Still broken after today's updates:

modemmanager                               
0.2.git.20090806t105932.354a4cb-0ubuntu3
network-manager                            
0.8~a~git.20090820t182117.cb60390-0ubuntu2

Having seen Bug 412570 and Bug 413333, here is some additional data
(first the modem-manager trace and the syslog output from the broken
Karmic, followed by syslog output from still functioning Jaunty):

-------------------------------------------------------------------------
BROKEN WITH KARMIC:

r...@karmic:~#  killall -9 modem-manager NetworkManager
r...@karmic:~#  modem-manager --debug
  [NetworkManager is restarted in another tab, followed by several connect 
attempts]
** Message: Loaded plugin Huawei
** Message: Loaded plugin Sierra
** Message: Loaded plugin Option High-Speed
** Message: Loaded plugin MotoC
** Message: Loaded plugin Gobi
** Message: Loaded plugin Novatel
** Message: Loaded plugin Option
** Message: Loaded plugin Ericsson MBM
** Message: Loaded plugin Nokia
** Message: Loaded plugin Generic
** Message: Loaded plugin ZTE
** Message: (ttyACM0) opening serial device...
** (modem-manager:4928): DEBUG: (ttyACM0): probe requested by plugin 'Generic'
** (modem-manager:4928): DEBUG: (ttyACM0): --> 'AT+GCAP<CR>'
** (modem-manager:4928): DEBUG: (ttyACM0): <-- '<CR><LF>+GCAP: +CIS707-A, 
CIS-856, CIS-856-A<CR><LF><CR><LF>OK<CR><LF>'
** Message: (ttyACM0) closing serial device...
** Message: (Generic): CDMA modem /sys/devices/pci0000:00/0000:00:1a.1/usb4/4-1 
claimed port ttyACM0
** (modem-manager:4928): DEBUG: Added modem 
/sys/devices/pci0000:00/0000:00:1a.1/usb4/4-1
** (modem-manager:4928): DEBUG: Exported modem 
/sys/devices/pci0000:00/0000:00:1a.1/usb4/4-1 as 
/org/freedesktop/ModemManager/Modems/0
** Message: (ttyACM0) opening serial device...
** (modem-manager:4928): DEBUG: (ttyACM0): --> 'ATZ E0 V1 X4 &C1<CR>'
** (modem-manager:4928): DEBUG: (ttyACM0): <-- '<CR><LF>OK<CR><LF>'
** (modem-manager:4928): DEBUG: (ttyACM0): --> 'AT+CMEE=1<CR>'
** (modem-manager:4928): DEBUG: (ttyACM0): <-- '<CR><LF>ERROR<CR><LF>'
** (modem-manager:4928): DEBUG: Got failure code 100: Unknown error

** (modem-manager:4928): WARNING **: Your CDMA modem does not support +CMEE 
command
** (modem-manager:4928): DEBUG: (ttyACM0): --> 'ATDT#777<CR>'
** (modem-manager:4928): DEBUG: (ttyACM0): <-- '<CR><LF>NO CARRIER<CR><LF>'
** (modem-manager:4928): DEBUG: (ttyACM0): --> 'ATZ E0 V1 X4 &C1<CR>'
** (modem-manager:4928): DEBUG: (ttyACM0): <-- '<CR><LF>OK<CR><LF>'
** (modem-manager:4928): DEBUG: (ttyACM0): --> 'AT+CMEE=1<CR>'
** (modem-manager:4928): DEBUG: (ttyACM0): <-- '<CR><LF>ERROR<CR><LF>'
** (modem-manager:4928): DEBUG: Got failure code 100: Unknown error

