Fax: +49-271-771091-19
D-57072 Siegen             Mob: +49-176-21024535
--