** Also affects: network-manager (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/772577

Title:
  Kernel in Natty disconnects Huawei E160G, ModemManager can't use it

Status in The Linux Kernel:
  New
Status in “linux” package in Ubuntu:
  Incomplete
Status in “network-manager” package in Ubuntu:
  Confirmed

Bug description:
  Upgraded to Natty yesterday and since then my Huawei E160G is no
  longer detected properly by ModemManager. It seems the kernel closes
  the USB port during ModemManager's Huawei plugin probe, so it never
  gets fully connected and probing loops forever (see attached syslog
  with ModemManager debug logs enabled).

  Also, when kernel says "option: option_instat_callback: error -108",
  the whole PC gets frozen for exactly 10 seconds.

  This issue happens with both Natty's default ModemManager
  (0.4+git.20110124t203624.00b6cce-2ubuntu1) and latest git master, so
  it really seems something kernel-related.

  aleksander@ares:~$ uname -a
  Linux ares 2.6.38-8-generic-pae #42-Ubuntu SMP Mon Apr 11 05:17:09 UTC 2011 
i686 i686 i386 GNU/Linux

  This issue is not reproducible neither in Maverick nor in Fedora15
  (kernel 2.6.38-3-18.fc15.i686)

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