This sounds similar to bug #1410113, which is a more generic bug. I'm not going to mark this a duplicate however as it has a reproducible scenario.
Also confirmed this bug for RTM, as I reproduced it on the third try. I verified that there was a mobile data connection and that it worked ( ie. I could ping ubuntu.com ), activated a WiFi connection, verified the routing table, and then disabled WiFi. On the third cycle, I ended up with an empty routing table: phablet@ubuntu-phablet:~$ netstat -run Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface ...that said, at some point, it looks like the system did recover at some later point, as it appears to have magically healed itself, and I know have a valid routing table, and usable mobile data connection. I will continue to work on reproducing, and will add logs, and other data if/when I can do so again. phablet@ubuntu-phablet:~$ system-image-cli -i current build number: 20 device name: krillin channel: ubuntu-touch/ubuntu-rtm/14.09 last update: 2015-03-26 15:44:56 version version: 20 version ubuntu: 20150312 version device: 20150310-3201c0a version custom: 20150216-561-29-186 ** Changed in: network-manager (Ubuntu RTM) Importance: High => Critical ** Changed in: network-manager (Ubuntu) Importance: High => Critical -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1436427 Title: Turning off WiFi doesn't set a route after the modem connects data Status in the base for Ubuntu mobile products: New Status in network-manager package in Ubuntu: New Status in network-manager package in Ubuntu RTM: Confirmed Bug description: I just switched off WiFi in order to test if the device switches successfully to a mobile data connection. After disabling WiFi the indicator showed "H" in no time. So it would seem all is fine. I opened the browser and no data went through. Here's the output of "ip route" and "list-contexts": http://paste.ubuntu.com/10678851/ phablet@ubuntu-phablet:~$ system-image-cli -i current build number: 21 device name: krillin channel: ubuntu-touch/rc/bq-aquaris.en last update: 2015-03-13 17:11:07 version version: 21 version ubuntu: 20150312 version device: 20150310-3201c0a version custom: 20150216-561-29-186 To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1436427/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
