Yea, looks like this may have been my mistake. Jonas asked me to check which settings were persisted by ofono, and I checked the core ofono support for saved settings, and didn't actually think about the possibility that the modem itself could persist this setting.
I just tested on mako/image #u107 and was able to change the tech-pref to 'gsm', and it persists across reboots. Note, our implementation of tech-pref is slightly different than the documented ofono api: https://github.com/rilmodem/ofono/blob/master/doc/radio-settings-api.txt First, we should only use 'gsm', 'umts', and if supported by the phone ( see below ), 'lte'. ofono states that setting the tech-pref to a particular technology pins the modem to that technology. Our usage is that a particular technology is the 'preferred' tech, although the modem is free to choose another technology that uses less power ( ie. 'umts' means prefer 'umts', but also allow 'gsm' ). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1334802 Title: ofono tech pref does not persist To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ofono/+bug/1334802/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
