임시 해결책

임시 해결책

14.04를 새로 설치했는데 작동하는 Wi-Fi 네트워크에 연결할 수 없습니다(아래 로그에서 "Bricks and Scones"는 액세스 포인트 이름입니다). 다른 장치(예: 이 글을 게시하는 데 사용하는 안드로이드)는 잘 연결됩니다. 내 구성에 어떤 문제가 있는지 잘 모르겠습니다. syslog를 보고 있지만 여전히 무엇이 잘못되었는지 정리할 수 없습니다. 이 경고는 무엇을 의미합니까?

ryan@palms /v/log> tail -f syslog | grep -C5 'warn\|error'
May 11 18:55:18 palms avahi-daemon[730]: Withdrawing address record for 192.168.1.129 on wlan0.
May 11 18:55:18 palms avahi-daemon[730]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.1.129.
May 11 18:55:18 palms avahi-daemon[730]: Interface wlan0.IPv4 no longer relevant for mDNS.
May 11 18:55:09 palms whoopsie[1292]: online
May 11 18:55:18 palms whoopsie[1292]: offline
May 11 18:55:18 palms NetworkManager[985]: <warn> DNS: plugin dnsmasq update failed
May 11 18:55:18 palms wpa_supplicant[1004]: nl80211: Was expecting local disconnect but got another disconnect event first
May 11 18:55:18 palms dnsmasq[2269]: setting upstream servers from DBus
May 11 18:55:18 palms NetworkManager[985]: <info> Removing DNS information from /sbin/resolvconf
May 11 18:55:18 palms kernel: [  806.867681] cfg80211: Calling CRDA to update world regulatory domain
May 11 18:55:18 palms kernel: [  806.873484] cfg80211: World regulatory domain updated:
--
May 11 18:55:18 palms NetworkManager[985]: <info> Activation (wlan0) starting connection 'Bricks and Scones Guest Network'
May 11 18:55:18 palms NetworkManager[985]: <info> (wlan0): device state change: disconnected -> prepare (reason 'none') [30 40 0]
May 11 18:55:18 palms NetworkManager[985]: <info> NetworkManager state is now CONNECTING
May 11 18:55:18 palms NetworkManager[985]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
May 11 18:55:18 palms wpa_supplicant[1004]: wlan0: CTRL-EVENT-SCAN-STARTED 
May 11 18:55:18 palms NetworkManager[985]: <warn> Connection disconnected (reason -3)
May 11 18:55:18 palms NetworkManager[985]: <info> (wlan0): supplicant interface state: completed -> disconnected
May 11 18:55:18 palms NetworkManager[985]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
May 11 18:55:18 palms NetworkManager[985]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
May 11 18:55:18 palms NetworkManager[985]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
May 11 18:55:18 palms NetworkManager[985]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
--
May 11 18:55:39 palms NetworkManager[985]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) started...
May 11 18:55:39 palms NetworkManager[985]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) complete.
May 11 18:55:40 palms dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 10 (xid=0x7609df84)
May 11 18:55:50 palms dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 13 (xid=0x7609df84)
May 11 18:56:03 palms dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 9 (xid=0x7609df84)
May 11 18:56:04 palms NetworkManager[985]: <warn> (wlan0): DHCPv4 request timed out.
May 11 18:56:04 palms NetworkManager[985]: <info> (wlan0): canceled DHCP transaction, DHCP client pid 4231
May 11 18:56:04 palms NetworkManager[985]: <info> Activation (wlan0) Stage 4 of 5 (IPv4 Configure Timeout) scheduled...
May 11 18:56:04 palms NetworkManager[985]: <info> Activation (wlan0) Stage 4 of 5 (IPv4 Configure Timeout) started...
May 11 18:56:04 palms NetworkManager[985]: <info> (wlan0): device state change: ip-config -> failed (reason 'ip-config-unavailable') [70 120 5]
May 11 18:56:04 palms NetworkManager[985]: <info> NetworkManager state is now DISCONNECTED
May 11 18:56:04 palms NetworkManager[985]: <info> Marking connection 'Bricks and Scones Guest Network' invalid.
May 11 18:56:04 palms NetworkManager[985]: <warn> Activation (wlan0) failed for connection 'Bricks and Scones Guest Network'
May 11 18:56:04 palms NetworkManager[985]: <info> Activation (wlan0) Stage 4 of 5 (IPv4 Configure Timeout) complete.
May 11 18:56:04 palms NetworkManager[985]: <info> (wlan0): device state change: failed -> disconnected (reason 'none') [120 30 0]
May 11 18:56:04 palms NetworkManager[985]: <info> (wlan0): deactivating device (reason 'none') [0]
May 11 18:56:04 palms avahi-daemon[730]: Withdrawing address record for fe80::3623:87ff:fefd:5b57 on wlan0.
May 11 18:56:04 palms avahi-daemon[730]: Leaving mDNS multicast group on interface wlan0.IPv6 with address fe80::3623:87ff:fefd:5b57.
May 11 18:56:04 palms avahi-daemon[730]: Interface wlan0.IPv6 no longer relevant for mDNS.
May 11 18:56:04 palms wpa_supplicant[1004]: wlan0: CTRL-EVENT-DISCONNECTED bssid=7e:d1:c3:ce:2c:9a reason=3 locally_generated=1
May 11 18:56:04 palms NetworkManager[985]: <warn> Connection disconnected (reason -3)
May 11 18:56:04 palms wpa_supplicant[1004]: wlan0: CTRL-EVENT-SCAN-STARTED 
May 11 18:56:04 palms wpa_supplicant[1004]: nl80211: Was expecting local disconnect but got another disconnect event first
May 11 18:56:04 palms NetworkManager[985]: <info> (wlan0): supplicant interface state: completed -> disconnected
May 11 18:56:04 palms kernel: [  852.988624] cfg80211: Calling CRDA to update world regulatory domain
May 11 18:56:04 palms kernel: [  852.991920] cfg80211: World regulatory domain updated:

