Hi Sleepy John and others,

Since people still seem to have problems I thought I should chime in and
share some of my experiences.

I had problems with connecting my E220 on 11.10 oneiric using MM
0.5-1ubuntu1 after upgrading the modem firmware to 11.117.10.02.00.
(Don't remember what firmware version I had before the upgrade.)

I found a simple workaround that allowed me to connect reliably with 
ModemManager (detailed in duplicate bug #932824): 
Prevent MM to probe /dev/ttyUSB1 by starting the command 'cat /dev/ttyUSB1' 
before MM starts its probing.

The updated version of MM currently in oneiric (which is supposed to fix
this bug?), 0.5-1ubuntu1.1, does not work for me, but my workaround
still works.

To test if you have the same problem as I have, you can try the following:
- Make sure the modem is physically disconnected.
- Open a terminal and run the command 'while true; do cat /dev/ttyUSB1; sleep 
1; done'
(Before the modem is connected you will see messages like 'cat: /dev/ttyUSB1: 
No such file or directory' once every second. After the modem is connected and 
initialized you will see messages from the modem, such as 
^BOOT:59866241,0,0,0,6 ^MODE:5,5 ^RSSI:27 and others.)
- Connect the modem to your computer.
- Connect using modem manager as usual.
Note: After ModemManager is done with its probing you can abort the cat 
/dev/ttyUSB1 command.

If this workaround works for you, you might want to try the "ports"
branch of ModemManager which Aleksander Morgado mentioned in comment
#145 (with more info available in the comments before and after). I've
been using the ports branch since February and it has been working
perfectly all the time.

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https://bugs.launchpad.net/bugs/868034

Title:
  Huawei E220 and E1550 can't connect on Ubuntu 11.10

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