On Thu, 26 Jul 2007, Jean-Claude Repetto wrote:
> Alan Stern wrote:
> > On Wed, 25 Jul 2007, Jean-Claude Repetto wrote:
> >
> >> Hi,
> >>
> >> I have a device (a TomTom GPS) that is seen as a memory device when
> >> connected via USB.
> >> s
> >> If I plug the device before booting the PC, it is detected and
> >> accessible via /dev/sdb .
> >> But, if I plug the device after the PC has booted, the device is not
> >> accessible (the /dev/sdb device is not created). Idem if I disconnect
> >> and reconnect the device.
> >>
> >> I am using a x86 Gentoo system with kernel 2.6.22 (but I have also
> >> tested kernels 2.6.20 and 2.6.21).
> >>
> >> I have already asked for help on the Gentoo forums, but I got no useful
> >> answer. I hope I'll be more lucky here !
> >>
> >> BTW, I have tested the same device on the same computer with Ubuntu
> >> 7.04,
> >
> > What version of the kernel does that use? Do you have a usb-storage
> > log showing what happens when you plug the device in after booting?
> >
>
> The kernel is ubuntu-2.6.20-16 . Here is the log (but not in debug mode) :
>
> Jul 25 22:06:56 ubuntu kernel: [ 229.509634] usb 1-2: new full speed
> USB device using uhci_hcd and address 2
> Jul 25 22:06:56 ubuntu kernel: [ 229.688469] usb 1-2: configuration #1
> chosen from 1 choice
> Jul 25 22:06:57 ubuntu kernel: [ 229.801681] usbcore: registered new
> interface driver libusual
> Jul 25 22:06:57 ubuntu kernel: [ 229.824119] Initializing USB Mass
> Storage driver...
> Jul 25 22:06:57 ubuntu kernel: [ 229.824212] scsi2 : SCSI emulation for
> USB Mass Storage devices
> Jul 25 22:06:57 ubuntu kernel: [ 229.824274] usbcore: registered new
> interface driver usb-storage
> Jul 25 22:06:57 ubuntu kernel: [ 229.824278] USB Mass Storage support
> registered.
> Jul 25 22:07:02 ubuntu kernel: [ 234.824612] scsi 2:0:0:0:
> Direct-Access TomTom ONE PQ: 0 ANSI: 2
> Jul 25 22:07:02 ubuntu kernel: [ 234.829627] sd 2:0:0:0: Attached scsi
> removable disk sdb
> Jul 25 22:07:02 ubuntu kernel: [ 234.829682] sd 2:0:0:0: Attached scsi
> generic sg1 type 0
> Jul 25 22:07:02 ubuntu kernel: [ 235.003342] SCSI device sdb: 4019200
> 512-byte hdwr sectors (2058 MB)
> Jul 25 22:07:02 ubuntu kernel: [ 235.006335] sdb: Write Protect is off
> Jul 25 22:07:02 ubuntu kernel: [ 235.013324] SCSI device sdb: 4019200
> 512-byte hdwr sectors (2058 MB)
> Jul 25 22:07:02 ubuntu kernel: [ 235.016321] sdb: Write Protect is off
> Jul 25 22:07:02 ubuntu kernel: [ 235.016769] sdb:
That all looks normal. If you create the device node by hand, does it
work? The command is
mknod /dev/sdb b 8 16
If it does work, then you've got a problem with udev.
Alan Stern
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