knetworkmanager disabled itself

[sonshadowcat]

After I upgraded to ubuntu 10.04 my internet connection was working fine( both wired and wireless) and now all of a sudden knetworkmanager has disabled itself so I cannot get online at all. When I leave the mouse to hover over the icon it says unmanaged.

Does anyone know what could have caused this and if theres a fix?

[jkclarkson]

sudo dolphin
navigate to /var/lib/NetworkManager
open NetworkManager.state with kate
edit NetworkingEnabled=false to true
save
reboot

[LK_gandalf_]

I had exactly the same problem on a laptop of a friend, unfortunately she is not able to remember if happened something particular before the problem (maybe some system updates).
These workout worked perfectly for me, thank you.

[anupkshah]

@jkclarkson: thank you -- that was exactly the problem I had.

@sonshadowcat: For me, network manager was all of a sudden disabled when trying to come out of sleep on my laptop. Since upgrading to 10.04, Kubuntu has been even better. The sleep (until this moment) had been flawless -- on my laptop I could repeatedly sleep without problems in 10.04 -- and for hours too.

By contrast, in earlier versions, sleep was hit and miss -- would work one time without reboot and only if sleeping for a couple of hours or less.

But this time, for some reason, trying to come out of sleep (for maybe half an hour) it never came back (the screen remained blank, no keyboard/mouse etc). I had to force a reboot. Since then the network manager was disabled. I am guessing there is a link there... Anyway, hope that gives some clues for others.

[albert-I]

I had exactly the same problem on a laptop of a friend, unfortunately she is not able to remember if happened something particular before the problem (maybe some system updates).
These workout worked perfectly for me, thank you.

I had the same, now i made the work and reboot

tank you

[skierpage]

This seems to happen if you ever have a problem on standby or shutdown.

The underlying NetworkManager bug is Bug #524454 in network-manager (Ubuntu): “Networking is disabled on boot”

KDE's inability to restart networking is Bug #553994 in network-manager (Ubuntu): “knetworkmanager doesn't connect with networkmanager” , the Debian bug is 576279 "network-manager-kde: Tray icon non-functional, shows "Network Management disabled" message"

If you don't want to reboot, after editing NetworkManager.state you can try entering in a terminal sudo restart network-manager ; you may also need to manually restart networking with commands like sudo dhclient and sudo ifconfig eth0 up . If those don't work, reboot.

[axelmasok]

This inconvenience just cost me an hour of work time. Thanks for the solution but I must say THAT BUG REALLY P^&%$D ME OFF! Kubuntu 10.04. Services automatically disabling themselves .... what's next?

[perezomail]

sudo dolphin
navigate to /var/lib/NetworkManager
open NetworkManager.state with kate
edit NetworkingEnabled=false to true
save
reboot

well i did not have this problem on my desktop however i did have it on my net-book these instructions worked for getting my net-book to receive a landlines signal however i cannot see any wifi signal and manually entering the wifi signal did not work either any ideas? this seems to be a common problem since i have found this in more than one area in Kubuntu forum

after a few failed attempts with the above instructions i tried one last time but before i rebooted i wiggled that wifi cutoff switch some funny thing is i never go near that thing so i sooner forget about it. this may help others on netbooks

[Alasta]

Perzomails fix worked for me . I think that the latest kde looks better than win 7 or snow leopard . pity its got a win 7 bug....

[Alasta]

Just looking at the age of this thread too...

Really