I have found many errors related to this problem in logs.
First, nm-applet gives
** (nm-applet:32060): WARNING **: Error in getting active connection 'Vpn' property: (19) Method "Get" with signature "ss" on interface "org.freedesktop.DBus.Properties" doesn't exist
** (nm-applet:32060): WARNING **: _nm_object_array_demarshal: couldn't create object for /org/freedesktop/NetworkManager/ActiveConnection/56
Second, dmesg gives
[253846.006408] option: option_instat_callback: error -108
[253846.006795] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[253846.010641] option 2-3:1.0: device disconnected
There are errors from
Dec 10 03:32:49 ubuntu-main pppd: LCP terminated by peer
Dec 10 03:32:49 ubuntu-main pppd: Connect time 26.2 minutes.
Dec 10 03:32:49 ubuntu-main pppd: Sent 857127 bytes, received 3813495 bytes.
Dec 10 03:32:49 ubuntu-main pppd: Modem hangup
Dec 10 03:32:49 ubuntu-main pppd: Connection terminated.
It seems that my Internet service provider (ISP) terminates the connection and network-manager is not capable to make auto-reconnection.
Here is a solution I have found.
Try the to run the following two lines it the terminal:
sudo killall modem-manager nm-applet
modem-manager & nm-applet
If you can reconnect after that - this solution is for you.
In fact, this is just a restart for
This could be the end but I decided to write a script to make it automatically cause due to my ISP I could be disconnected many time per day.
I wrote the script in python that check Internet connection every minute and run the above mentioned commands to make reconnection if its necessary. Here is the script.
#!/usr/bin/env python """ auto-reconnect.py - a code to accomplish auto reconnection to the internet source: http://best-ubuntu-notebook.blogspot.com/ python version '2.6.5' """ import urllib2,os,time #loading from a file def download_lines(name): inputfile = open(name, 'r') # open file for reading lines = inputfile.readlines() inputfile.close() return lines.replace('\n','') #checking function def check_connection (site): print 'Checking connection...' req = urllib2.Request(site) flag=False try: u = urllib2.urlopen(req) except urllib2.URLError, e: print 'URLError' except urllib2.HTTPError, e: print 'HTTPError' except Exception, e: print 'Exception' else: print print 'We are connected!' flag=True return flag delay=60 #delay in seconds to give nm-applet the possibility to make a connection big_delay=60 #time between Internet connection checking directive_path='...' path_to_kill_modem_manager_script='...' test_site='http://www.microsoft.com/' directive=download_lines(directive_path) if directive=='continue': flag_continue=True else: flag_continue=False while flag_continue: trial=0 flag=check_connection(test_site) while not flag: trial=trial+1 print print 'Trial number: ', trial os.system('sudo '+path_to_kill_modem_manager_script) os.system('killall nm-applet') os.system('modem-manager') os.system('nohup nm-applet &') if not flag: print 'Wait ',delay,'sec before cheking' time.sleep(delay) flag=check_connection(test_site) directive=download_lines(directive_path) if directive=='continue': flag_continue=True else: print 'Exit' flag_continue=False flag=True if flag_continue: print 'It seems that we are online, waiting ',big_delay,'sec before the next checking of the Internet connection' time.sleep(big_delay)
Additionally you have to specify the path to two files in variables
path_to_kill_modem_manager_script. First file (name it as
directive) has to have a word
continueif you want this script to run continuously. The second (name it as
kill_modem_manager_script, respectively) has to have the following content:
It is clear that the last is a bash script to 'kill' modem-manager. You have to give to yourself a permission to run this script as the root without entering a password. For this you have to run in the terminal
and add the following line:
Here you have to substitute your username there and also to add the same path as in the variable
ALL=NOPASSWD:. And of course you have to add execute permission to
P.S. I am sure that there are some much simpler solutions, but the proposed script is working and and working very well. Anyway, you are welcome to comment it.