Public bug reported:

Binary package hint: network-manager

I use Sierra aircard 775 with 9.04. It's work find but Now I had upgrade 9.04 
to 9.10. NetworkManager can find my aircard, can create the connect profile but 
I can't connect to internet. When I try to connect by networkmanager, the 
networkmanager icon run for a sec and then show me that "GSM network disconnect"
I config follow http://ubuntuforums.org/showthread.php?t=347353


r...@monggnom-laptop:~# pccardctl ident
Socket 0:
product info: "Sierra Wireless", "AC710/AC750", "GPRS Network Adapter", "R1"
manfid: 0x0192, 0x0710
function: 2 (serial)

r...@monggnom-laptop:~# dmesg | grep tty
[ 0.001523] console [tty0] enabled
[ 33.919601] ttyS0: LSR safety check engaged!
[ 33.998482] ttyS0: LSR safety check engaged!
[ 75.671612] 0.0: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
[ 220.286047] ttyS0: LSR safety check engaged!
[ 731.458749] ttyS0: LSR safety check engaged!
[ 738.777828] ttyS0: LSR safety check engaged!
[ 744.462077] ttyS0: LSR safety check engaged!
[ 5170.032818] ttyS0: LSR safety check engaged!
[ 7369.307143] 0.0: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A

r...@monggnom-laptop:~# lspci
00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 
945GT Express Memory Controller Hub (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 
943/940GML Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML 
Express Integrated Graphics Controller (rev 03)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition 
Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 
(rev 01)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 
(rev 01)
00:1c.2 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 3 
(rev 01)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI 
Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI 
Controller #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI 
Controller #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI 
Controller #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI 
Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge 
(rev 01)
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA IDE 
Controller (rev 01)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 01)
03:01.0 CardBus bridge: O2 Micro, Inc. OZ601/6912/711E0 CardBus/SmartCardBus 
Controller (rev 40)
09:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5752 Gigabit 
Ethernet PCI Express (rev 02)
0c:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN (rev 01)

I workaround by downgrade to Jaunty version. It's work.
libnm-glib0_0.7.1~rc4.1.cf199a964-0ubuntu2_i386.deb
network-manager_0.7.1~rc4.1.cf199a964-0ubuntu2_i386.deb
network-manager-gnome_0.7.1~rc4.1-0ubuntu2_i386.deb

** Affects: network-manager (Ubuntu)
     Importance: Undecided
         Status: New

-- 
Network-manager can't connect by sierra aircard 775
https://bugs.launchpad.net/bugs/481834
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