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View Full Version : [SOLVED] Modem disconnects LTS 10.04 Live USB



jwalling
October 16th, 2010, 02:22 AM
I use an analog modem and wifi to access the internet.

I am using Ubuntu LTS 8.04 on a laptop and have an analog modem connected via USB serial cable. The dialup feature and the modem work flawlessly.

I am testing LTS 10.04.1 on a live USB drive that I purchased preinstalled from On-Disk.

On the live USB drive, I am able to get a dialup connection with my ISP long enough to pull up a web page with the browser. However, the analog modem disconnects within minutes with exit codes 16 or 17.

Man pppd:
16 The link was terminated by the modem hanging up.
17 The PPP negotiation failed because serial loopback was detected.

My questions are, how to do I track down the dialup setting(s), or file configuration(s) that is causing the disconnects? Is the problem likely due to a poorly worded AT modem command?

I want to get this problem resolved before I proceed with upgrading from 8.04 to 10.04.1. Thanks for your suggestions.

===============
I found a possible solution: pppd nomagic
I am using Gnome PPP. Where/how do I add the nomagic option to pppd?

mrgs
October 16th, 2010, 09:14 PM
Maybe a little off topic:

Any Ubuntu release will need a steady stream of downloaded bugfixes, often more than 20 MB in one go. I would not recommend trying this over a dial-up modem.

jwalling
October 17th, 2010, 01:21 AM
Maybe a little off topic:

Any Ubuntu release will need a steady stream of downloaded bugfixes, often more than 20 MB in one go. I would not recommend trying this over a dial-up modem.

I don't use dialup for Ubuntu updates. I use wifi for large downloads.
I use dialup in one location that doesn't have wifi or broadband access.

jwalling
October 17th, 2010, 05:50 AM
I reproduced the error message
"The PPP daemon has died. (exit code = 17)"
on the laptop running 8.04 by using the wvdial command and Gnome-PPP

The error doesn't occur when running pppconfig & pon/poff on the same platform under running Ubuntu 8.04.

wvdial command uses /etc/wvdial.conf.

It looks like pppconfig & pon/poff does not have the same problem as Gnome-PPP/wvdial.