Am Donnerstag, 17. April 2008 23:47:27 schrieb Paulius Zaleckas:
quoted text
> Oliver Neukum wrote:
> > can you test this one as well. The method used to determine whether
> > a device is asleep is racy. This introduces a private test.
> 
> Stupid question :) How to test it? How can I force it to suspend?
> I have never used any suspend on my PC :)

This is runtime power management. It can save energy on any computer.
You compile your kernel with CONFIG_USB_SUSPEND and to see something
in syslog with CONFIG_USB_DEBUG.
Plug in the device, locate its sysfs directory, cd into it and do
echo "auto" >power/level

After a few seconds of idleness the device and the hub it's connected to
(if it's the only device at that hub) should suspend. You'll get a message
about it in the kernel log.

	Regards
		Oliver
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html