Comment 7 for bug 591840

I am experiencing the very same error connecting a Nokia E73 (branded, T-Mobile USA) to a stock Ubuntu 10.04 LTS installation on 32-bit (AMD Athlon XP) system. Connecting the phone causes the ttyACM0 device to appear, but setserial cannot read the port (I assume it should?):

$ sudo setserial /dev/ttyACM0
Cannot get serial info: Invalid argument

wvdialconf finds the port and tried to communicate, but cannot:

ttyACM0<*1>: ATQ0 V1 E1 -- failed with 2400 baud, next try: 9600 baud
ttyACM0<*1>: ATQ0 V1 E1 -- failed with 9600 baud, next try: 115200 baud
ttyACM0<*1>: ATQ0 V1 E1 -- and failed too at 115200, giving up.

and this is what dmesg shows:

[1148.210033] usb 2-2.1: new full speed USB device using uhci_hcd and address 3
[ 1148.346250] usb 2-2.1: configuration #1 chosen from 1 choice
[ 1148.508731] cdc_acm 2-2.1:1.1: ttyACM0: USB ACM device
[ 1148.520508] usbcore: registered new interface driver cdc_acm
[ 1148.520817] cdc_acm: v0.26:USB Abstract Control Model driver for USB modems and ISDN adapters
[ 1148.549164] NET: Registered protocol family 35
[ 1148.562018] cdc_phonet: probe of 2-2.1:1.12 failed with error -22
[ 1148.562059] usbcore: registered new interface driver cdc_phonet
[ 1148.562671] usbcore: registered new interface driver cdc_ether
[ 1148.576645] usb 2-2.1: bad CDC descriptors
[ 1148.576708] usbcore: registered new interface driver rndis_host
[ 1148.657749] cfg80211: Calling CRDA to update world regulatory domain
[ 1148.692727] usb 2-2.1: bad CDC descriptors
[ 1148.692820] usbcore: registered new interface driver rndis_wlan
[ 1148.748737] cfg80211: World regulatory domain updated:
[ 1148.748746] (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 1148.748751] (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1148.748756] (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 1148.748761] (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 1148.748765] (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1148.748769] (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)

Additionally, the Network Manager menu never shows any Mobile Broadband connections that I go ahead and configure anyway. But perhaps this hinges on proper communication with the port? I've never used Network Manager and so don't know.

The big problem is that modemmanager was *always* installed...although I did try reinstalling it over itself. The only notable difference between my setup and Ralf's would appear to be my additional use of Gnome PPP to support a dialup connection.

There are more processes going on here than I am used to troubleshooting, so I would appreciate your feedback. I was debating whether to open a new ticket or append to this one. But let me know if you'd prefer that approach. And as my only broadband connection is on the E73, I am hoping for a fix-in-place solution instead of downloading tens of megabytes of new components. So what else would you like to know? Thanks!!!