我有 XUbuntu 16.04，但我的 HP dv6t 四核版笔记本电脑无法连接到某些 wifi 接入点。
$ uname -a
Linux maya 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 x86_64 x86_64 x86_64 GNU/Linu
希望这是要查看的正确的日志文件：
$ tail -f /var/log/kern.log
Oct 7 09:06:31 maya NetworkManager[1604]: <info> [1475856391.9237] device (wlo1): Activation: starting connection 'Pismo Lighthouse Suites' (a54852a2-0ef8-4f14-bb91-e98eda7bce14)
Oct 7 09:06:31 maya NetworkManager[1604]: <info> [1475856391.9240] audit: op="connection-activate" uuid="a54852a2-0ef8-4f14-bb91-e98eda7bce14" name="Pismo Lighthouse Suites" pid=3235 uid=1000 result="success"
Oct 7 09:06:31 maya NetworkManager[1604]: <info> [1475856391.9242] device (wlo1): state change: disconnected -> prepare (reason 'none') [30 40 0]
Oct 7 09:06:31 maya NetworkManager[1604]: <info> [1475856391.9245] manager: NetworkManager state is now CONNECTING
Oct 7 09:06:31 maya NetworkManager[1604]: <info> [1475856391.9262] device (wlo1): state change: prepare -> config (reason 'none') [40 50 0]
Oct 7 09:06:31 maya NetworkManager[1604]: <info> [1475856391.9271] device (wlo1): Activation: (wifi) access point 'Pismo Lighthouse Suites' has security, but secrets are required.
Oct 7 09:06:31 maya NetworkManager[1604]: <info> [1475856391.9275] device (wlo1): state change: config -> need-auth (reason 'none') [50 60 0]
Oct 7 09:06:56 maya NetworkManager[1604]: <warn> [1475856416.9562] device (wlo1): No agents were available for this request.
Oct 7 09:06:56 maya NetworkManager[1604]: <info> [1475856416.9563] device (wlo1): state change: need-auth -> failed (reason 'no-secrets') [60 120 7]
Oct 7 09:06:56 maya NetworkManager[1604]: <info> [1475856416.9567] manager: NetworkManager state is now DISCONNECTED
Oct 7 09:06:56 maya NetworkManager[1604]: <warn> [1475856416.9572] device (wlo1): Activation: failed for connection 'Pismo Lighthouse Suites'
Oct 7 09:06:56 maya NetworkManager[1604]: <info> [1475856416.9579] device (wlo1): state change: failed -> disconnected (reason 'none') [120 30 0]
Oct 7 09:06:56 maya kernel: [ 106.646942] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready