我以前能够使用 Ubuntu 桌面连接到无线 AP。后来我搬到了国外，当我终于收到我的盒子时，系统不再连接到 AP。我有其他设备连接到该 AP，所以我知道它可以正常工作。我曾尝试向其他 AP 进行身份验证，但失败了。我已将无线 NIC 卡放在笔记本电脑中，NIC 工作正常。
设备能够检测到 NIC 的存在，并使用它来尝试验证网络。我查看了日志，当我进入新的 AP 时，我看到的就是这些。下面是我所看到的日志。
我的 AP 是 Netgear，我的 NIC 是 Edimax。
我没有任何主意，没有任何建议我还可以尝试什么。
lestat@france:/var/log$ tail -f auth.log syslog
==> auth.log <==
Jan 27 13:17:08 france sudo: lestat : TTY=pts/0 ; PWD=/etc/NetworkManager/system-onnections ; USER=root ; COMMAND=/usr/bin/less FRITZ!Box 7330
Jan 27 13:17:08 france sudo: pam_unix(sudo:session): session opened for user root by estat(uid=1000)
Jan 27 13:17:38 france sudo: pam_unix(sudo:session): session closed for user root
Jan 27 13:27:04 france polkitd(authority=local): Unregistered Authentication Agent for nix-session:/org/freedesktop/ConsoleKit/Session1 (system bus name :1.32, object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) (disconnected from bus)
Jan 27 13:27:37 france lightdm: pam_unix(lightdm-autologin:session): session opened for user lestat by (uid=0)
Jan 27 13:27:37 france lightdm: pam_ck_connector(lightdm-autologin:session): nox11 mode, ignoring PAM_TTY :0
Jan 27 13:27:38 france polkitd(authority=local): Registered Authentication Agent for unix-session:/org/freedesktop/ConsoleKit/Session1 (system bus name :1.27 [/usr/lib/policykit-1-gnome/polkit-gnome-authentication-agent-1], object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8)
Jan 27 13:27:41 france dbus[758]: [system] Rejected send message, 2 matched rules; type="method_call", sender=":1.43" (uid=1000 pid=1583 comm="/usr/lib/indicator-datetime/indicator-datetime-ser") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.15" (uid=0 pid=1171 comm="/usr/sbin/console-kit-daemon --no-daemon ")
Jan 27 14:17:01 france CRON[2021]: pam_unix(cron:session): session opened for user root by (uid=0)
Jan 27 14:17:01 france CRON[2021]: pam_unix(cron:session): session closed for user root
==> syslog <==
Jan 27 14:37:31 france NetworkManager[796]: <info> (wlan0): device state change: disconnected -> prepare (reason 'none') [30 40 0]
Jan 27 14:37:31 france NetworkManager[796]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
Jan 27 14:37:31 france NetworkManager[796]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
Jan 27 14:37:31 france NetworkManager[796]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
Jan 27 14:37:31 france NetworkManager[796]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
Jan 27 14:37:31 france NetworkManager[796]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
Jan 27 14:37:31 france NetworkManager[796]: <info> (wlan0): device state change: prepare -> config (reason 'none') [40 50 0]
Jan 27 14:37:31 france NetworkManager[796]: <info> Activation (wlan0/wireless): access point 'Orleans2000' has security, but secrets are required.
Jan 27 14:37:31 france NetworkManager[796]: <info> (wlan0): device state change: config -> need-auth (reason 'none') [50 60 0]
Jan 27 14:37:31 france NetworkManager[796]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
Jan 27 14:38:17 france NetworkManager[796]: get_secret_flags: assertion `is_secret_prop (setting, secret_name, error)' failed
Jan 27 14:38:17 france NetworkManager[796]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
Jan 27 14:38:17 france NetworkManager[796]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
Jan 27 14:38:17 france NetworkManager[796]: <info> (wlan0): device state change: need-auth -> prepare (reason 'none') [60 40 0]
Jan 27 14:38:17 france NetworkManager[796]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
Jan 27 14:38:17 france NetworkManager[796]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
Jan 27 14:38:17 france NetworkManager[796]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
Jan 27 14:38:17 france NetworkManager[796]: <info> (wlan0): device state change: prepare -> config (reason 'none') [40 50 0]
Jan 27 14:38:17 france NetworkManager[796]: <info> Activation (wlan0/wireless): connection 'Orleans2000' has security, and secrets exist. No new secrets needed.