(여기서 더 긴 것:http://pastebin.com/EPbp51Dz)

답변1

조금은 가능성이 있지만 로그에 다음과 공통된 메시지가 있습니다.zeroset 블로그에 게시된 것. 그(그리고 나의) 문제는 일부 어댑터와 액세스 포인트가 N 모드에서 제대로 상호 작용하지 않는다는 것입니다. 해결 방법은 N 모드를 비활성화하여 더 느린 모드로 전환하는 것입니다.

로그에 따르면 Intel 어댑터가 있는 것 같지 않지만, 그렇다면 zeroset의 솔루션을 사용해 볼 수 있습니다.

임시 해결책

임시 솔루션의 경우(예: 제안된 솔루션이 설정에 도움이 되는지 확인하려면)아이와이파이옵션이 있는 커널 모듈 11n_비활성화802.11N을 비활성화하려면 1로 설정합니다. 예:

sudo sh -c 'modprobe -r iwlwifi && modprobe iwlwifi 11n_disable=1'

커널 모듈을 다시 로드하려면 루트 권한이 필요하므로 sudo 비밀번호를 묻는 메시지가 표시됩니다.

영구 솔루션

드라이버에서 802.11N을 영구적으로 비활성화하려면 다음 행을 추가하십시오.

options iwlwifi 11n_disable=1

에게/etc/modprobe.d/iwlwifi.conf

여기서 "임시"는 다시 시작하면 되돌려진다는 의미입니다.

때로는 위와 같이 먼저 802.11N을 비활성화한 다음 다시 활성화하여 문제를 해결해야 하는 경우도 있습니다.

답변2

저도 비슷한 문제를 겪고 있었지만아니요장치는 이더넷으로도 연결할 수 있습니다. 이것이 오류 메시지에 대한 Google의 상위 결과이기 때문에 여기에 솔루션을 넣겠습니다.

나는 이것을 다음과 같이 고쳤다.라우터를 껐다가 다시 켜기.

Connection disconnected (reason -3)따라서 문제를 진단하기 위해 로그를 검토하기 시작하는 저와 같은 똑똑한 사람들을 위해아직은라우터를 다시 시작해 보세요. 인터넷 검색을 하기 전에 먼저 해보세요.

관련 정보