Hi Denis, Den ons 19 feb. 2020 kl 19:52 skrev Denis Kenzior <denk...@gmail.com>:
> Hi Richard, > > On 2/18/20 3:19 AM, Richard Röjfors wrote: > > Hi, > > > > Ofono (at least for ublox) is always powering off the radio during start. > > This can of course be handy of programmatic reasons to bring the modem > > to a known state. > > Some configuration requires the radio to be turned off; for instance > > the LTE auto connect APN. But on the other hand these are stored in > > non-volatile memory and could be configured before hand. > > So by default we bring the device into airplane mode until the SIM card > has been initialized. Also, the policy decision of bringing the radio > up / down was left to external services such as ConnMan. > > > > > The big drawback with turning it off is that it might take time to > > register again when the radio is on. I have seen it taking more than 10 > > minutes in extreme cases. > > > > That's nuts. Shouldn't take more than a few seconds? > I would assume so too, but that's what we have experienced. > > > In embedded systems this can be a big issue. > > > > Indeed. > > > I'm thinking of adding a configuration option to keep the radio on > > during start. > > > > Whats the general thought about this? > > > > Not sure. Are you certain that adding such low-level config options is > the right approach? I'm not sure thats why I started the discussion. The other suggestion in this thread was to use some environment variable to pass the information, maybe thats a better way? > Even documenting / explaining what and why this > configuration option is there would be challenging I imagine. > Yes it will be. I think I'm convinced we should not have this feature upstreams. --Richard
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