<div dir="auto"><div>Hi Aleksander,<br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, 5 Jun 2020, 10:22 am Aleksander Morgado, <<a href="mailto:aleksander@aleksander.es">aleksander@aleksander.es</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hey!<br> <br> > I am facing an unexpected - as far as I can tell - behavior with ModemManager 1.12.8 and network manager is 1.22.10 on Ubuntu 20.04, the modem is LE910 V2.<br> ><br> > During and ongoing connection, lasting since 38 minutes, the tty port is force closed after the following message<br> ><br> > <debug> (ttyACM3): <-- '+CGEV: ME DEACT IP, "10.29.174.52", 1<CR><LF>'<br> ><br> > Is it normal that a deactivation leads to a port close?<br> ><br> <br> No it isn't, this happened due to the mixup of the CLOCAL settings,<br> full relevant logs:<br> <br> Jun 3 16:49:22 orndura ModemManager[418]: <debug> (ttyACM3): <--<br> '+CGEV: ME DEACT IP, "10.29.174.52", 1<CR><LF>'<br> Jun 3 16:49:22 orndura ModemManager[418]: <info> mobile equipment<br> request to deactivate context (type IP, address 10.29.174.52, cid 1)<br> Jun 3 16:49:22 orndura NetworkManager[411]: <info> [1591192162.3478]<br> modem["ttyACM0"]: modem state changed, 'connected' --> 'registered'<br> (reason: user-requested)<br> Jun 3 16:49:22 orndura ModemManager[418]: <info> Bearer<br> /org/freedesktop/ModemManager1/Bearer/1: explicitly disconnected<br> <br> MM detects the disconnection and by itself reports the modem<br> disconnected, it shouldn't have done that, it should have ignored the<br> disconnection report detected by itself and wait for pppd to detect it<br> itself.<br> <br> Jun 3 16:49:22 orndura NetworkManager[411]: <info> [1591192162.3479]<br> device (ttyACM0): state change: activated -> failed (reason<br> 'modem-no-carrier', sys-iface-state: 'managed')<br> Jun 3 16:49:22 orndura ModemManager[418]: <debug> (ttyACM0): port now<br> disconnected<br> Jun 3 16:49:22 orndura NetworkManager[411]: <debug> [1591192162.3501]<br> active-connection[0x19bb480]: set state deactivated (was activated)<br> Jun 3 16:49:22 orndura ModemManager[418]: <info> Modem<br> /org/freedesktop/ModemManager1/Modem/1: state changed (connected -><br> registered)<br> Jun 3 16:49:22 orndura NetworkManager[411]: <info> [1591192162.3508]<br> manager: NetworkManager state is now DISCONNECTED<br> Jun 3 16:49:22 orndura NetworkManager[411]: <debug> [1591192162.3515]<br> active-connection[0x19bb480]: check-master-ready: not signalling<br> (state deactivated, no master)<br> Jun 3 16:49:22 orndura pppd[2774]: Modem hangup<br> Jun 3 16:49:22 orndura NetworkManager[411]: Modem hangup<br> <br> CHUP happens in the TTY, which MM also detects because it was already<br> also monitoring the port.<br> <br> Jun 3 16:49:22 orndura pppd[2774]: nm-ppp-plugin: (nm_phasechange):<br> status 8 / phase 'network'<br> Jun 3 16:49:22 orndura ModemManager[418]: <debug> (ttyACM3): <-- '<CR><LF>'<br> Jun 3 16:49:22 orndura ModemManager[418]: <debug> (ttyACM0)<br> unexpected port hangup!<br> Jun 3 16:49:22 orndura ModemManager[418]: <debug> (ttyACM0) forced to<br> close port<br> <br> MM treats the HUP as a port removal, which shouldn't have happened if<br> the disconnection was reported by NM after pppd exit, as CLOCAL<br> settings would have been reset.<br> <br> I thought this should have been fixed in<br> 5f29bd64de8127cb326488d68a2a2b64a45e1f45, but I don't see the relevant<br> "PPP is required for connection, will ignore disconnection reports"<br> message that should happen once the modem gets connected in PPP mode.<br> <br> If you have the setup with you, could you check why this message is<br> not being logged?<br> <br> -- <br> Aleksander<br> <a href="https://aleksander.es" rel="noreferrer noreferrer" target="_blank">https://aleksander.es</a></blockquote></div></div><div dir="auto"><br></div><div dir="auto">Thanks for the analysis!</div><div dir="auto">We were thinking about something related to clocal, but not this detail, indeed.</div><div dir="auto">I'll double check with the setup and keep, and report it back</div><div dir="auto"><br></div><div dir="auto">Carlo</div><div dir="auto"><br></div><div dir="auto"> I'll double check the setup, and </div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br> </blockquote></div></div></div>