Network Manager Disabled

[chaosgrimm]

If the network manager isn't crashing check these, should be set as:

/etc/NetworkManager/nm-system-settings.conf

[main]
plugins=ifupdown,keyfile

[ifupdown]
managed=true

-------
and

/var/lib/NetworkManager/NetworkManager.state

[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true

[ivan.tg]

Hi chaosgrimm,

Thank you for the solution! I had exactly this problem. I have no idea what made this variables turn 'false' all the sudden. I've been using Kubuntu 10.04 for some days now and networking was just fine so i was not messing around with these settings.
Although i did change some power saving setting before the 'disabled' networking problem appeared i doubt it has anything to do with it. Looking at other people's posts it seems to appear randomly.

Cheers
ivan

[spikyjt]

Thanks for this. It happened on my boss's laptop so most embarrassing! No idea why, but NetworkingEnabled was set to false.

[agniruc]

If the network manager isn't crashing check these, should be set as:

/etc/NetworkManager/nm-system-settings.conf

[main]
plugins=ifupdown,keyfile

[ifupdown]
managed=true

-------
and

/var/lib/NetworkManager/NetworkManager.state

[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true

Thanks for posting this, chaosgrimm! Saved my day!

All happened when I tried to put my laptop on 'sleep mode'. For some reason it did not sleep and stopped working (no response at all, even the SysReq + R, E, I, S, U, B trick wasn't working).

After I reset it, the networkmanager seemed dead. 'dhclient' was working, though. Then I found this post and discovered that all the options in those configuration files were set to 'false'!

[epavlica]

Thanks for the fix, chaosgrimm!

This has happened to me on two separate systems now; it may be a bug in 10.04 LTS. Both times it occurred the system failed to go into the sleep state, froze, and upon restart had these networking flags changed to "false".

Has anyone submitted a bug report for this yet?

[ewka]

Exactly the same problem on a Dell. Not sure how to submit a bug report, but it should be done. Hopefully someone more experienced will do it.

Thanks for the help chaosgrimm!

[paulbarratt]

Hi, I think Agniruc and Epavlica are on the right track: it's something connected with the power management failing to go into or resume from standby, and the network manager being left in a disabled state.

I recently upgraded to Kubuntu 10.04 from 9.10 (with previous 9.04 etc previously on the same system - probably not a good idea!) - so not a clean system.

My laptop is a Sony Vaio VGN-FW11E and the standby/resume has never worked properly - it just hangs on resume and needs a power-off to get it running again. Last night, since I had not tried the standby/resume with 10.04, I tried it to see if it was working and got the same hang as usual. The following morning I got the same situation the the previous posters and the fix also worked for me.

Thanks for your help.

[elivs]

The same thing happened for me on an HP 6930p laptop with kubuntu 10.04.

The settings got switched to "false" during a sleep / hibernation mode.

I can't find this in the bug tracking system, but I'm not familiar with submitting bugs to ubuntu. Has anyone submitted it yet?

elivs

[Bucky Ball]

Are these instructions for 10.04? Using 8.04 and don't have any of these files to check or change.

Should I create them and add the changes?

[homayonifar]

The same problem on Kubuntu 10 and Dell latitude D360. After it went on RAM going out of battery the next restart made all keys equal to false ! After editing them and setiing to true, the network runs normal as before. Thanks for the solution.

Regards
M. H.