Jan 27 14:38:17 france NetworkManager[796]: <info> Config: added 'ssid' value 'Orleans2000'
Jan 27 14:38:17 france NetworkManager[796]: <info> Config: added 'scan_ssid' value '1'
Jan 27 14:38:17 france NetworkManager[796]: <info> Config: added 'key_mgmt' value 'WPA-PSK'
Jan 27 14:38:17 france NetworkManager[796]: <info> Config: added 'auth_alg' value 'OPEN'
Jan 27 14:38:17 france NetworkManager[796]: <info> Config: added 'psk' value '<omitted>'
Jan 27 14:38:17 france NetworkManager[796]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
Jan 27 14:38:17 france NetworkManager[796]: <info> Config: set interface ap_scan to 1
Jan 27 14:38:17 france NetworkManager[796]: <info> (wlan0): supplicant interface state: inactive -> scanning
Jan 27 14:38:17 france wpa_supplicant[1024]: Trying to authenticate with c4:3d:c7:64:0d:25 (SSID='Orleans2000' freq=2437 MHz)
Jan 27 14:38:17 france NetworkManager[796]: <info> (wlan0): supplicant interface state: scanning -> authenticating
Jan 27 14:38:18 france kernel: [ 4259.084194] wlan0: authenticate with c4:3d:c7:64:0d:25 (try 1)
Jan 27 14:38:18 france wpa_supplicant[1024]: Trying to associate with c4:3d:c7:64:0d:25 (SSID='Orleans2000' freq=2437 MHz)
Jan 27 14:38:18 france kernel: [ 4259.086363] wlan0: authenticated
Jan 27 14:38:18 france NetworkManager[796]: <info> (wlan0): supplicant interface state: authenticating -> associating
Jan 27 14:38:18 france kernel: [ 4259.110689] wlan0: associate with c4:3d:c7:64:0d:25 (try 1)
Jan 27 14:38:18 france kernel: [ 4259.114336] wlan0: RX AssocResp from c4:3d:c7:64:0d:25 (capab=0x411 status=0 aid=2)
Jan 27 14:38:18 france kernel: [ 4259.114340] wlan0: associated
Jan 27 14:38:18 france wpa_supplicant[1024]: Associated with c4:3d:c7:64:0d:25
Jan 27 14:38:18 france kernel: [ 4259.127405] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
Jan 27 14:38:18 france NetworkManager[796]: <info> (wlan0): supplicant interface state: associating -> 4-way handshake
Jan 27 14:38:18 france wpa_supplicant[1024]: WPA: Key negotiation completed with c4:3d:c7:64:0d:25 [PTK=CCMP GTK=CCMP]
Jan 27 14:38:18 france wpa_supplicant[1024]: CTRL-EVENT-CONNECTED - Connection to c4:3d:c7:64:0d:25 completed (auth) [id=0 id_str=]
Jan 27 14:38:18 france NetworkManager[796]: <info> (wlan0): supplicant interface state: 4-way handshake -> completed
Jan 27 14:38:18 france NetworkManager[796]: <info> Activation (wlan0/wireless) Stage 2 of 5 (Device Configure) successful. Connected to wireless network 'Orleans2000'.
Jan 27 14:38:18 france NetworkManager[796]: <info> Activation (wlan0) Stage 3 of 5 (IP Configure Start) scheduled.
Jan 27 14:38:18 france NetworkManager[796]: <info> Activation (wlan0) Stage 3 of 5 (IP Configure Start) started...
Jan 27 14:38:18 france NetworkManager[796]: <info> (wlan0): device state change: config -> ip-config (reason 'none') [50 70 0]
Jan 27 14:38:18 france NetworkManager[796]: <info> Activation (wlan0) Beginning DHCPv4 transaction (timeout in 45 seconds)
Jan 27 14:38:18 france dhclient: Internet Systems Consortium DHCP Client 4.1-ESV-R4
Jan 27 14:38:18 france dhclient: Copyright 2004-2011 Internet Systems Consortium.
Jan 27 14:38:18 france dhclient: All rights reserved.
Jan 27 14:38:18 france dhclient: For info, please visit https://www.isc.org/software/dhcp/
Jan 27 14:38:18 france dhclient:
Jan 27 14:38:18 france NetworkManager[796]: <info> dhclient started with pid 2145
Jan 27 14:38:18 france NetworkManager[796]: <info> Activation (wlan0) Beginning IP6 addrconf.
Jan 27 14:38:18 france NetworkManager[796]: <info> Activation (wlan0) Stage 3 of 5 (IP Configure Start) complete.
Jan 27 14:38:18 france NetworkManager[796]: <info> (wlan0): DHCPv4 state changed nbi -> preinit
Jan 27 14:38:18 france dhclient: Listening on LPF/wlan0/80:1f:02:34:32:33
Jan 27 14:38:18 france dhclient: Sending on LPF/wlan0/80:1f:02:34:32:33
Jan 27 14:38:18 france dhclient: Sending on Socket/fallback
Jan 27 14:38:18 france dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 3
Jan 27 14:38:21 france dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 7
Jan 27 14:38:28 france kernel: [ 4269.502234] wlan0: no IPv6 routers present
Jan 27 14:38:28 france dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 10
Jan 27 14:38:38 france NetworkManager[796]: <info> (wlan0): IP6 addrconf timed out or failed.
Jan 27 14:38:38 france NetworkManager[796]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) scheduled...
