[Bug 1441901] Re: 3G modem mode switch doesn't work when using systemd

[Anand Kumria]

*** This bug is a duplicate of bug 1431179 ***
    https://bugs.launchpad.net/bugs/1431179

The same problem occurs with Ubuntu 16.04 LTS.

Cold-boot, particularly, this seems to fail.

Basically the problem is that usb_modeswitch_dispatcher is called with
incorrect arguments.


# systemctl --all | grep usb_modeswitch
● usb_modeswitch at 1-9_1-9:1.0.service                                                                    loaded    failed   failed    USB_ModeSwitch_1-9_1-9:1.0
  system-usb_modeswitch.slice                                                                           loaded    active   active    system-usb_modeswitch.slice

# systemctl status -l usb_modeswitch at 1-9_1-9:1.0.service
● usb_modeswitch at 1-9_1-9:1.0.service - USB_ModeSwitch_1-9_1-9:1.0
   Loaded: loaded (/lib/systemd/system/usb_modeswitch at .service; static; vendor preset: enabled)
   Active: failed (Result: exit-code) since Wed 2016-10-05 13:33:07 UTC; 1h 4min ago
  Process: 615 ExecStart=/usr/sbin/usb_modeswitch_dispatcher --switch-systemd %i (code=exited, status=1/FAILURE)
 Main PID: 615 (code=exited, status=1/FAILURE)

Oct 05 13:33:04 giskard2 systemd[1]: Starting USB_ModeSwitch_1-9_1-9:1.0...
Oct 05 13:33:07 giskard2 systemd[1]: usb_modeswitch at 1-9_1-9:1.0.service: Main process exited, code=exited, status=1/FAILURE
Oct 05 13:33:07 giskard2 systemd[1]: Failed to start USB_ModeSwitch_1-9_1-9:1.0.
Oct 05 13:33:07 giskard2 systemd[1]: usb_modeswitch at 1-9_1-9:1.0.service: Unit entered failed state.
Oct 05 13:33:07 giskard2 systemd[1]: usb_modeswitch at 1-9_1-9:1.0.service: Failed with result 'exit-code'.

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https://bugs.launchpad.net/bugs/1441901

Title:
  3G modem mode switch doesn't work when using systemd

Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  Hi!

  I'm using Ubuntu 14.10 and I've got USB 3G modem Huawei E173. If I use
  upstart, when I connect this modem, it is automatically switched to
  modem-mode and I can connect to the network. But if I switch to
  systemd, it doesn't, but I'm able to switch it manually using command:

  sudo usb_modeswitch -v 0x12d1 -p 0x1446 -V 0x12d1 -P 0x1436 -M
  55534243123456780000000000000011062000000100000000000000000000

  I'm using kernel 3.19.3 64-bit from Ubuntu Kernel PPA:

  3.19.3-031903-generic #201503261036 SMP Thu Mar 26 14:37:55 UTC 2015
  x86_64 x86_64 x86_64 GNU/Linux

  All system packages are up-to-date.

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