On Tuesday 11 June 2013 07:53:10 Morales, Alejandra wrote:
> 2013/6/10 Oliver Neukum <[email protected]>
> > You need to furthermore realise that there are forms of runtime PM
> > independent
> > of the generic kernel based runtime PM (hdparm, USB LPM, ...)
>
>
> Thanks Oliver, that was helpful. I will try now to do my testing using USB
> devices as it will likely be easier.
Note:
1. for most usb devices the default for runtime PM is off (powertop will help)
2. all a device's interface drivers must support it (look at the kernel source
for .supports_autosuspend = 1)
3. If you want the HCD to go to D3 you need ACPI 5.0
HTH
Oliver
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