On Sat, 18 Oct 2008, Vegard Nossum wrote: > > The log shows a disconnect on usb 1-2 and a failed reset followed by a > > logical disconnect on usb 1-6. If either of those was the root fs, > > it's understandable that your system would hang. After all, you can't > > expect it to do much when the root fs is gone. > > I agree :-) The root fs was plugged in all along, and I didn't touch > it. The root fs was this (from same log): > > usb 1-6: configuration #1 chosen from 1 choice > usb 1-6: New USB device found, idVendor=090c, idProduct=1000 > usb 1-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3 > usb 1-6: Product: DISK 2.0 > usb 1-6: Manufacturer: USB > usb 1-6: SerialNumber: 9GXZ0MZLH75GCAH7 > > So it seems that maybe the disk itself is bad? But it is also an odd > coincidence that it would only happen when (re-)plugging other USB > devices? Some sort of hardware problem caused the communication with 1-6 to fail when 1-2 was unplugged. No way to tell exactly what went wrong without using a bus analyzer -- and even that might not give an exact answer. For instance, it's possible that the EHCI controller hardware got confused as a result of the disconnect occurring on port 2 while data was being transferred over port 6. You could try getting a hub and plugging the flash drives into the hub rather than into the computer. That might make a difference. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
