랩톱이나 데스크톱 컴퓨터에서 Wi-Fi에 연결하는 데 자주 문제가 발생합니다. 두 머신 모두 Ubuntu 14.04에서 실행됩니다.
때로는 Wi-Fi에 연결할 수 없는 경우가 있는데 유일한 해결 방법은 라우터를 다시 시작하는 것입니다. 네트워크 관리자를 재부팅하거나 다시 시작해도 도움이 되지 않았습니다. 나는 또한 하라고 제안하는 해결책을 발견했는데 sudo pkill -f wpa_supplicant, 그 중 이미 문제가 해결되었을 것이라고 생각했지만 아니, 그런 일이 다시 일어났습니다.
문제는 새로 부팅한 후나 정지에서 깨어난 후에 항상 발생합니다. 라우터를 다시 시작하면 일반적으로 문제가 해결되며(때로는 나중에 컴퓨터를 재부팅해야 할 수도 있음) 연결이 안정적으로 유지됩니다. 이 문제는 Windows, Mac OS 또는 Android를 사용하는 다른 장치에서는 발생하지 않습니다.
다음은 한 번의 연결 시도에 대한 로그입니다 /var/log/syslog.
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Auto-activating connection 'Bastians WLAN'.
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Activation (wlan0) starting connection 'Bastians WLAN'
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> (wlan0): device state change: disconnected -> prepare (reason 'none') [30 40 0]
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> NetworkManager state is now CONNECTING
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> (wlan0): device state change: prepare -> config (reason 'none') [40 50 0]
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Activation (wlan0/wireless): access point 'Bastians WLAN' has security, but secrets are required.
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> (wlan0): device state change: config -> need-auth (reason 'none') [50 60 0]
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> (wlan0): device state change: need-auth -> prepare (reason 'none') [60 40 0]
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> (wlan0): device state change: prepare -> config (reason 'none') [40 50 0]
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Activation (wlan0/wireless): connection 'Bastians WLAN' has security, and secrets exist. No new secrets needed.
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Config: added 'ssid' value 'Bastians WLAN'
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Config: added 'scan_ssid' value '1'
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Config: added 'key_mgmt' value 'WPA-PSK'
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Config: added 'auth_alg' value 'OPEN'
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Config: added 'psk' value '<omitted>'
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> Config: set interface ap_scan to 1
Apr 16 21:30:42 Karl2 NetworkManager[811]: <info> (wlan0): supplicant interface state: disconnected -> scanning
Apr 16 21:31:07 Karl2 NetworkManager[811]: <warn> Activation (wlan0/wireless): association took too long, failing activation.
Apr 16 21:31:07 Karl2 NetworkManager[811]: <info> (wlan0): device state change: config -> failed (reason 'SSID not found') [50 120 53]
Apr 16 21:31:07 Karl2 NetworkManager[811]: <info> NetworkManager state is now DISCONNECTED
Apr 16 21:31:07 Karl2 NetworkManager[811]: <info> Marking connection 'Bastians WLAN' invalid.
Apr 16 21:31:07 Karl2 NetworkManager[811]: <warn> Activation (wlan0) failed for connection 'Bastians WLAN'
Apr 16 21:31:07 Karl2 NetworkManager[811]: <info> (wlan0): device state change: failed -> disconnected (reason 'none') [120 30 0]
Apr 16 21:31:07 Karl2 NetworkManager[811]: <info> (wlan0): deactivating device (reason 'none') [0]
Apr 16 21:31:07 Karl2 NetworkManager[811]: <info> (wlan0): supplicant interface state: scanning -> disconnected
Apr 16 21:31:07 Karl2 NetworkManager[811]: <warn> Couldn't disconnect supplicant interface: This interface is not connected.
답변1
이전에도 비슷한 문제가 있었습니다. wicd 네트워크 관리자를 설치하는 것이 좋습니다. 설치 지침을 찾을 수 있습니다.여기