This problem happens sometimes when ubuntu starts up. You can’t really boot to the interface sometimes.
Splash Screen with the 5 dots and a message saying:
waiting for network configuration
followed by:
waiting an additional 60 seconds for network configuration
Solution to this problem is following :
In /etc/network/interfaces this changes all interfaces (except lo) from auto to allow-hotplug. This way the boot is no more waiting for the interfaces to come up first.Example before (look at auto eth0):
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet dhcp
auto wlan0
iface wlan0 inet dhcp
Example after (look at allow-hotplug eth0):
auto lo
iface lo inet loopback
# The primary network interface
allow-hotplug eth0
iface eth0 inet dhcp
auto wlan0
allow-hotplug wlan0
iface wlan0 inet dhcp