Re: [RFT] usbcore: Bug fix: system can't suspend with USB3.0 device connected to USB3.0 hub

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----- Original Message -----
> On Tue, Apr 12, 2011 at 04:34:10PM -0400, CAI Qian wrote:
> > > If auto-suspend is working properly, you
> > > should
> > > see messages like:
> > >
> > > "usb 9-1: usb auto-suspend"
> > Yes, there was a message there.
> >
> > kernel: usb 9-1.2: usb auto-suspend
> 
> Ok, will you please try the patch Alan sent (the one that removes the
> can_submit check). I am able to reproduce this with Linus' latest
After applied this patch on the top of the 5 patches, it is now working.
Awesome! Thanks!

CAI Qian
> tree,
> and a Pluggable USB 3.0 hard drive dock attached to a Buffalo USB 3.0
> hub. It's odd that the system is allowed to hibernate the first time,
> since I don't have any of Andiry's patches for USB 3.0 hub suspend
> enabled (either the 5 patches, or the port power off workaround).
> 
> What I notice is that after the first hibernate, the drive seems to be
> there, but when I browse folders, they are all empty. When I run
> lsusb,
> the hard drive is not connected, and dmesg shows lots of errors from
> the
> block layer, so it looks like the drive disconnected during the
> hibernate. When I try to hibernate a second time (without unplugging
> the drive and replugging it in), the system refuses to hibernate.
> 
> I don't have a serial port, so I can't get messages from the second or
> third parts of the hibernate (thank you Alan for the very complete
> explanation). I'm not able to tell if the hibernate issue is exactly
> the same cause as yours, but it does look similar. I'll test with
> Alan's patch and see if it helps.
> 
> Sarah Sharp
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