Thanks for the log @Victor. So the smoking gun is:
Jun 4 14:26:41 ubuntu-phablet NetworkManager[1408]: <info> Disabling autoconnect for connection '/214040113340577/context2'. There's only one of these in the log. When this happens, NetworkManager has seen a disconnect for the modem, but hasn't yet seen the signal that the GPRS has de-tached ( which is what should happen when you change radio technology ). In this case, NM retries the modem rapidly, and burns through the autoconnect_retry_count for the connection. When this count reaches zero, NM sets a 5m timer to reset the retry_count and try again. This is indeed similar to the bug #1418077 ( FixReleased ) and bug #1445080 ( InProgress). I have a partial fix for the latter bug which may resolve your specific scenario. One question, do you wait for the network-indicator to show the mobile connection is active before switching the radio technology from 3g to 2g, and back again? I see the connection coming up in the syslog, but it looks like the technology gets toggled again before it's completely finished. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1461593 Title: No data connection switching from 2G only to 3G Status in network-manager package in Ubuntu: New Status in network-manager package in Ubuntu RTM: Incomplete Bug description: Test case. - Open System Settings. - Go to Cellular. - Switch from 3G to 2G, check that indicator network shows 2G only connection. - Switch from 2G only to 3G. Expected result. - Indicator network shows 3G connection, and user can use data connection. Actual result. - Data connection is lost. Tested in single SIM and dual SIM mode, with two different SIM cards from different operators. current build number: 23 device name: krillin channel: ubuntu-touch/rc-proposed/bq-aquaris.en To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1461593/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
