我经常遇到 wifi 随机断开的问题，除非我重启机器，否则无法重新连接。有时，重启也无济于事，它又会随机开始工作。
我已经尝试过通常
sudo sh -c 'modprobe -r iwlwifi && modprobe iwlwifi 11n_disable=1'
但这并没有什么帮助。
以下是我的机器尝试连接 WiFi 失败时系统日志中的信息：
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Activation (wlan0) starting connection 'House Targaryen'
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> (wlan0): device state change: disconnected -> prepare (reason 'none') [30 40 0]
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> NetworkManager state is now CONNECTING
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> (wlan0): device state change: prepare -> config (reason 'none') [40 50 0]
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Activation (wlan0/wireless): access point 'House Targaryen' has security, but secrets are required.
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> (wlan0): device state change: config -> need-auth (reason 'none') [50 60 0]
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> (wlan0): device state change: need-auth -> prepare (reason 'none') [60 40 0]
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> (wlan0): device state change: prepare -> config (reason 'none') [40 50 0]
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Activation (wlan0/wireless): connection 'House Targaryen' has security, and secrets exist. No new secrets needed.
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Config: added 'ssid' value 'House Targaryen'
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Config: added 'scan_ssid' value '1'
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Config: added 'key_mgmt' value 'WPA-PSK'
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Config: added 'psk' value '<omitted>'
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> Config: set interface ap_scan to 1
May 28 22:42:22 agniva-studio NetworkManager[1046]: <info> (wlan0): supplicant interface state: disconnected -> scanning
May 28 22:42:48 agniva-studio NetworkManager[1046]: <warn> Activation (wlan0/wireless): association took too long, failing activation.
May 28 22:42:48 agniva-studio NetworkManager[1046]: <info> (wlan0): device state change: config -> failed (reason 'SSID not found') [50 120 53]
May 28 22:42:48 agniva-studio NetworkManager[1046]: <info> NetworkManager state is now DISCONNECTED
May 28 22:42:48 agniva-studio NetworkManager[1046]: <info> Marking connection 'House Targaryen' invalid.
May 28 22:42:48 agniva-studio NetworkManager[1046]: <warn> Activation (wlan0) failed for connection 'House Targaryen'
May 28 22:42:48 agniva-studio NetworkManager[1046]: <info> (wlan0): device state change: failed -> disconnected (reason 'none') [120 30 0]
May 28 22:42:48 agniva-studio NetworkManager[1046]: <info> (wlan0): deactivating device (reason 'none') [0]
May 28 22:42:48 agniva-studio NetworkManager[1046]: <info> (wlan0): supplicant interface state: scanning -> disconnected
May 28 22:42:48 agniva-studio NetworkManager[1046]: <warn> Couldn't disconnect supplicant interface: This interface is not connected.
任何帮助都将不胜感激。