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Just recently installed ubuntu on my vaio VPCS11X9E. The wifi works fine on windows, and wired works fine on both. The wireless also works perfectly with my school's wifi, but when connecting to my home wifi, I have no internet access. Cannot ping and iwconfig states "no wireless extensions".


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closed as unclear what you're asking by David Foerster, Eric Carvalho, Pilot6, Jacob Vlijm, Paranoid Panda Nov 1 at 20:32

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question.If this question can be reworded to fit the rules in the help center, please edit the question.

Could be you're not using the correct security settings for your wifi at home? e.g. you need to use WPA2-PSK and you're trying to use WPA – Radu Rădeanu Apr 18 '13 at 15:12
If you load a live cd does the wifi behave differently? – Radu Rădeanu Apr 18 '13 at 15:15
Please run the WiFi diagnostics and edit your question to include a link to the result. – David Foerster Oct 30 at 18:48

2 Answers 2

Besides not having the proper password entered for your home network, the other slightly-more-remote answers could be that:

  1. your home wifi is using an unsupported WEP authentication method. WPA and WPA2 are the commonly supported protocols;
  2. your wifi connection on the laptop is using a fixed IP address that is not in the same IP range as your home network. Are you using DHCP on the wifi connection?
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I had this problem when my home network could not use the ISPs DNS server. I solved this by using Google DNS.
See here:

To see if this is your problem you could try to ping a site by IP, such as Googles DNS servers! Try in the terminal:




If you get a reply try to ping site by name such as:


If that dosen't work, than DNS is your problem.

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