[Bug 925473] Re: USB 3g modems dont switch to ttyUSB until udevadm trigger

[Surja Gain]

Any progress on this one? Upgrading to Ubuntu 12.04 beta2 does not seem
to solve the problem. In my case sending the udevadm trigger does not
seem do anything.

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https://bugs.launchpad.net/bugs/925473

Title:
  USB 3g modems dont switch to ttyUSB until udevadm trigger

Status in “udev” package in Ubuntu:
  Confirmed

Bug description:
  After completed install of xubuntu precise i386:

  inserting any USB modem, none are recognised (I tried E220, E169 and
  E160E)

  in dmesg all you see is the fake CDROM device, indicating the usb
  modeswitch isnt happening

  eventually I tried `udevadm trigger` with the E220 plugged in, and it
  switched to serial and I could connect to the Internet with it when
  modemmanager eventually found it.  From this point on any of the
  modems are recognized as USB serial when you plugin them in.

  After reboot, back to square one until the first time you do a udevadm trigger.
  --- 
  ApportVersion: 1.91-0ubuntu1
  Architecture: i386
  DistroRelease: Ubuntu 12.04
  InstallationMedia: Xubuntu 12.04 "Precise Pangolin" - Alpha i386 (20120201.1)
  Package: usb-modeswitch 1.2.0+repack0-1ubuntu1
  PackageArchitecture: i386
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 3.2.0-12.21-generic-pae 3.2.2
  Tags:  precise
  Uname: Linux 3.2.0-12-generic-pae i686
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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