** (modem-manager:4928): WARNING **: Your CDMA modem does not support +CMEE 
command
** (modem-manager:4928): DEBUG: (ttyACM0): --> 'ATDT#777<CR>'
** (modem-manager:4928): DEBUG: (ttyACM0): --> 'ATZ E0 V1 X4 &C1<CR>'
** (modem-manager:4928): DEBUG: (ttyACM0): <-- '<CR><LF>NO CARRIER<CR><LF>'
** (modem-manager:4928): DEBUG: Got failure code 3: No carrier
** (modem-manager:4928): DEBUG: (ttyACM0): --> 'ATZ E0 V1 X4 &C1<CR>'
** (modem-manager:4928): DEBUG: (ttyACM0): <-- '<CR><LF>OK<CR><LF>'
** (modem-manager:4928): DEBUG: (ttyACM0): --> 'AT+CMEE=1<CR>'
** (modem-manager:4928): DEBUG: (ttyACM0): <-- '<CR><LF>ERROR<CR><LF>'
** (modem-manager:4928): DEBUG: Got failure code 100: Unknown error

** (modem-manager:4928): WARNING **: Your CDMA modem does not support +CMEE 
command
** (modem-manager:4928): DEBUG: (ttyACM0): --> 'ATDT#777<CR>'
** (modem-manager:4928): DEBUG: (ttyACM0): --> 'ATZ E0 V1 X4 &C1<CR>'
** (modem-manager:4928): DEBUG: (ttyACM0): <-- '<CR><LF>NO CARRIER<CR><LF>'
** (modem-manager:4928): DEBUG: Got failure code 3: No carrier

/var/log/syslog:

Aug 20 18:46:25 karmic kernel: [  102.280272] cdc_acm 4-1:1.0: ttyACM0: USB ACM 
device
Aug 20 18:46:25 karmic kernel: [  102.282573] usbcore: registered new interface 
driver cdc_acm
Aug 20 18:46:25 karmic kernel: [  102.282577] cdc_acm: v0.26:USB Abstract 
Control Model driver for USB modems and ISDN adapters
Aug 20 18:46:25 karmic modem-manager: (ttyACM0) opening serial device...
Aug 20 18:46:25 karmic modem-manager: (ttyACM0): probe requested by plugin 
'Generic'
Aug 20 18:46:26 karmic modem-manager: (ttyACM0) closing serial device...
Aug 20 18:46:26 karmic modem-manager: (Generic): CDMA modem 
/sys/devices/pci0000:00/0000:00:1a.1/usb4/4-1 claimed port ttyACM0
Aug 20 18:46:26 karmic modem-manager: Added modem 
/sys/devices/pci0000:00/0000:00:1a.1/usb4/4-1
Aug 20 18:46:26 karmic modem-manager: Exported modem 
/sys/devices/pci0000:00/0000:00:1a.1/usb4/4-1 as 
/org/freedesktop/ModemManager/Modems/0
Aug 20 18:46:26 karmic NetworkManager: <info>  (ttyACM0): new CDMA device 
(driver: 'cdc_acm')
Aug 20 18:46:26 karmic NetworkManager: <info>  (ttyACM0): exported as 
/org/freedesktop/NetworkManager/Devices/2
Aug 20 18:46:26 karmic NetworkManager: <info>  (ttyACM0): now managed
