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[Bug 1445080] Re: Cellular data not activated after exiting flight mode

 

Version: ubuntu-touch/devel-proposed/krillin.en r59 krillin

Slightly different scenario with similar symptoms:

 * Tesco Mobile SIM in slot 1 (O2 MVNO)
 * On booting the phone registers on network and cellular data is enabled
 * Can browse internet etc
 * After some time it appears the network drops (bars empty)
 * It reconnects quickly but the data connection does not come back up

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https://bugs.launchpad.net/bugs/1445080

Title:
  Cellular data not activated after exiting flight mode

Status in the base for Ubuntu mobile products:
  New
Status in network-manager package in Ubuntu:
  Confirmed

Bug description:
  Cellular data is not activated in ~50% of the cases in arale after
  setting then unsetting flight mode.

  I obtained the attached log this way:

  1. Disabled wifi (to have less noise) and removed syslog (to make smaller the attached one)
  2. Reboot
  3. See cellular data is on: route is right, I have network access
  4. Set flight mode
  5. Unset flight mode
  6. Data is not restored even after waiting for a few minutes. ccmni0 interface is down.

  list-modems shows that the modem is data-attached
  list-contexts output shows that no IP context has been activated

  Doing

  usr/share/ofono/scripts/activate-context 1
  sudo ip route add default dev ccmni0
  ping 8.8.8.8

  works and I receive the ping responses.

  $ system-image-cli -i
  current build number: 12
  device name: arale
  channel: ubuntu-touch/tangxi-vivid-proposed
  last update: 2015-04-16 08:06:39
  version version: 12
  version ubuntu: 20150416.0
  version device: a17b9320788e7215ddf123544a3a2b5a4fa61f0d5add83f393866e8c7a9155b0
  version custom: 20150416.0

  + NetworkManager 0.9.10.0-4ubuntu15~mtrudel1 (silo 29 atm)

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References