On Mon, 28 Jan 2008, Oliver Neukum wrote:
> Hi,
>
> going through old mail
> http://kerneltrap.org/mailarchive/linux-kernel/2007/8/2/154987
>
> I was wondering what supported means in MS parlance. Is runtime
> pm done for these devices by default or does it mean that the driver
> can do it and it'll be only done for whitelisted devices?
According to Microsoft's FAQ at
http://www.microsoft.com/whdc/system/bus/USB/USBFAQ_intro.mspx
it varies from driver to driver. For example, the FAQ says that to
enable selective suspend for HID devices you must explicitly add a
registry entry specifying the device's VID and PID. The hub and serial
drivers don't seem to have any comparable requirements.
The FAQ also talks about remote wakeup problems caused by BIOS errors!
Obviously Linux isn't the only OS to suffer from this sort of thing...
Alan Stern
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