On Thu, Apr 19, 2012 at 02:07:47PM -0400, Alan Stern wrote:
> > > Below is a patch that will prevent any PCI device from being put into
> > > D3 during suspend.  (This is meant to be used without any of the
> > > earlier diagnostic patches.)  Obviously it's not the final solution; 
> > > the test in the "if" statement needs to be more discriminating.  :-)
> > > 
> > > But before going any farther, I'd like to test if USB wakeup works.  
> > > So after booting with this patch, make sure that the power/wakeup file
> > > says "enabled" in the sysfs path for each controller as well as the
> > > usb1, usb2, 1-2, and 2-2 paths under /sys/bus/usb/devices/.
> > > 
> > > Then suspend the computer without using the script, and while it is
> > > asleep try plugging in a new USB device.  That should cause the
> > > computer to wake up, if everything is working properly.
> > I've set "enabled" for following files:
> > 
> > /sys/bus/usb/devices/usb1/power/wakeup
> > /sys/bus/usb/devices/usb2/power/wakeup
> > /sys/bus/usb/devices/1-1/power/wakeup
> > /sys/bus/usb/devices/2-1/power/wakeup
> > /sys/bus/pci/devices/0000:00:1a.0/power/wakeup
> > /sys/bus/pci/devices/0000:00:1d.0/power/wakeup
> 
> Good.
> 
> > yet it didn't wake up after plugging, though devices light up.
> 
> You mean, the devices that you plug in light up?
Yes. An mp3 player and a flash drive.

> I'd like to see the dmesg log for the complete suspend/resume cycle 
> (naturally you'll have to resume the system by hand after plugging in 
> the USB device).  Make sure that CONFIG_USB_DEBUG is enabled.
Attached.


-- 
WBR, wRAR