> [160549.977524] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 3^M > [160549.977528] hub 2-1:1.0: port 4, status 0100, change 0001, 12 Mb/s^M > [160549.977650] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 4^M > [160549.977652] usb 2-1.4: USB disconnect, address 3^M > [160549.977654] usb 2-1.4: unregistering device^M > [160549.977656] usb 2-1.4: unregistering interface 2-1.4:1.0^M > [160549.977772] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 5^M > [160549.977897] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 6^M > [160549.978020] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 7^M > [160549.978146] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 8^M > [160549.978269] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 9^M > [160549.978394] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 10^M > [160549.978519] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 11^M > [160549.978644] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 12^M > [160549.978770] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 13^M > [160549.978894] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 14^M > [160549.979018] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 15^M > [160549.979144] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 16^M > [160549.979269] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 17^M > [160549.979393] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 18^M > [160549.979517] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 19^M > [160549.979642] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 20^M > [160549.979768] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 21^M > [160549.979892] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 22^M > [160549.980016] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 23^M > [160549.980142] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 24^M > [160549.980266] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 25^M > [160549.980391] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 26^M > [160549.980516] ehci_hcd 0000:00:1d.0: detected XactErr len 0/4096 retry > 27^M > > > Regards, > Shaiju. > > > -----Original Message----- > From: Alan Stern [mailto:st...@rowland.harvard.edu] > Sent: Sunday, July 29, 2012 2:54 PM > To: shaiju shaiju > Cc: 'Sadasivan Shaiju'; 'Peter Chen'; 'USB list' > Subject: RE: usb device getting disconnected and connect back again. > > On Sun, 29 Jul 2012, shaiju shaiju wrote: > >> Hi Alen, >> >> This error is intermittent . It doesn't happen always . > > Then there may not be any way to determine the cause. Perhaps the > firmware in the USB device intermittently crashes. > If the host has some errors, such like the PHY work abnormal, it will also occur errors like this. It is hard to debug your problem, I suggestion try more boards and do more tests to see if it is single board issue or the issues for all boards.
> Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
