Hi Kalle,

> I have been testing ofono with my Huawei E1552 usb stick, which is using > atmodem and PPP. I noticed that whenever I call test/deactivate-context > ofono either crashes or busyloops here in at_gprs_deactivate_primary(): > > if (g_at_chat_send(gcd->chat, buf, none_prefix, > at_cgact_down_cb, cbd, g_free) > 0) > return; > > Further investigation revealed that gcd->chat is already unreferenced in > setup_ppp(): > > g_at_chat_unref(gcd->chat); > > So there's a conflict here. How to handle this properly? Calling > g_at_ppp_shutdown() is most likely not enough, because nobody is not > creating gcd->chat again which is needed during subsequent activate > call. > > Comments? > Deactivation of the context was never made to work properly. For a hint, please have a look at gatchat/gsmdial.c. When PPP is established we should be using g_at_chat_suspend. During a context deactivation we should use g_at_ppp_shutdown and then reactivate the gatchat using g_at_chat_resume

(assuming the Huawei does not HUP the tty when disconnecting the ppp link.)