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Your /etc/network/interfaces has no entry for your eth0 connection so it can't really start something there. If you add the following lines it will be started during boot. auto eth0 iface eth0 inet dhcp If you want to have a static IP for your client you can also type in a static IP. auto eth0 iface eth0 inet static address 192.168.x.x netmask ...


My TP-Link TL-WN821n often disconnected from the WiFi network and didn't reconnect until I forced it. The following link fixed that issue


Just disconnect, wait for a minute, and then just reconnect. I know it's annoying, but it works for me. Other than that, you may need patience and wait for Ubuntu to find a stability patch for that. This type of situation happens more often to me after i use Win8.1, and then switch to Ubuntu.


I found the answer for my problem here I have applied the solution proposed by the user varunendra presented in the page 1 : Code: sudo rm /etc/modprobe.d/ath9k.conf echo "options ath9k nohwcrypt=1" | sudo tee /etc/modprobe.d/ath9k.conf echo "...

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