Re: Huawei 160G fails to connect with modem-manager 0.4

[Jirka Klimes <jklimes redhat com>]

On Tuesday 17 of August 2010 14:08:23 Christian Speckner wrote:
> Hi all!
> 
> After upgrading my gentoo system, I'd like to chime in on an issue
> already raised by Tassilo Horn in July: I've got a Huawei 160G UMTS USB
> modem ("O2 surfstick" in germany) which worked fine with network-manager
> <= 0.7.2 before the upgrade.
> 
> After upgrading to network-manager 0.8 and modem-manager 0.4, any
> connection attempt via network-manager fails with
> "option_instat_callback: error -71" appearing in the dmesg and the
> device subsequently resetting. Downgrading to modem-manager 0.3 resolves
> the issue. The issue looks to be completely identical with the one
> previously reported by Tassilo Horn.
> 
> To me, it looks like some particular command (sequence?) from
> modem-manager is triggering a glitch in the device firmware. I don't
> have much time for further debugging right now, but please tell me if
> you need more information; I'll try to provide it as I soon as I find time.
> 
> Cheers
> 	-Christian

Thanks for reporting!

It would be useful if you can follow the steps at [1] in 'Debugging 
NetworkManager 0.8.x 3G connections' section and post the log here.

What is the kernel version?

Jirka

[1] http://live.gnome.org/NetworkManager/Debugging