Installing USB modem on Ubuntu 14.04

decenter · 05-02-2014, 02:19 AM

I'm trying to connect to internet using Teracom T -U500 USB modem. When I insert it, my dmesg shows:

Quote:

[ 3895.188034] usb 3-2: new full-speed USB device number 4 using uhci_hcd
[ 3895.355048] usb 3-2: New USB device found, idVendor=15eb, idProduct=7153
[ 3895.355053] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=11
[ 3895.355057] usb 3-2: Product: CBP7.0
[ 3895.355060] usb 3-2: Manufacturer: China TeleCom
[ 3895.355064] usb 3-2: SerialNumber: \xffffffc3\xffffffbf\xffffffbf\xffffffc3\xffffffbf\xffffffbf\xffffffc3\xffffffbf\xffffffbf\xffffffc3 \xffffffbf\xffffffbf\xffffffc3\xffffffbf\xffffffbf\xffffffc3\xffffffbf\xffffffbf\xffffffc3\xffffffbf \xffffffbf\xffffffc3\xffffffbf\xffffffbf\xffffffc3\xffffffbf\xffffffbf\xffffffc3\xffffffbf\xffffffbf
[ 3895.363081] usb-storage 3-2:1.0: USB Mass Storage device detected
[ 3895.363153] scsi10 : usb-storage 3-2:1.0
[ 3896.364078] scsi 10:0:0:0: CD-ROM EVDO ReV A 7.00 PQ: 0 ANSI: 2
[ 3896.376056] sr1: scsi-1 drive
[ 3896.376211] sr 10:0:0:0: Attached scsi CD-ROM sr1
[ 3896.376275] sr 10:0:0:0: Attached scsi generic sg2 type 5
[ 3896.426579] systemd-udevd[10874]: Failed to apply ACL on /dev/sr1: No such file or directory
[ 3896.426589] systemd-udevd[10874]: Failed to apply ACL on /dev/sr1: No such file or directory
[ 3896.431477] systemd-udevd[10855]: Failed to apply ACL on /dev/sr1: No such file or directory
[ 3896.431487] systemd-udevd[10855]: Failed to apply ACL on /dev/sr1: No such file or directory
[ 3896.435025] systemd-udevd[10855]: Failed to apply ACL on /dev/sr1: No such file or directory
[ 3896.435034] systemd-udevd[10855]: Failed to apply ACL on /dev/sr1: No such file or directory

I'm not sure why it fails to apply ACL on device. What does it mean?

I use Ubuntu 14.04.

ondoho · 05-02-2014, 02:55 AM

is this about mobile broadband?
are you trying to connect to the internet?
have you tried to set up a "New mobile broadband connection" from network manager? there's an icon in your system tray?

decenter · 05-02-2014, 07:50 AM

Yes, this is about connecting to mobile broadband. When I insertthe modem, there is no sign in the network tray icon. We need to do it manually.

ondoho · 05-02-2014, 10:36 AM

you have to click on the network icon (right or left, don't remember), which should then present you with a pop-up menu.
is one of the items "New mobile broadband connection..." or sth like that?

decenter · 05-02-2014, 11:12 AM

I resolved the above issue. I disabled usb switching in the config file /etc/usb_modeswitch.conf. Then I was able to mount the modem storage device as /dev/sr1 and I ejected it manually to activate the modem. Then I got the "New CDMA connection available" messsage and I went through the wizard and still I coudn't connect to the internet. Here's the syslog message:

Quote:

ay 2 20:36:06 jessi-desktop ModemManager[606]: <info> Modem /org/freedesktop/ModemManager1/Modem/1: state changed (disabled -> enabling)
May 2 20:36:06 jessi-desktop NetworkManager[658]: <info> (ttyUSB2) modem state changed, 'disabled' --> 'enabling' (reason: user-requested)
May 2 20:36:07 jessi-desktop ModemManager[606]: <warn> couldn't load Supported Charsets: 'Unknown error'
May 2 20:36:07 jessi-desktop ModemManager[606]: <warn> Could not get serving system: Unknown error
May 2 20:36:07 jessi-desktop ModemManager[606]: <info> Modem /org/freedesktop/ModemManager1/Modem/1: state changed (enabling -> disabled)
May 2 20:36:07 jessi-desktop NetworkManager[658]: <info> (ttyUSB2) modem state changed, 'enabling' --> 'disabled' (reason: unknown)
May 2 20:36:07 jessi-desktop NetworkManager[658]: <warn> (ttyUSB2) failed to enable modem: GDBus.Error

