If your network manager is not working, and says unmanaged, or Networking disabled in ubuntu 10.04 try this fix
Open the terminal from Applications menu -> Accessories -> Terminal run the following commands
service network-manager stop
rm /var/lib/NetworkManager/NetworkManager.state
service network-manager start
Then reboot your system.
My first 15 minutes of experience with any linux was a networkmanager crash. it took me several hours of trying to cope with it myself (I thought that I’m doing something wrong), yet it seems that after n-teen years of development Linux still fails at simple tasks.
Thankfully it’s not my computer I set up linux on.
Anyways, back to the topic: neither the commands worked, nor the manual operation (the file cannot be edited or deleted, despite I made my account member of all possible groups). What’s up with that? I should have typed some more magic, maybe?
Eventually I’ve solved an issue by killing the process (Knetworkmanager, like if that K was necessary?) and suspending to disk. Hopefully one of the fixes that are currently being downloaded solves the issue. I just hope for it.
it worked. thank you.
@mctom: the “more magic” is “sudo” before each command –
sudo service network-manager stop
… etc.
“sudo” runs the command as the root user, which is not the same (has more powers) even than making your user a member of all admin groups.
Maybe the OP is running always as root (!!!! gasp!) and didn’t think of sudo because of that.
Thanks a lot for the information.
It works.
Thanks a lot man it worked 😀
any more ideas ? , its not working at all , with root also,
thanks in advance ,
Thanks for the fix! It worked for me.
https://bugs.launchpad.net/bugs/524454
Fixed in Maverick and newer.
1.) Check in file /etc/NetworkManager/nm-system-settings.conf and after [ifupdown] there should be managed=true (if false then change to true, otherwise network interfaces such as eth0 or wlan0 will have to be managed manually or by some other script)
2.) [at prompt type] sudo chmod 600 /etc/NetworkManager/system-connections/* (the files in this directory must be read-only by root only or NM will ignore them and there will be a log entry in /var/log/syslog if NM rejects due to “insecure configuration”
3.)[at prompt type] rm /var/lib/NetworkManager/NetworkManager.state (“rm” means “remove”, is like “del” in DOS, if that helps)
4.) [at prompt type]service network-manager restart
Viola! rebooting should not be required – It ain’t Windows.
Thank u tons of time!!!!
Thank you for your post. It worked instantly.
Great work. This one saved a million hours and headache too 😀
Thanks again.
Thank you so much! This is just what I needed!
Thanks! Worked 100% on PowerPC
thanks, it worked 🙂
Alternatively:
sudo stop network-manager
sudo rm -f /var/lib/NetworkManager/NetworkManager.state
sudo start network-manager
the suggestion of Colin is great !
This is great thank you! And yes, used sudo before each command.
The irony is that to look this up & make ubuntu work I used my laptop that runs on windows
I tried entering the commands it said commands not recognized…
Would this work from root in ubuntu 12.10, please?
now its working for me.
thanks alot.
I just thought I would let you know this helpful post is still being found and used. Thanks a lot. I used the Ubuntu server install to create a RAID0 system, then installed ubuntu-desktop to get a GUI. This post helped me fix one of the few bugs I had.
It worked but after reboot again same issue, wireless network is not detecting. above commands seems not persistent across reboot. anybody have faced same issue?
for me ubuntu was booting up w/o completing network configuration. So restarting network manager was resolving issue and same problem again after a reboot. if u are facing same problem below link can be helpful to resolve issue.
http://askubuntu.com/questions/213614/waiting-for-network-configuration-problem