Ubuntu – Wifi can’t connect before wired. How to diagnose what could be going wrong (which logs, etc)

11.10diagnosticnetworkingwireless

I think this is a problem related to another I've had, but here's the first situation:

  • When I boot up and connect to wireless, I am told I connect to my wireless network.
  • However, I am unable to actually connect to the internet. (Pages time out and say not connected.)

In the second situation
– When I boot up and connect via eth, my connection is fine
– I can then simultaneously connect to wireless.
– After removing the ethernet connection, I have wireless that works fine and keeps my connection.

Not sure what the root mechanism that's causing this problem is, but I suspect it's related to xorg and libglib2 problems I experienced and am resolving elsewhere. However, to confirm my hunches, what log file should I be looking at to even identify why this is happening? I'm gunning with this question for a list of places that I should look to diagnose this crazy problem, given that there is a behavior that works differently depending on order of connection.

(One other note, I know this has worked in the recent past, so it's not an issue of the wireless card itself.)

UPDATE Mobile broadband has the same problem. Does not work unless I first connect to wired connection and simultaneously connect to broadband before removing wired connection. Help, please!

UPDATE 2 Forget diagnosis, can someone fix this please? I've been in windows for a week because I can't use wifi!

Best Answer

/var/log/syslog should give you some information about what's going on with your connections, you may also find some information in /var/log/kernel.

Related Question