rg.freedesktop.ModemManager1.Error.MobileEquipment.Unknown: Unknown error
May 2 20:36:08 jessi-desktop NetworkManager[658]: <info> Activation (ttyUSB2) starting connection 'BSNL/CellOne New GPRS/3G'
May 2 20:36:08 jessi-desktop NetworkManager[658]: <info> (ttyUSB2): device state change: disconnected -> prepare (reason 'none') [30 40 0]
May 2 20:36:08 jessi-desktop NetworkManager[658]: <info> Activation (ttyUSB2) Stage 1 of 5 (Device Prepare) scheduled...
May 2 20:36:08 jessi-desktop NetworkManager[658]: <info> Activation (ttyUSB2) Stage 1 of 5 (Device Prepare) started...
May 2 20:36:08 jessi-desktop NetworkManager[658]: <info> (ttyUSB2): device state change: prepare -> need-auth (reason 'none') [40 60 0]
May 2 20:36:08 jessi-desktop NetworkManager[658]: <info> Activation (ttyUSB2) Stage 1 of 5 (Device Prepare) complete.
May 2 20:36:08 jessi-desktop NetworkManager[658]: <info> Activation (ttyUSB2) Stage 1 of 5 (Device Prepare) scheduled...
May 2 20:36:08 jessi-desktop NetworkManager[658]: <info> Activation (ttyUSB2) Stage 1 of 5 (Device Prepare) started...
May 2 20:36:08 jessi-desktop NetworkManager[658]: <info> (ttyUSB2): device state change: need-auth -> prepare (reason 'none') [60 40 0]
May 2 20:36:08 jessi-desktop NetworkManager[658]: <info> Activation (ttyUSB2) Stage 1 of 5 (Device Prepare) complete.
May 2 20:36:08 jessi-desktop ModemManager[606]: <info> Simple connect started...
May 2 20:36:08 jessi-desktop ModemManager[606]: <info> Simple connect state (3/8): Enable
May 2 20:36:08 jessi-desktop ModemManager[606]: <info> Modem /org/freedesktop/ModemManager1/Modem/1: state changed (disabled -> enabling)
May 2 20:36:08 jessi-desktop NetworkManager[658]: <info> (ttyUSB2) modem state changed, 'disabled' --> 'enabling' (reason: user-requested)
May 2 20:36:08 jessi-desktop ModemManager[606]: <warn> couldn't load Supported Charsets: 'Unknown error'
May 2 20:36:08 jessi-desktop ModemManager[606]: <warn> Could not get serving system: Unknown error
May 2 20:36:08 jessi-desktop ModemManager[606]: <info> Modem /org/freedesktop/ModemManager1/Modem/1: state changed (enabling -> disabled)
May 2 20:36:08 jessi-desktop NetworkManager[658]: <info> (ttyUSB2) modem state changed, 'enabling' --> 'disabled' (reason: unknown)
May 2 20:36:08 jessi-desktop NetworkManager[658]: <warn> (ttyUSB2) failed to connect modem: Unknown error
May 2 20:36:08 jessi-desktop NetworkManager[658]: <info> (ttyUSB2): device state change: prepare -> failed (reason 'unknown') [40 120 1]
May 2 20:36:08 jessi-desktop NetworkManager[658]: <warn> Activation (ttyUSB2) failed for connection 'BSNL/CellOne New GPRS/3G'
May 2 20:36:08 jessi-desktop NetworkManager[658]: <info> (ttyUSB2): device state change: failed -> disconnected (reason 'none') [120 30 0]
May 2 20:36:08 jessi-desktop NetworkManager[658]: <info> (ttyUSB2): deactivating device (reason 'none') [0]