Hi August, On 06/21/2012 05:51 AM, August Mayer wrote: > Hello, > > When connecting again to GPRS / PPP, after an Internet connection has > been closed previously, the connection seems to fail. It looks like the > ofono_modem serial data channel is completely closed when a PPP > connection is shut down. I'm using a Telit Modem, which provides several > serial ports, and am right now using separate serials for the AT chat > and the data/PPP; for this reason, the AT chat continues working, but > the data channel is dead. > Something similar was happening on Qualcomm based modems from Huawei, ZTE, etc. The modem was sending a HUP on the PPP channel after PPP link was dropped. I believe the preferred solution was to send AT&C0 when initializing that port. > My question is, is it somehow necessary to re-initialise the modem data > serial channel after a PPP connection? Or could there be a conceptual > problem that I have overlooked? > This can be possible as well. See commit 7ed56d6844f8131cbf981e482b7bded8b20db7ab for another possible solution (prior to &C0) that can be used as well. Regards, -Denis -- Scanned by MailScanner.