On Tue, 22 Jan 2013, Norbert Preining wrote: > Hi Felipe, hi all, > > On Mo, 21 Jan 2013, Felipe Balbi wrote: > > Can you try rebuilding your kernel with CONFIG_USB_DEBUG=y and run your > > test again ? Maybe it gives us more information of what's going on. > > Ok, I can reliably reproduce the problem as follows: > * connect the kindle, it goes into usb disk mode > * !!! important !!! use the temporary gnome3 dbus window to "Eject" > the device > after that the device is not really ejected > * use "eject /dev/sdb" > after this the device is actually ejected > * unplug and replug > here the usb system does not recognize the device anymore, and > does not react on any usb connections > * call lsusb -v gets it back to normal > * repeat the above > > I have collected the syslog output of one of the cycles starting from > lsusb -v to get back to normal, plugging, ejecting with dbus window, > eject with cmd line, plug/replug without effect, etc. > > The log can be found at > http://www.preining.info/usb-syslog-prob.txt > I have documented the steps *in* the log file by calling > logger .... > with the appropriate steps, so please seach for > norbert: > which will give you the comments I have written with logger and > the sequence of actions. > > Hope that helps, and let me know if you want/need more details. It looks like things may improve if you do echo 50 >/sys/bus/usb/devices/usb1/power/autosuspend_delay_ms Quite possiblly your problem was caused when the default autosuspend delay for hubs was changed from 2 seconds to 0. Increasing it to 50 ms might fix things. 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
