On Sun, 2011-11-13 at 00:35 +0200, Uwe Geuder wrote: > Hi! > > I have a Nokia 3G USB Modem CS-17. Unfortunately it works very > unreliable under Linux. If used it with Ubuntu Lucid 10.04 LTS, > OpenSUSE 11.3, OpenSUSE 11.4, and Windows XP. > > Under Linux the failure rate is some 60%-80% and retrying repeatedly > does not help. Under XP the failure rate is some 10% and if the first > attempt fails retrying helps.
Based on our IRC debugging yesterday, I've gone ahead and pushed a fix to ModemManager that uses only USB interface 0 for PPP on these devices since that's what the Windows driver indicates. The driver didn't have a section for your variant of the CS-17 (0x0623) but I added that USB ID anyway. Dan > If the connection succeeds it is typically very good. I have used it > about 1 hour on a running train and I have reached connection speeds > up to 5 Mbit/s (not on a running train though...) > > The attached logs are from Lucid, which uses NetworkManager 0.8-0ubuntu3.2 > and modem-manager 0.3-0ubuntu2.2. > > The typical error case is no responses from LCP (see attached logs). In some > rarer occasions the LCP responses are invalid. > > Not sure how this is related to network manager. But Linux PPP seems to be > stable (in the meaning of no changes) for a long time. And it should not be > a network issue, with XP I don't experience the same problem. > > Can you spot anything helpful from the attached logs? > > Does it make any sense to investigate with nm 0.8? If necessary I can > build the newest version. But I vaguely remember from some earlier > postings on this list that it's not completely trivial with all the > interdependencies of NetworkManager, modem-manager, D-Bus, > configuration in /etc, knetworkmanager[1], and what else might needed > to be taken into account. So a pointer to instructions would be > welcome. > > Regards, > > Uwe > > > [1] I typically use KDE. But I have at least tried it once on a GNOME > system and the connection problems were the same ones. I cannot > imagine that the applet is the culprit. > _______________________________________________ networkmanager-list mailing > list [email protected] > http://mail.gnome.org/mailman/listinfo/networkmanager-list _______________________________________________ networkmanager-list mailing list [email protected] http://mail.gnome.org/mailman/listinfo/networkmanager-list
