can't connect to internet with modem gsm after updating resolvconf and isc-dhcp-client

[alif f.s]

i have successfully dialed a modem from network manager. But unfortunately couldn't reach the internet. this was happened after updating resolvconf yesterday. Now i'm reporting this bug from third party app for dialing modem IXCONN.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: resolvconf 1.63ubuntu16
ProcVersionSignature: Ubuntu 3.2.0-30.48-generic-pae 3.2.27
Uname: Linux 3.2.0-30-generic-pae i686
NonfreeKernelModules: wl
ApportVersion: 2.0.1-0ubuntu13
Architecture: i386
Date: Fri Sep 21 23:02:33 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
PackageArchitecture: all
SourcePackage: resolvconf
UpgradeStatus: No upgrade log present (probably fresh install)

[Thomas Hood (jdthood)]

Please post the output of the following commands.

    ls -l /etc/resolv.conf
    cat /etc/resolv.conf
    ls -l /run/resolvconf
    ls -l /run/resolvconf/interface
    for F in /run/resolvconf/interface/* ; do echo === $F === ; cat $F ; done
    ls -l /etc/resolvconf/resolv.conf.d
    for F in /etc/resolvconf/resolv.conf.d/* ; do echo === $F === ; cat $F ; done
    cat /etc/NetworkManager/NetworkManager.conf
    ps -elfww|grep dnsmasq

[alif f.s (alfaezar)]

should i use sudo?. here is the output.

pc@alif-PC:~$ ls -l /etc/resolv.conf
lrwxrwxrwx 1 root root 29 Jun 22 15:35 /etc/resolv.conf -> ../run/resolvconf/resolv.conf
pc@alif-PC:~$ cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.0.1
pc@alif-PC:~$ ls -l /run/resolvconf
total 4
-rw-r--r-- 1 root root 0 Sep 22 12:13 enable-updates
drwxr-xr-x 2 root root 60 Sep 22 22:40 interface
-rw-r--r-- 1 root root 172 Sep 22 22:40 resolv.conf
pc@alif-PC:~$ ls -l /run/resolvconf/interface
total 4
-rw-r--r-- 1 root root 21 Sep 22 22:40 NetworkManager
pc@alif-PC:~$ for F in /run/resolvconf/interface/* ; do echo === $F === ; cat $F ; done
=== /run/resolvconf/interface/NetworkManager ===
nameserver 127.0.0.1
pc@alif-PC:~$ ls -l /etc/resolvconf/resolv.conf.d
total 4
-rw-r--r-- 1 root root 0 Mar 30 03:37 base
-rw-r--r-- 1 root root 151 Mar 30 03:37 head
pc@alif-PC:~$ for F in /etc/resolvconf/resolv.conf.d/* ; do echo === $F === ; cat $F ; done
=== /etc/resolvconf/resolv.conf.d/base ===
=== /etc/resolvconf/resolv.conf.d/head ===
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
pc@alif-PC:~$ cat /etc/NetworkManager/NetworkManager.conf
[main]
plugins=ifupdown,keyfile
dns=dnsmasq

[ifupdown]
managed=false
pc@alif-PC:~$ ps -elfww|grep dnsmasq
4 S nobody 8629 826 0 80 0 - 1346 poll_s 22:40 ? 00:00:00 /usr/sbin/dnsmasq --no-resolv --keep-in-foreground --no-hosts --bind-interfaces --pid-file=/var/run/sendsigs.omit.d/network-manager.dnsmasq.pid --listen-address=127.0.0.1 --conf-file=/var/run/nm-dns-dnsmasq.conf --cache-size=0 --proxy-dnssec
0 S pc 8890 8735 0 80 0 - 1092 pipe_w 22:45 pts/0 00:00:00 grep --color=auto dnsmasq
pc@alif-PC:~$

[Thomas Hood (jdthood)]

@alfaezar: Thanks for the information. Everything looks OK so far as resolvconf is concerned. Please post the output of

    cat /var/run/nm-dns-dnsmasq.conf
    dpkg -l network-manager dnsmasq isc-dhcp-client

[Thomas Hood (jdthood)]

Not a resolvconf issue. Perhaps an isc-dhcp-client issue?

[alif f.s (alfaezar)]

pc@alif-PC:~$ cat /var/run/nm-dns-dnsmasq.conf
pc@alif-PC:~$ dpkg -l network-manager dnsmasq isc-dhcp-client
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Description
+++-==============-==============-============================================
un dnsmasq <none> (no description available)
ii isc-dhcp-clien 4.1.ESV-R4-0ub ISC DHCP client
ii network-manage 0.9.4.0-0ubunt network management framework (daemon and use
pc@alif-PC:~$

[Stéphane Graber (stgraber)]

Please attach /var/log/syslog right after trying a connection, also please let us know what software you're using to configure that modem.

NetworkManager typically never uses isc-dhcp-client for gsm modems, so I'd expect any other software to do the same, making this an issue with whatever that software is.

[Launchpad Janitor (janitor)]

[Expired for isc-dhcp (Ubuntu) because there has been no activity for 60 days.]