Aug 20 18:46:26 karmic NetworkManager: <info>  (ttyACM0): device state change: 
1 -> 2 (reason 2)
Aug 20 18:46:26 karmic NetworkManager: <info>  (ttyACM0): deactivating device 
(reason: 2).
Aug 20 18:46:26 karmic NetworkManager: flush_routes: assertion `iface_idx >= 0' 
failed
Aug 20 18:46:26 karmic NetworkManager: flush_addresses: assertion `iface_idx >= 
0' failed
Aug 20 18:46:26 karmic NetworkManager: <info>  (ttyACM0): device state change: 
2 -> 3 (reason 0)
Aug 20 18:46:26 karmic NetworkManager: <info>  Activation (ttyACM0) starting 
connection 'Auto Mobile Broadband (CDMA) connection'
Aug 20 18:46:26 karmic NetworkManager: <info>  (ttyACM0): device state change: 
3 -> 4 (reason 0)
Aug 20 18:46:26 karmic NetworkManager: <info>  Activation (ttyACM0) Stage 1 of 
5 (Device Prepare) scheduled...
Aug 20 18:46:26 karmic NetworkManager: <info>  Activation (ttyACM0) Stage 1 of 
5 (Device Prepare) started...
Aug 20 18:46:26 karmic NetworkManager: <info>  Activation (ttyACM0) Stage 1 of 
5 (Device Prepare) complete.
Aug 20 18:46:26 karmic modem-manager: (ttyACM0) opening serial device...
Aug 20 18:46:26 karmic modem-manager: Got failure code 100: Unknown error
Aug 20 18:46:26 karmic modem-manager: Your CDMA modem does not support +CMEE 
command
Aug 20 18:46:27 karmic modem-manager: Got failure code 3: No carrier
Aug 20 18:46:27 karmic NetworkManager: <WARN>  stage1_prepare_done(): CDMA 
modem connection failed: No carrier
Aug 20 18:46:27 karmic NetworkManager: <info>  (ttyACM0): device state change: 
4 -> 9 (reason 0)
Aug 20 18:46:27 karmic NetworkManager: <info>  Marking connection 'Auto Mobile 
Broadband (CDMA) connection' invalid.
Aug 20 18:46:27 karmic NetworkManager: <info>  Activation (ttyACM0) failed.
Aug 20 18:46:27 karmic NetworkManager: <info>  (ttyACM0): device state change: 
9 -> 3 (reason 0)
Aug 20 18:46:27 karmic NetworkManager: <info>  (ttyACM0): deactivating device 
(reason: 0).
Aug 20 18:46:27 karmic NetworkManager: <info>  Policy set 'Auto eth0' (eth0) as 
default for routing and DNS.
Aug 20 18:46:27 karmic NetworkManager: flush_routes: assertion `iface_idx >= 0' 
failed
Aug 20 18:46:27 karmic NetworkManager: flush_addresses: assertion `iface_idx >= 
0' failed


