Re: repeatable malfunction on second resume

On Wed, 10 Oct 2007, Oliver Neukum wrote:

> Hi,
> 
> when I autoresume my cell phone for the second time, I get an error such
> as this:
> 
> Oct 10 15:01:52 oenone kernel: usb 1-4.2: usb auto-suspend
> Oct 10 15:02:12 oenone kernel: usb 1-4.2: usb auto-resume
> Oct 10 15:02:12 oenone kernel: usb 1-4.2: finish resume
> Oct 10 15:02:12 oenone kernel: usb 1-4.2: link qh16-1c02/ffff810037ca38c0 start 15 [1/2 us]
> Oct 10 15:02:12 oenone kernel: usb 1-4.2: unlink qh16-1c02/ffff810037ca38c0 start 15 [1/2 us]
> Oct 10 15:02:15 oenone kernel: usb 1-4.2: usb auto-suspend
> Oct 10 15:02:19 oenone kernel: usb 1-4.2: usb auto-resume
> Oct 10 15:02:19 oenone kernel: usb 1-4.2: finish resume
> Oct 10 15:02:19 oenone kernel: ehci_hcd 0000:00:02.2: devpath 4.2 ep0in 3strikes
> Oct 10 15:02:19 oenone kernel: usb 1-4: clear tt buffer port 2, a8 ep0 t00080248
> Oct 10 15:02:19 oenone kernel: usb 1-4.2: gone after usb resume? status -71
> Oct 10 15:02:19 oenone kernel: usb 1-4.2: can't resume, status -71

I tried doing the same thing manually, with a low-speed device (a
mouse) attached through a high-speed hub.  It worked fine for several 
suspend-resume cycles.

As Dave says, the problem here may be in the phone -- or it may be in 
the hub.  What happens if you plug the phone directly into the 
computer?  What happens if you plug a different full- or low-speed 
device into the hub?

Alan Stern


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