01-31-2021, 09:30 AM
(01-31-2021, 07:45 AM)Codenul Wrote: ...
Modem : Sometimes this is filled out with information, something not.
...
Hey! Just jumping in on this - I've experienced it before too. It looks like sometimes (after the phone goes to sleep), the modem does not wake up after the phone itself has woken up. When this happens to me on Manjaro Plasma, the "Modem" tab indeed goes blank. When the modem disappears, my SIM card and APN settings tabs also go blank. Other symptoms: trying to make an outbound call in the phone app will fail (no response after pressing the "call" button, sometimes the phone app will say "a phone call cannot be made at this time).
I know that this happens with all the OSes / distros, but I'm still not sure why it fails like this at "runtime" on Plasma. The dmesg logs look about the same to me between modem-wakeup-success, and modem-wakeup-failure. I know that some distros force the modem to power off and on to get connectivity back. E.g. I think PostmarketOS handles it using a userspace program eg25-manager. I think Manjaro relies on Megi's kernel to handle modem power cycling?
Interestingly, this wakeup-failure does not happen to me if the Plasma phone is woken up by the modem itself (i.e. receiving SMS/phone calls). But it does happen unpredictably if woken up by the user (tapping the screen or pressing the power button). It doesn't help that I get no visual indicator on whether the modem is dead or not, so I "test" this by trying to make a phone call after the phone wakes and seeing if the call goes through... Workaround at the moment is to reboot the phone.
Could you try a fresh reboot of your phone, and see if the "settings -> modem" tab gets populated? If it is, I found that you need to run
Code:
sudo ofonoctl wan --connect --append-dnsin order to get an IP address and DNS nameserver assigned to wwan0 for mobile data. I put this command into a systemd startup script just to make it more automatic.