On Wed, Dec 01, 2010 at 04:12:14PM +0100, Gerd Hoffmann wrote: > On 11/25/10 18:04, Marcelo Tosatti wrote: > >This patch enables USB UHCI global suspend/resume feature. The OS will > >stop the HC once all ports are suspended. If there is activity on the > >port(s), an interrupt signalling remote wakeup will be triggered. > > > >To enable autosuspend for the USB tablet on Linux guests: > > > >echo auto> /sys/devices/pci0000:00/0000:00:01.2/usb1/1-1/power/level > > Hmm, did you ever got this working sanely?
Yes. Linux and Windows. > /me sees bus disconnects in the guest ... I was seeing bus disconnects when not clearing port resume bit properly. > > port->ctrl&= ~(val& 0x000a); > >+ port->ctrl&= ~(port->ctrl& 0x0040); /* clear port resume > >detected */ > > } > > This chunk looks suspicious ... > > I suspect the port suspend/resume emulation isn't complete. > > /me goes debugging, > Gerd CONFIG_USB_DEBUG helps.
