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[Damon Lynch <damonlynch@xxxxxxxxx>]

$ systemctl status -l usb_modeswitch@-3-1.2:1.0.service
● usb_modeswitch@-3-1.2:1.0.service - USB_ModeSwitch
   Loaded: loaded (/lib/systemd/system/usb_modeswitch@.service; static; vendor preset: enabled)
   Active: failed (Result: exit-code) since Thu 2015-03-12 12:34:56 TJT; 1min 5s ago
  Process: 892 ExecStart=/usr/sbin/usb_modeswitch_dispatcher --switch-systemd %I (code=exited, status=1/FAILURE)
 Main PID: 892 (code=exited, status=1/FAILURE)

Mar 12 12:34:56 damon-W520 systemd[1]: Starting USB_ModeSwitch...
Mar 12 12:34:56 damon-W520 systemd[1]: usb_modeswitch@-3-1.2:1.0.service: main process exited, code=exited, status=1/FAILURE
Mar 12 12:34:56 damon-W520 systemd[1]: Failed to start USB_ModeSwitch.
Mar 12 12:34:56 damon-W520 systemd[1]: Unit usb_modeswitch@-3-1.2:1.0.service entered failed state.
Mar 12 12:34:56 damon-W520 systemd[1]: usb_modeswitch@-3-1.2:1.0.service failed.


** Attachment added: "Requested udev output before manual modem start"
   https://bugs.launchpad.net/ubuntu/+source/usb-modeswitch/+bug/1431179/+attachment/4342361/+files/udev.txt

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https://bugs.launchpad.net/bugs/1431179

Title:
  USB 4G modem detected as USB mass storage

Status in usb-modeswitch package in Ubuntu:
  Incomplete

Bug description:
  I lack the technical knowledge to know if this is a bug in udev,
  systemd or another component.

  After the switch to systemd, my 4G Huawei USB modem  no longer
  functions as a modem unless I run usb_modeswitch to flip its state
  from USB mass storage. The command I issue and its output is below,
  which also show the Vendor and Product ID.

  Strangely, it does not do this every time. Yesterday when I updated
  using apt-get dist-upgrade upon reboot the modem worked as expected.
  But from a cold boot this morning it did not.

  $ sudo usb_modeswitch -v 0x12d1 -p 0x1f01 -J
  [sudo] password for damon: 
  Look for default devices ...
     product ID matched
   Found devices in default mode (1)
  Access device 003 on bus 003
  Current configuration number is 1
  Use interface number 0
  Use endpoints 0x01 (out) and 0x81 (in)

  USB description data (for identification)
  -------------------------
  Manufacturer: HUAWEI Technology
       Product: HUAWEI Mobile
    Serial No.: FFFFFFFFFFFFFFFF
  -------------------------
  Using standard Huawei switching message
  Looking for active driver ...
   OK, driver detached
  Set up interface 0
  Use endpoint 0x01 for message sending ...
  Trying to send message 1 to endpoint 0x01 ...
   OK, message successfully sent
  Reset response endpoint 0x81
   Could not reset endpoint (probably harmless): -99
  Reset message endpoint 0x01
   Could not reset endpoint (probably harmless): -99
   Device is gone, skip any further commands
  -> Run lsusb to note any changes. Bye!

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: udev 219-4ubuntu5
  ProcVersionSignature: Ubuntu 3.19.0-8.8-generic 3.19.1
  Uname: Linux 3.19.0-8-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.16.2-0ubuntu2
  Architecture: amd64
  CurrentDesktop: Unity
  CustomUdevRuleFiles: 60-ssd-scheduler.rules
  Date: Thu Mar 12 11:37:06 2015
  InstallationDate: Installed on 2015-02-05 (34 days ago)
  InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150205)
  MachineType: LENOVO 427637U
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-8-generic root=UUID=eb18ef51-a2d0-4372-8eb9-ae009a05d4f6 ro quiet splash
  SourcePackage: systemd
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/26/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8BET62WW (1.42 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 427637U
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr8BET62WW(1.42):bd07/26/2013:svnLENOVO:pn427637U:pvrThinkPadW520:rvnLENOVO:rn427637U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 427637U
  dmi.product.version: ThinkPad W520
  dmi.sys.vendor: LENOVO

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