can't connect to mobile broadband with Huawei K3770 after suspending and resuming

[Teo]

After suspending and resuming, network manager won't connect to a mobile broadband connection that usually works. Sakis3g will always connect.

More details:
I have a Huawei K3770 mobile broadband usb modem. I have it set up to automatically do the usb_modeswitch when plugged, which works. All I have to do to connect is:
- plug the modem in and wait a few seconds
- in network manager, select the mobile broadband network to connect

However, after suspend/resume (with the modem already plugged in), if I go to network manager and I connect to the network, it will fail. It tries to connect and then the message "disconnected" appears.

Then I run sakis3G and it always succeeds to connect, so network manager should be able to connect as well.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: network-manager 0.9.1.90-0ubuntu5
ProcVersionSignature: Ubuntu 3.0.0-13.22-generic 3.0.6
Uname: Linux 3.0.0-13-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu4
Architecture: i386
CRDA: Error: [Errno 2] No such file or directory
Date: Fri Dec 9 11:03:51 2011
IfupdownConfig:
 auto lo
 iface lo inet loopback
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
IpRoute:
 default via 10.64.64.64 dev ppp0
 10.64.64.64 dev ppp0 proto kernel scope link src 77.210.0.111
Keyfiles: Error: [Errno 2] No such file or directory
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: Upgraded to oneiric on 2011-12-07 (1 days ago)

[Thomas Hood (jdthood)]

This modem isn't listed at either

    https://wiki.ubuntu.com/NetworkManager/Hardware/3G/

or

    https://live.gnome.org/NetworkManager/MobileBroadband

as a supported model. Please file a request upstream at

    https://bugzilla.gnome.org/browse.cgi?product=NetworkManager

asking for support to be added.

[Teo (teo1978)]

I think you missed the part where I said the modem usually works, until I suspend and resume

[Thomas Hood (jdthood)]

That is something you should mention in your upstream bug report. It indicates that it's not a lot of work to add complete support for the K3770.