I think BIOS cannot be the root cause, because CS-17 has worked on this same machine before 12.04.
However, this seems to be a USB modeswitch problem/conflict. I'm now able to make the device work like this: 1) Set DisableSwitching=1 in /etc/usb_modeswitch.conf 2) $ eject /dev/sr1 For some reason ejecting the device makes it recognized and I can configure Mobile Broadband via the network menu. In the kernel log there's now: [506024.529864] usb 2-1.1: USB disconnect, device number 26 [506028.624240] usb 2-1.1: new high-speed USB device number 27 using ehci-pci [506028.716868] usb 2-1.1: New USB device found, idVendor=0421, idProduct=0623 [506028.716874] usb 2-1.1: New USB device strings: Mfr=2, Product=1, SerialNumber=3 [506028.716878] usb 2-1.1: Product: Nokia Datacard [506028.716881] usb 2-1.1: Manufacturer: Nokia [506028.716884] usb 2-1.1: SerialNumber: 4CC03614CA2E62E7498AB72726150A37EB8BB978 [506028.717682] cdc_acm 2-1.1:1.1: ttyACM0: USB ACM device [506028.718259] cdc_acm 2-1.1:1.3: ttyACM1: USB ACM device -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1071014 Title: Nokia CS-17 mobile broadband doesn't work anymore To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1071014/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
