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I installed Ubuntu 13.04 on Asus M50V laptop. It connected to my wireless network, but there is no internet. I can see that laptop got its IP number and is connected.

ping command is not working even if I write IP directly. Even router's IP.

All my other devices have internet on that wireless network.

What can I do to find where is the problem?

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Did you check your DNS settings? Try setting them to 8.8.8.8 and 8.8.4.4 – StackExchange User May 8 '13 at 21:48
    
i tried that now, but i see now that ping is not working even if type IP there – andy57 May 8 '13 at 21:57
1  
Is the IP address of the laptop in the same IP range as your network? You might be getting a connection but no IP address assigned by the router and falling back to a self-assigned IP address (usually starts with 164.x.x.x) – douggro May 8 '13 at 22:04
    
yes the IP is assigned, its 192.168.0.101 (i see it in ifconfig under wlan0), my desktop computer has 192.168.0.100 and there are 2 other mobile devices that work too. – andy57 May 8 '13 at 22:09
    
Is your default gateway and netmask alright? Does ping give any error messages? Is there any non-zero invalid field in iwconfig? – grimpitch May 8 '13 at 22:47

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