I installed ubuntu 11.10 and from start I have no mobile broadband in my network indicator.
It used to work form live CD but when I installed it, mobile broadband wasn't listed at all.
When I plug in my 3g USB modem stick I get in /var/log/syslog:
Mar 12 21:08:12 goran-home-ubuntu kernel: [ 1349.648137] usb 2-4: new high speed USB device number 13 using ehci_hcd
Mar 12 21:08:12 goran-home-ubuntu mtp-probe: checking bus 2, device 13: "/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-4"
Mar 12 21:08:12 goran-home-ubuntu kernel: [ 1349.786894] scsi16 : usb-storage 2-4:1.0
Mar 12 21:08:13 goran-home-ubuntu mtp-probe: bus: 2, device: 13 was not an MTP device
Mar 12 21:08:13 goran-home-ubuntu usb_modeswitch: switching 1bbb:f000 (USBModem: HSPA Data Card)
Mar 12 21:08:14 goran-home-ubuntu kernel: [ 1351.025293] usb 2-4: USB disconnect, device number 13
Mar 12 21:08:14 goran-home-ubuntu kernel: [ 1351.392152] usb 2-4: new high speed USB device number 14 using ehci_hcd
Mar 12 21:08:14 goran-home-ubuntu mtp-probe: checking bus 2, device 14: "/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-4"
Mar 12 21:08:14 goran-home-ubuntu mtp-probe: bus: 2, device: 14 was not an MTP device
Mar 12 21:08:14 goran-home-ubuntu kernel: [ 1351.536138] option 2-4:1.0: GSM modem (1-port) converter detected
Mar 12 21:08:14 goran-home-ubuntu kernel: [ 1351.536280] usb 2-4: GSM modem (1-port) converter now attached to ttyUSB0
Mar 12 21:08:14 goran-home-ubuntu kernel: [ 1351.536412] option 2-4:1.1: GSM modem (1-port) converter detected
Mar 12 21:08:14 goran-home-ubuntu kernel: [ 1351.536503] usb 2-4: GSM modem (1-port) converter now attached to ttyUSB1
Mar 12 21:08:14 goran-home-ubuntu kernel: [ 1351.536932] scsi17 : usb-storage 2-4:1.2
Mar 12 21:08:14 goran-home-ubuntu kernel: [ 1351.537215] option 2-4:1.3: GSM modem (1-port) converter detected
Mar 12 21:08:14 goran-home-ubuntu kernel: [ 1351.537350] usb 2-4: GSM modem (1-port) converter now attached to ttyUSB2
Mar 12 21:08:14 goran-home-ubuntu usb_modeswitch: switched to 1bbb:0000 (USBModem: HSPA Data Card)
Mar 12 21:08:15 goran-home-ubuntu usb_modeswitch[32008]: usb_modeswitch: adding device ID 1bbb:0000 to driver option
Mar 12 21:08:15 goran-home-ubuntu kernel: [ 1352.538247] scsi 17:0:0:0: Direct-Access USBModem MMC Storage 2.31 PQ: 0 ANSI: 2
Mar 12 21:08:15 goran-home-ubuntu kernel: [ 1352.564799] sd 17:0:0:0: Attached scsi generic sg2 type 0
Mar 12 21:08:15 goran-home-ubuntu kernel: [ 1352.571989] sd 17:0:0:0: [sdb] Attached SCSI removable disk
It looks like USB modem is ready (I get flashing green light) but nothing happens.
I don't know if this is related but, in my network settings airplane mode to alway ON and I can't even switch wireless ON and airplane mod to OFF. Note also that there is no mobile broadband option in network settings.
When I run lsusb I get this:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 04f2:b128 Chicony Electronics Co., Ltd
Bus 002 Device 016: ID 1bbb:0000 T & A Mobile Phones
Bus 008 Device 002: ID 0930:020f Toshiba Corp.
EDIT: I use ALCATEL X080S 3g USB modem stick.
Best Answer
Problem was with that ALCATEL modem, with new release of ubuntu (12.04) it all works as expected. So I suggest upgrade for anyone who have this problem.