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Summary

My USB modem fails to get mounted sometimes. If it is after a reboot (and login), it gets mounted. If it is not after a reboot (after a wake from suspend, e.g.), it absolutely fails to get mounted. lsusb shows that the modem is being detected in all the cases.

See below for details.

Normal Scenario

I connect the USB modem (after reboot) after logging in, the modem get mounted and shown as a CDROM (why?) in the launcher (though the name appears correctly). After a few minutes, a message appears in the line of, Mobile Broadband Network, You are now registered on the home network. All I have to do is to connect using the (previously configured) mobile broadband network, and then I am online.

The above happens most of the time, with a few exceptions, when the modem does not appear in the launcher at all, see below.

Alternative Scenario

  1. After a reboot and normal log in (rarely),
  2. After a wake from suspend (always),

The modem does not get mounted when inserted and does not appear in the launcher. And as a result the aforementioned message is not shown. The only way out of this is a complete reboot and trying my luck again.

However, if I issue lsusb, the output shows that the modem is indeed there,

......
Bus 001 Device 012: ID 19d2:1232 ZTE WCDMA Technologies MSM
......

I have already tried the solution mentioned here, How to Successfully Restart a USB Modem without Reboot, without avail. This one fails.

How do I force mount a USB modem?

I am using Ubuntu 15.04, fully upgraded.

EDIT

When the modem is not mounted without any error message or some such, the relevant lines in /var/log/syslog look like this. (Since there are too many lines, I have put these as an external file.)

Community
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Masroor
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  • It is always useful if you mention the Ubuntu version for anyone to understand and support your query. I've seen this in 10.04 til 12.04 if I recall as when it mounts as a CD ROM thus the device will not be usable as a modem. I'm not sure and old post that I have answered will give you a clue, but worth to look at > http://askubuntu.com/questions/414963/setting-up-beetel-bg64-3g-usb-modem-in-ubuntu-13-10-how-to/416200#416200 – AzkerM Sep 27 '15 at 17:40

1 Answers1

0

Did you read the log? 

Sep 27 22:26:17 masroor-ProBook usb_modeswitch[13534]: usb_modeswitch: add device ID 19d2:1232 to driver option
Sep 27 22:26:17 masroor-ProBook usb_modeswitch[13534]: usb_modeswitch: please report the device ID to the Linux USB developers!

I suggest that you read man usb_modeswitch; man usb_modeswitch_dispatcher; less /usr/share/doc/usb-modeswitch/README.gz to figure out how to "add device ID 19d2:1232 to driver option"

waltinator
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