Re: [0000/0003]full power management for usb touchscreens

[Ondrej Zary <linux@rainbow-software.org>]

On Friday 18 June 2010, Oliver Neukum wrote:
> Am Freitag, 18. Juni 2010 20:34:03 schrieb Ondrej Zary:
> > On Friday 18 June 2010 20:22:07 Oliver Neukum wrote:
> > > Am Donnerstag, 10. Juni 2010 16:13:51 schrieb Ondrej Zary:
> > > > > > I haven't tested the patches before. Now I tested them and the
> > > > > > Nexio touchscreen does not play well with suspend. It always
> > > > > > reconnects after resume from STR or hibernation. Autosuspend is
> > > > > > probably never activated at the URBs are submitted continuously.
> > > > >
> > > > > I see. Can you compile with CONFIG_USB_DEBUG and send me the log?
> > > >
> > > > This can't be fixed - no matter what you do, the device reconnects if
> > > > you stop talking to it.
> > >
> > > Have you tried setting it back to config 0?
> >
> > No, I haven't. It reconnects even if there's no driver loaded (e.g. older
> > kernel). I don't know if kernel sets configuration on all USB devices
> > upon connect (even if there's no driver).
>
> Yes, the kernel sets a configuration if the power budget allows it.
> You can set it back to 0 through sysfs and see what happens.

It disconnects and reconnects after bConfigurationValue is set to 0.

-- 
Ondrej Zary