Comment 41 for bug 334122

@Jonathan Thomas in comment #39

Using a Hauwei E270 adapter in Kubuntu Karmic do not work by default for me neither, but by investigating the problem in Jaunty I've found a way to make it work with both Karmic and Jaunty (with KDE 4.3.x and a plasma-widget-networkmanagment grater than 0.1~svn100XXXX-0ubuntuX).

In Karmic since at least Alpha 6 I think, the OS do not detect the USB dongle on the first connection. Disconnecting and reconnecting it one or two times makes the OS detect the hardware correct as a GSM modem (se the attached dmesg.log for a two time reconnection). This must be a kernel issue, as Jaunty detects it fine on first go.

To make a connection with plasma-widget-networkmanagment (PWN) I just manual edit the appropriate connection-file from "/home/your-user-name/.kde/share/apps/networkmanagement/connections/". As of "PWN 0.1~svn1023224-0ubuntu1" I in fact only need to edit the [serial] section of the file and correct every single value here. To make PWN use the edited connection-profile a REBOOT IS DEMANDED, not doing so makes PWN use the wrong values created by the GUI (seen in daemon.log when trying to connect after editing the file).

Attaching a NotWorking profile created with the GUI, and a Working profile corrected by hand.

Linux K9-10 2.6.31-11-generic #36-Ubuntu SMP Fri Sep 25 06:37:51 UTC 2009 i686 GNU/Linux
network-manager-0.8~a~git.20090923t064445.b20cef2-0ubuntu1
plasma-widget-networkmanager-0.1~svn1023224-0ubuntu1

BTW I know a restart of the network-manager daemon sometimes can replace a reboot. Additional I have disabled the PIN code request on the dongle (SIM).