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There was a problem with my internet connection and I thought that restarting the networking service might fix the problem. So I used sudo service networking restart command. However, my window manager crashed and I had to restart laptop to get it back. The problem is, ever since after that I haven't been able to connect to my WiFi. Anybody knows a solution to this?

Edit: I can see the wireless networks. When I connect to mine, Ubuntu keeps asking me for password even though I enter the right password.

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Please give us more info. Do you see wireless networks but you can't connect to them? Does it keep on asking you for a password? Or does your laptop not show you any wireless networks and doesn't recognize your wireless card? – Alaa Ali Jun 20 '13 at 6:27
@Alaa - Please see edit. – TheRookierLearner Jun 20 '13 at 15:05
Go to the wireless icon at the top right > Edit connections... > Delete your Wireless network, then try to connect again. If it doesn't work, take a look at this answer. – Alaa Ali Jun 20 '13 at 15:19
Replying from Ubuntu! :) Thnx. You can just answer it instead of commenting so that I can accept an answer. – TheRookierLearner Jun 20 '13 at 15:38
Which one worked for you =D? My suggestion or the answer in the other question? – Alaa Ali Jun 20 '13 at 16:27
up vote 1 down vote accepted

If the wireless keeps on asking you for the password, do this:

  1. Click on the wireless icon on the top right.
  2. Go to Edit Connections...
  3. Highlight and delete the wireless network you are trying to connect to.
  4. Try to connect again.
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