7.0-BETA3 kernel panic when unplugging USB stick

Matthias Schmidt schmidtm at mathematik.uni-marburg.de
Tue Nov 27 01:21:46 PST 2007

Hi Remko,

* Remko Lodder wrote:
> When the device is plugged in can you show us a pciconf -vl and perhaps
> an excerpt from the dmesg? so that we might be able to add it to the
> supported devicelist? (which might also resolve the problem, though that
> would be a workaround imo since the machine should not panic because of
> plugging in something and unplugging it, at least not when it's not
> being used :-))

Here is the message from dmesg and additionally /var/log/messages:

umass0: <vendor 0x0420 product 0x1307, class 0/0, rev 2.00/1.00, addr 3>
on uhub2
Nov 27 10:01:22 node008 root: Unknown USB device: vendor 0x0420 product
0x1307 bus uhub2

usbdevs -v shows the following:

Controller /dev/usb1:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000),
Intel(0x0000), rev 1.00
port 1 powered
port 4 addr 3: full speed, power 100 mA, config 1, product
0x1307(0x1307), vendor 0x0420(0x0420), rev 1.00

pciconf is quiet about the stick but you can find the complete output
under http://www.mathematik.uni-marburg.de/~schmidtm/usbcrash/pciconf

If I plug the stick into Mac OS X or Windows XP it identifies itself as
"ChipsBnk Flash Disk USB Device" and shows a capacity of 8MB although it
has 1GB.  I found a closed PR about a ChipsBnk quirk, so the chip should
be recognized properly.




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