Hi Aleksander, Giacinto, Thanks for your replies !
On Sat, Nov 7, 2020 at 9:47 AM Aleksander Morgado <aleksan...@aleksander.es> wrote: > > Hey, > > > We're running 1.14.2 on a Cinterion (PLS62W) module. > > > > The modem is connected for a while and suddenly loses registration > > causing MM to start a forced disconnect of the bearer, but the attempt > > at disconnection fails. > > > > Oct 29 22:11:24.709516 ModemManager[530]: <info> [1604009484.709151] > > [modem0] state changed (connected -> disconnecting) > > Oct 29 22:11:24.768445 ModemManager[530]: <debug> [1604009484.768058] > > [modem0/bearer0] sending PDP context deactivation in primary port... > > Oct 29 22:11:24.772352 ModemManager[530]: <debug> [1604009484.771977] > > [modem0/ttyACM1/at] device open count is 2 (open) > > Oct 29 22:11:24.777015 ModemManager[530]: <debug> [1604009484.776642] > > [modem0/ttyACM1/at] --> 'AT+CGACT=0,1<CR>' > > Oct 29 22:11:24.966486 ModemManager[530]: <debug> [1604009484.965979] > > [modem0/ttyACM1/at] <-- '<CR><LF>+CME ERROR: 202<CR><LF>' > > Oct 29 22:11:24.968238 ModemManager[530]: <debug> [1604009484.967858] > > [modem0/ttyACM1/at] invalid mobile equipment error code: 202 > > > Is 202 a generic error code, or Cinterion specific? Did you look that up? Giacinto beat me to your question :) , in this context it means we attempted to disconnect the default PDN (not ok on LTE modules). > > > Oct 29 22:11:24.970829 ModemManager[530]: <debug> [1604009484.970446] > > [modem0/ttyACM1/at] operation failure: 100 (Unknown error) > > Oct 29 22:11:24.971581 ModemManager[530]: <debug> [1604009484.971142] > > [modem0/bearer0] PDP context deactivation failed (not fatal): Unknown > > error > > Oct 29 22:11:24.973145 ModemManager[530]: <debug> [1604009484.972774] > > [modem0/bearer0] reopening data port ttyACM0... > > Oct 29 22:11:24.973759 ModemManager[530]: <debug> [1604009484.973331] > > [modem0/ttyACM0/at] reopening port (1) > > Oct 29 22:11:24.974182 ModemManager[530]: <debug> [1604009484.973840] > > [modem0/ttyACM0/at] device open count is 0 (close) > > Oct 29 22:11:24.974661 ModemManager[530]: <debug> [1604009484.974316] > > [modem0/ttyACM0/at] closing serial port... > > > > I'm missing the next debug logs in the sequence, the ones telling us > whether the flashing done during disconnect succeeded or not. > > > Subsequent attempts to connect the bearer fails with this error: > > GDBus.Error:org.freedesktop.ModemManager1.Error.Core.Failed: Bearer > > currently being disconnected > > > > That is definitely an error in the logic. > > > My question is if the bearer disconnect fails (AT+CGACT) fails then > > does that leave the bearer state machine in "Disconnecting" state ? > > Hence preventing future attempts to connect the bearer ? > > If so, how does one get out of this state ? > > > > So, a failure in disconnection is something not very easy to handle. > What would you do? Would you say that a failure in disconnection means > that the modem is still connected? Or would you say that a failure in > disconnection just indicates a failure in the procedure but the modem > is really disconnected? In the case of the generic modem, we assume a > failure in the AT+CGACT command running the disconnection is not fatal > (as seen in your logs), and after that we still run some additional > procedures like the port re-opening and flashing. If CGACT fails but > the remaining steps succeed, I would consider the disconnection > successful. Either way, *as soon as* the disconnection process ends, > with an error or not, the modem state should transition to a different > state that is not disconnecting, it should reach a "final" state. If > it doesn't reach that state, there is an error somewhere. > > If this issue is easy to reproduce for your, please re-run it and this > time gather much more debug logs, and once you have them open a new > Issue in gitlab and attach all the infor there: > https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues > The logic you have which is to ignore the result of PDP deactivation is correct. I guess I am less concerned about the CME Error and more curious about the bearer state. I have set up a new issue: https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/277 I have attached one set of logs to it, This issue happened twice during a test run 10 days ago and hasn't happened since. Best Regards Girish > -- > Aleksander > https://aleksander.es -- -- Girish Mahadevan Firmware Engineer 10368 Westmoor Drive | Westminster, CO 80021 _______________________________________________ ModemManager-devel mailing list ModemManager-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel
