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0e1f616
(Get the code!)
Hmm. No joy with 2.6.31.15 either with E220. In fact a whole bunch of bugs...
* I have the "disconnects almost immediately, after connection initiaetd from network manger" behavior.
* I also have a mode where the E220 light goes out completely, and the device disappears from lsusb. This seems to be a crashed-modem state, and only unplugging/
* Also, if you leave the modem plugged in but not connected, you can get a dialog box repeatedly popping up saying "Unable to mount MOBILE_CONNECT /n Error mounting: mount exited with exit code 1: helper failed with /n mount:block device /dev/sr0 is write protected, mounting read-only /n mount: /dev/sr0 is not a valid block device", associated with a few more green flashes of the modem light than usual. (not sure if this always happens.)
* Sometimes when I try to connect, it pops up a dialog with "A password is required to connect to 'T-mobile' /n HUAWEI technologies HUAWEI mobile" and a password entry field. And sometimes it doesn't need this. But even if you enter the correct password at this point, it doesn't seem to help. [this behavior existed in 8.10 too, and was usually cured by system restart ]
* Behavior seems to be different depending on whether the modem is present at boot time or not.
Can someone indicate which modem software upgrade is considered good? [I upgraded a while ago, and the version I installed worked flawlessly with 8.10.]
In case it's relevant, I'm a T-Mobile user in the UK. And I used the menu option for "Connection Information" (right-click over networking icon) to delete t-mobile entry, then rebooted and inserted new entry using T-mobile defaults. (The old entry had manual DNS servers, but the default auto-IPv4 settings didn't seem to make any difference, at least during the short connection attempt). Still doing the almost-immediate disconnect thing.