On Mon, Nov 26, 2012 at 10:26 AM, Dan Williams <[email protected]> wrote: > On Fri, 2012-11-23 at 17:33 -0800, Kelsey Sigurdur wrote: >> Hi folks, >> >> Newb here. As the subject says, GetSignalQuality() is failing with >> the error "Could not parse the +CIND response" when connected to the >> network. When disconnected but enabled GetSignalQuality() properly >> returns a value. >> >> I'm just looking to find out if this is a issue with the hardware or >> perhaps a bug in ModemManager. >> >> I've scoured the archives as far back as January 2011 and the closest >> problem to mine that I've found so far is the following thread, which >> wasn't followed up on: >> >> "Re: how to get signal strength of EVDO modem" >> https://mail.gnome.org/archives/networkmanager-list/2011-January/msg00073.html > > So here's what's going on. > > 1) you don't appear to have the sierra_net driver on your system, or if > you do, it's not bound to the USB 306. The USB 306 should expose a > network port as well as a few serial TTYs, and ModemManager should pick > that network port up. The logs you posted indicate that the kernel > isn't binding sierra_net to the USB 306, so this appears to be a kernel > or modeswitch issue. > > 2) Because there's no network port, you only get one full-featured AT > command port, which is used for PPP while connected. The other > AT-capable ports have limited AT command parsers which do not allow the > AT+CIND command, which is why you get that error. However, there's a > bug in ModemManager where it should just report the signal quality > obtained by +CSQ instead of returning an error. > > So, I'd suggest finding out why sierra_net isn't getting used, but I'll > also fix the MM bug too. > > Dan >
Thanks Dan. I do have the sierra_net driver on my system but you are correct that it's not getting bound to the device. For now I'm guessing it's a kernel issue. Google, and my rudimentary understanding of C, suggests that the USB 306 is blacklisted in sierra.c but would work with a firmware version >= M3.0. Unfortunately, the Sierra Wireless site offers only M2_0_11_10AP as the latest firmware for this device. See http://lwn.net/Articles/385096/ if you're interested in where I came across the blacklist info. I'm off to investigate modeswitching. Thanks for the tips, I appreciate it. _______________________________________________ networkmanager-list mailing list [email protected] https://mail.gnome.org/mailman/listinfo/networkmanager-list
