On Thu, 21 Jan 2010, Greg KH wrote: > > ehci_hcd 0000:00:1d.7: port 5 high speed > > ehci_hcd 0000:00:1d.7: GetStatus port 5 status 001005 POWER sig=se0 PE CONNECT > > usb 1-5: reset high speed USB device using ehci_hcd and address 8 > > ehci_hcd 0000:00:1d.7: port 5 high speed > > ehci_hcd 0000:00:1d.7: GetStatus port 5 status 001005 POWER sig=se0 PE CONNECT > > usb 1-5: serial string changed > > usb 1-5: device firmware changed > > hub 1-0:1.0: logical disconnect on port 5 > > hub 1-0:1.0: state 7 ports 8 chg 0020 evt 0000 > > hub 1-0:1.0: port 5, status 0501, change 0000, 480 Mb/s > > usb 1-5: USB disconnect, address 8 > > usb 1-5: unregistering device > > usb 1-5: usb_disable_device nuking all URBs > > Your device electronically disconnected itself, not much that we can do > about this. It was a "logical" disconnect (meaning that the device failed to reset correctly during error recovery), not an electronic disconnect. But this still means that something went wrong at the hardware or firmware level. (That's the first time I've seen the "serial string changed" message. Weird.) > Bad cable? Bad power supply to the device? > > I blame the hardware :) Yes. If it happens again, we can see about getting more detailed debugging information. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
