network-manager loses wired interfaces

[Silviu C.]

For some reason, sometimes network-manager seems to forget I've one of the wired interfaces. The computer would start-up right, it connects to my ISP and sometimes a po-up would show saying that I've been disconnected. If I want to reconnect I can't because the connection does not show up any more. If I do a "sudo service network-manager restart" the conenction will come up again and it will show in the indicator. I've no idea what causes this. a dmesg does not show anything wrong but there is some info in syslog.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: network-manager 0.9.6.0-0ubuntu7
ProcVersionSignature: Ubuntu 3.5.0-25.39-generic 3.5.7.4
Uname: Linux 3.5.0-25-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu10
Architecture: amd64
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
Date: Mon Mar 11 13:02:19 2013
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2012-11-24 (106 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
IpRoute:
 default via 10.0.0.1 dev ppp0 proto static
 10.0.0.1 dev ppp0 proto kernel scope link src 79.112.176.144
 169.254.0.0/16 dev ppp0 scope link metric 1000
MarkForUpload: True
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
RfKill:

SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-con:
 NAME UUID TYPE TIMESTAMP TIMESTAMP-REAL AUTOCONNECT READONLY DBUS-PATH
 Wired connection 1 de4a36b2-740b-40d7-b212-41afbe15743f 802-3-ethernet 1353790395 Sat 24 Nov 2012 10:53:15 PM EET no no /org/freedesktop/NetworkManager/Settings/2
 Wired connection 2 7fbf70cd-fec1-4fd5-a2bc-73225f69fdfa 802-3-ethernet 1353790395 Sat 24 Nov 2012 10:53:15 PM EET no no /org/freedesktop/NetworkManager/Settings/1
 RDS PPPoE 740a6bbd-a27d-44bf-8d81-7761b3c8756e pppoe 1362999634 Mon 11 Mar 2013 01:00:34 PM EET yes no /org/freedesktop/NetworkManager/Settings/0
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH
 eth0 802-3-ethernet unavailable /org/freedesktop/NetworkManager/Devices/1
 eth1 802-3-ethernet connected /org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
 RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
 running 0.9.6.0 connected enabled enabled enabled enabled disabled

[Silviu C. (silviucc)]

This seems to be relevant to the bug:

Mar 11 11:06:14 silviu-quantal pppd[1817]: No response to 5 echo-requests
Mar 11 11:06:14 silviu-quantal pppd[1817]: Serial link appears to be disconnected.
Mar 11 11:06:14 silviu-quantal pppd[1817]: Connect time 70.6 minutes.
Mar 11 11:06:14 silviu-quantal pppd[1817]: Sent 3546526677 bytes, received 1172063659 bytes.
Mar 11 11:06:20 silviu-quantal pppd[1817]: Connection terminated.
Mar 11 11:06:20 silviu-quantal NetworkManager[1169]: <info> (eth1): device state change: activated -> failed (reason 'ppp-disconnect') [100 120 13]
Mar 11 11:06:20 silviu-quantal NetworkManager[1169]: <warn> Activation (eth1) failed for connection 'RDS PPPoE'
Mar 11 11:06:20 silviu-quantal NetworkManager[1169]: SCPlugin-Ifupdown: devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Mar 11 11:06:20 silviu-quantal NetworkManager[1169]: <info> (eth1): now unmanaged
Mar 11 11:06:20 silviu-quantal NetworkManager[1169]: <info> (eth1): device state change: failed -> unmanaged (reason 'removed') [120 10 36]
Mar 11 11:06:20 silviu-quantal NetworkManager[1169]: <info> (eth1): deactivating device (reason 'removed') [36]
Mar 11 11:06:20 silviu-quantal dbus[1117]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper)
Mar 11 11:06:20 silviu-quantal NetworkManager[1169]: <warn> could not read ppp stats: No such device
Mar 11 11:06:20 silviu-quantal dbus[1117]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Mar 11 11:06:20 silviu-quantal NetworkManager[1169]: <warn> DNS: plugin dnsmasq update failed
Mar 11 11:06:20 silviu-quantal NetworkManager[1169]: <info> ((null)): removing resolv.conf from /sbin/resolvconf
Mar 11 11:06:20 silviu-quantal dnsmasq[2043]: setting upstream servers from DBus
Mar 11 11:06:20 silviu-quantal pppd[1817]: Terminating on signal 15
Mar 11 11:06:20 silviu-quantal pppd[1817]: Modem hangup
Mar 11 11:06:20 silviu-quantal pppd[1817]: Exit.
Mar 11 11:06:20 silviu-quantal NetworkManager[1169]: <info> (eth1): cleaning up...
Mar 11 11:06:20 silviu-quantal NetworkManager[1169]: <info> (eth1): taking down device.
Mar 11 11:06:21 silviu-quantal NetworkManager[1169]: <info> Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889)
Mar 11 11:06:21 silviu-quantal NetworkManager[1169]: <info> Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889)

[Matthew Paul Thomas (mpt)]

This is similar to bug 1152927.