On 12:37 Sat 07 Mar 2009, Alan Stern wrote:
> On Sat, 7 Mar 2009, Brandon Philips wrote:
> > On 21:26 Fri 06 Mar 2009, Greg KH wrote:
> > > On Fri, Mar 06, 2009 at 11:11:22AM -0800, Brandon Philips wrote:
> > > > When an UVC device is open and a S4 is attempted the thaw hangs (see the
> > > > stack below). I don't see what the UVC driver is doing wrong to cause
> > > > this to happen though.
> > >
> > > I don't think this is a uvc driver issue, it looks like all you are
> > > trying to do is a usb control message when things hang.
> >
> > Indeed. When I was poking at this I tried to supress the control message
> > coming
> > out of the uvcvideo driver after the suspend was issued to see what would
> > happen and the control messages after the resume locked up instead. Eh.
>
> Have you tried suspending just the two devices plugged into that EHCI
> controller instead of suspending the entire system? That would make it
> a lot easier to carry out testing.
I tried to reproduce with s2ram suspend, echo suspend >
/sys/bus/usb/devices/.../power/level and /sys/power/pm_test levels but none of
them reproduced it. So, at this point the only way I can reproduce this is with
a full S4.
Is there some other method I missed of testing?
Thanks,
Brandon
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