My Canon Scanner (CanoScan N1240U) worked well until I updated from Suse 10.0 to Suse 10.1.

In /var/log/messages I can see

Jul 29 19:30:36 baer kernel: usb 2-2: USB disconnect, address 3
Jul 29 19:30:41 baer kernel: usb 2-2: new full speed USB device using uhci_hcd and address 4
Jul 29 19:30:41 baer kernel: usb 2-2: new device found, idVendor=04a9, idProduct=220e
Jul 29 19:30:41 baer kernel: usb 2-2: new device strings: Mfr=64, Product=77, SerialNumber=0
Jul 29 19:30:41 baer kernel: usb 2-2: Product: CanoScan
Jul 29 19:30:41 baer kernel: usb 2-2: Manufacturer: Canon
Jul 29 19:30:41 baer kernel: usb 2-2: configuration #1 chosen from 1 choice

but lsusb gives me

baer:/home/peter # lsusb
Bus 001 Device 004: ID 05fe:0011 Chic Technology Corp. Browser Mouse
Bus 001 Device 001: ID 0000:0000
Bus 004 Device 001: ID 0000:0000
Bus 005 Device 005: ID 05dc:b018 Lexar Media, Inc. Multi-Card Reader
Bus 005 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000

Where can I find out what went wrong inbetween?

Regards
Peter

I assume my last thread wasn't formulated good. Because I assume all you linux gurus should know out of the top of your head what the steps are between an usb device plugged in and identified as such (as shown by the /var/log/messages) and the status where it is available for being shown by lsusb.

So where can I look for the error?

TIA for any help

You might want to leave the scanner plugged in at boot. Sometimes hotplug doesn't stay connected to an idle device. If you plug in the scanner, and use it right away, or at least access it, it should stay connected. Or, if you let the bootup install the scanner it will stay there.

Thank you for your hints - I tried both:
Booting with scanner connected
Trying to use directly after connecting

Unfortunately without success. So I'm still looking for further advice.