On Sat, 2 Mar 2013, Clemens Ladisch wrote: > >> Transcend JetFlash: > >> > >> ./ehci-test /dev/bus/usb/001/007 > >> URB timed out; bug may be present > >> URB timed out; bug may be present > >> URB timed out; bug may be present > >> URB timed out; bug may be present ... > All three devices on the same system with an AMD SB710 controller. > > >> (and, of course, nothing in the log) > > > > I stand by my original statement. > > I didn't want to imply any damage. But the "timed out" messages come > regularly every two seconds, which appears to indicate that the test > program doesn't manage to do what it wants to do. Possibly. The program uses a 2-second timeout, which explains the regular timing of the messages. The timeout means that _something_ is wrong. It could be the bug I was testing for, but more likely it is something else. > Are these messages normal? Well, let's say that they are normal when something goes wrong. :-) With a well-behaved host and a well-behaved flash drive, nothing should go wrong. But it's not all that surprising for a problem to arise. I wrote the test program for one specific purpose, so it doesn't have lots of diagnostic or recovery code. Maybe you're hitting a different bug, one that affects AMD SB* controllers. At any rate, if you're interested in finding out what the problem might be, the best place to start would be with a usbmon trace. 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