-------------------------------------------------------------------------
WORKING WITH JAUNTY:
Aug 20 18:41:22 jaunty NetworkManager: <info>  Activation (ttyACM0) starting 
connection 'Auto Mobile Broadband (CDMA) connection' 
Aug 20 18:41:22 jaunty NetworkManager: <info>  (ttyACM0): device state change: 
3 -> 4 
Aug 20 18:41:22 jaunty NetworkManager: <info>  Activation (ttyACM0) Stage 1 of 
5 (Device Prepare) scheduled... 
Aug 20 18:41:22 jaunty NetworkManager: <info>  Activation (ttyACM0) Stage 1 of 
5 (Device Prepare) started... 
Aug 20 18:41:22 jaunty NetworkManager: <debug> [1250808082.373918] 
nm_serial_device_open(): (ttyACM0) opening device... 
Aug 20 18:41:22 jaunty NetworkManager: <info>  Activation (ttyACM0) Stage 1 of 
5 (Device Prepare) complete. 
Aug 20 18:41:22 jaunty NetworkManager: <info>  (ttyACM0): powering up... 
Aug 20 18:41:23 jaunty NetworkManager: <info>  Connected, Woo! 
Aug 20 18:41:23 jaunty NetworkManager: <info>  Activation (ttyACM0) Stage 2 of 
5 (Device Configure) scheduled... 
Aug 20 18:41:23 jaunty NetworkManager: <info>  Activation (ttyACM0) Stage 2 of 
5 (Device Configure) starting... 
Aug 20 18:41:23 jaunty NetworkManager: <info>  (ttyACM0): device state change: 
4 -> 5 
Aug 20 18:41:23 jaunty NetworkManager: <info>  Starting pppd connection 
Aug 20 18:41:23 jaunty NetworkManager: <debug> [1250808083.526436] 
nm_ppp_manager_start(): Command line: /usr/sbin/pppd nodetach lock 
nodefaultroute user *******[email protected] ttyACM0 noipdefault noauth usepeerdns 
lcp-echo-failure 0 lcp-echo-interval 0 ipparam 
/org/freedesktop/NetworkManager/PPP/1 plugin 
/usr/lib/pppd/2.4.4/nm-pppd-plugin.so 
Aug 20 18:41:23 jaunty NetworkManager: <debug> [1250808083.528161] 
nm_ppp_manager_start(): ppp started with pid 5652 
Aug 20 18:41:23 jaunty NetworkManager: <info>  Activation (ttyACM0) Stage 2 of 
5 (Device Configure) complete. 
Aug 20 18:41:23 jaunty pppd[5652]: Plugin /usr/lib/pppd/2.4.4/nm-pppd-plugin.so 
loaded.
Aug 20 18:41:23 jaunty pppd[5652]: pppd 2.4.5 started by root, uid 0
Aug 20 18:41:23 jaunty pppd[5652]: Using interface ppp0
Aug 20 18:41:23 jaunty pppd[5652]: Connect: ppp0 <--> /dev/ttyACM0
Aug 20 18:41:23 jaunty NetworkManager: <info>  (ttyACM0): device state change: 
5 -> 6 
Aug 20 18:41:23 jaunty NetworkManager: <info>  (ttyACM0): device state change: 
6 -> 7 
Aug 20 18:41:23 jaunty pppd[5652]: Cannot determine ethernet address for proxy 
ARP
Aug 20 18:41:23 jaunty pppd[5652]: local  IP address 98.104.129.144
Aug 20 18:41:23 jaunty pppd[5652]: remote IP address 75.116.241.29
Aug 20 18:41:23 jaunty pppd[5652]: primary   DNS address 75.116.63.154
Aug 20 18:41:23 jaunty pppd[5652]: secondary DNS address 75.116.127.154
Aug 20 18:41:23 jaunty NetworkManager: <info>  PPP manager(IP Config Get) reply 
received. 
Aug 20 18:41:23 jaunty NetworkManager: <info>  Activation (ttyACM0) Stage 4 of 
5 (IP Configure Get) scheduled... 
Aug 20 18:41:23 jaunty NetworkManager: <info>  Activation (ttyACM0) Stage 4 of 
5 (IP Configure Get) started... 
Aug 20 18:41:23 jaunty NetworkManager: <info>  Activation (ttyACM0) Stage 5 of 
5 (IP Configure Commit) scheduled... 
Aug 20 18:41:23 jaunty NetworkManager: <info>  Activation (ttyACM0) Stage 4 of 
5 (IP Configure Get) complete. 
Aug 20 18:41:23 jaunty NetworkManager: <info>  Activation (ttyACM0) Stage 5 of 
5 (IP Configure Commit) started... 
Aug 20 18:41:24 jaunty NetworkManager: nm_ip4_config_add_nameserver: assertion 
`nameserver != s' failed
Aug 20 18:41:24 jaunty last message repeated 3 times
Aug 20 18:41:24 jaunty NetworkManager: <info>  Policy set 'Auto eth0' (eth0) as 
default for routing and DNS. 
Aug 20 18:41:24 jaunty NetworkManager: <info>  (ttyACM0): device state change: 
7 -> 8 
Aug 20 18:41:24 jaunty NetworkManager: <info>  Activation (ttyACM0) successful, 
device activated. 
Aug 20 18:41:24 jaunty NetworkManager: <info>  Activation (ttyACM0) Stage 5 of 
5 (IP Configure Commit) complete. 
Aug 20 18:41:25 jaunty ntpdate[5727]: adjust time server 91.189.94.4 offset 
-0.064557 sec
-------------------------------------------------------------------------


** Summary changed:

- [KARMIC][REGRESSION] Network Manager no longer works with UM-175 (current 
Verizon/Alltel wireless broadband modem)
+ [KARMIC][REGRESSION] Network Manager .8 broken with UM175 (Verizon/Alltel 
wireless)

-- 
[KARMIC][REGRESSION] Network Manager .8 broken with UM175 (Verizon/Alltel 
wireless)
https://bugs.launchpad.net/bugs/414604
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