Comment 1 for bug 1097495

Rebooted the same machine into 12.04 LTS, and no problems there. So a problem in 12.10 / modemmanager 0.6.x?

[ 80.113892] usb 2-1.5: new high-speed USB device number 3 using ehci_hcd
[ 80.249975] Initializing USB Mass Storage driver...
[ 80.250102] scsi5 : usb-storage 2-1.5:1.0
[ 80.250214] usbcore: registered new interface driver usb-storage
[ 80.250217] USB Mass Storage support registered.
[ 80.327526] usbcore: registered new interface driver uas
[ 81.248939] scsi 5:0:0:0: CD-ROM ZTE USB SCSI CD-ROM 2.31 PQ: 0 ANSI: 2
[ 81.253352] sr1: scsi-1 drive
[ 81.253568] sr 5:0:0:0: Attached scsi CD-ROM sr1
[ 81.253705] sr 5:0:0:0: Attached scsi generic sg2 type 5
[ 82.909364] usb 2-1.5: USB disconnect, device number 3
[ 88.220380] usb 2-1.5: new high-speed USB device number 4 using ehci_hcd
[ 88.319036] scsi6 : usb-storage 2-1.5:1.4
[ 88.358778] usbcore: registered new interface driver usbserial
[ 88.358796] USB Serial support registered for generic
[ 88.358851] usbcore: registered new interface driver usbserial_generic
[ 88.358853] usbserial: USB Serial Driver core
[ 88.400647] USB Serial support registered for GSM modem (1-port)
[ 88.400734] option 2-1.5:1.0: GSM modem (1-port) converter detected
[ 88.400863] usb 2-1.5: GSM modem (1-port) converter now attached to ttyUSB0
[ 88.400891] option 2-1.5:1.1: GSM modem (1-port) converter detected
[ 88.400991] usb 2-1.5: GSM modem (1-port) converter now attached to ttyUSB1
[ 88.401018] option 2-1.5:1.2: GSM modem (1-port) converter detected
[ 88.401168] usb 2-1.5: GSM modem (1-port) converter now attached to ttyUSB2
[ 88.401222] usbcore: registered new interface driver option
[ 88.401225] option: v0.7.2:USB Driver for GSM modems
[ 89.318654] scsi 6:0:0:0: CD-ROM ZTE USB SCSI CD-ROM 2.31 PQ: 0 ANSI: 2
[ 89.322897] scsi 6:0:0:1: Direct-Access ZTE MMC Storage 2.31 PQ: 0 ANSI: 2
[ 89.332656] sr1: scsi-1 drive
[ 89.332934] sr 6:0:0:0: Attached scsi CD-ROM sr1
[ 89.333903] sr 6:0:0:0: Attached scsi generic sg2 type 5
[ 89.334173] sd 6:0:0:1: Attached scsi generic sg3 type 0
[ 89.337719] sd 6:0:0:1: [sdb] Attached SCSI removable disk
[ 166.230341] PPP BSD Compression module registered
[ 166.247097] PPP Deflate Compression module registered

sander@R540:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04 LTS
Release: 12.04
Codename: precise
sander@R540:~$

sander@R540:~$ apt-cache policy modemmanager
modemmanager:
  Installed: 0.5.2.0-0ubuntu2
  Candidate: 0.5.2.0-0ubuntu2
  Version table:
 *** 0.5.2.0-0ubuntu2 0
        500 http://nl.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
        100 /var/lib/dpkg/status
sander@R540:~$

ifconfig:

ppp0 Link encap:Point-to-Point Protocol
          inet addr:10.46.241.202 P-t-P:10.64.64.64 Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
          RX packets:7 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:130 (130.0 B) TX bytes:181 (181.0 B)