Jan 27 14:38:38 france NetworkManager[796]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) started...
Jan 27 14:38:38 france NetworkManager[796]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) complete.
Jan 27 14:38:38 france dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 14
Jan 27 14:38:52 france dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 14
Jan 27 14:39:03 france NetworkManager[796]: <warn> (wlan0): DHCPv4 request timed out.
Jan 27 14:39:03 france NetworkManager[796]: <info> (wlan0): canceled DHCP transaction, DHCP client pid 2145
Jan 27 14:39:03 france NetworkManager[796]: <info> Activation (wlan0) Stage 4 of 5 (IPv4 Configure Timeout) scheduled...
Jan 27 14:39:03 france NetworkManager[796]: <info> Activation (wlan0) Stage 4 of 5 (IPv4 Configure Timeout) started...
Jan 27 14:39:03 france NetworkManager[796]: <info> (wlan0): device state change: ip-config -> failed (reason 'ip-config-unavailable') [70 120 5]
Jan 27 14:39:03 france NetworkManager[796]: <warn> Activation (wlan0) failed for access point (Orleans2000)
Jan 27 14:39:03 france NetworkManager[796]: <warn> Activation (wlan0) failed.
Jan 27 14:39:03 france NetworkManager[796]: <info> Activation (wlan0) Stage 4 of 5 (IPv4 Configure Timeout) complete.
Jan 27 14:39:03 france NetworkManager[796]: <info> (wlan0): device state change: failed -> disconnected (reason 'none') [120 30 0]
Jan 27 14:39:03 france NetworkManager[796]: <info> (wlan0): deactivating device (reason 'none') [0]
Jan 27 14:39:03 france kernel: [ 4304.436359] wlan0: deauthenticating from c4:3d:c7:64:0d:25 by local choice (reason=3)
Jan 27 14:39:03 france wpa_supplicant[1024]: CTRL-EVENT-DISCONNECTED bssid=00:00:00:00:00:00 reason=3
Jan 27 14:39:03 france NetworkManager[796]: <info> (wlan0): supplicant interface state: completed -> disconnected
Jan 27 14:39:03 france kernel: [ 4304.522687] cfg80211: All devices are disconnected, going to restore regulatory settings
Jan 27 14:39:03 france kernel: [ 4304.522692] cfg80211: Restoring regulatory settings
Jan 27 14:39:03 france kernel: [ 4304.522696] cfg80211: Calling CRDA to update world regulatory domain
Jan 27 14:39:03 france kernel: [ 4304.525578] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
Jan 27 14:39:03 france kernel: [ 4304.525581] cfg80211: World regulatory domain updated:
Jan 27 14:39:03 france kernel: [ 4304.525583] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
Jan 27 14:39:03 france kernel: [ 4304.525585] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Jan 27 14:39:03 france kernel: [ 4304.525587] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
Jan 27 14:39:03 france kernel: [ 4304.525588] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
Jan 27 14:39:03 france kernel: [ 4304.525590] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Jan 27 14:39:03 france kernel: [ 4304.525592] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Jan 27 14:39:06 france NetworkManager[796]: <info> Auto-activating connection 'Orleans2000'.
Jan 27 14:39:06 france NetworkManager[796]: <info> Activation (wlan0) starting connection 'Orleans2000'
Jan 27 14:39:06 france NetworkManager[796]: <info> (wlan0): device state change: disconnected -> prepare (reason 'none') [30 40 0]
Jan 27 14:39:06 france NetworkManager[796]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
Jan 27 14:39:06 france NetworkManager[796]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
Jan 27 14:39:06 france NetworkManager[796]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
Jan 27 14:39:06 france NetworkManager[796]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
Jan 27 14:39:06 france NetworkManager[796]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
Jan 27 14:39:06 france NetworkManager[796]: <info> (wlan0): device state change: prepare -> config (reason 'none') [40 50 0]
Jan 27 14:39:06 france NetworkManager[796]: <info> Activation (wlan0/wireless): access point 'Orleans2000' has security, but secrets are required.
Jan 27 14:39:06 france NetworkManager[796]: <info> (wlan0): device state change: config -> need-auth (reason 'none') [50 60 0]
Jan 27 14:39:06 france NetworkManager[796]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
Jan 27 14:39:06 france NetworkManager[796]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
Jan 27 14:39:06 france NetworkManager[796]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
Jan 27 14:39:06 france NetworkManager[796]: <info> (wlan0): device state change: need-auth -> prepare (reason 'none') [60 40 0]
Jan 27 14:39:06 france NetworkManager[796]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
Jan 27 14:39:06 france NetworkManager[796]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
Jan 27 14:39:06 france NetworkManager[796]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
Jan 27 14:39:06 france NetworkManager[796]: <info> (wlan0): device state change: prepare -> config (reason 'none') [40 50 0]
Jan 27 14:39:06 france NetworkManager[796]: <info> Activation (wlan0/wireless): connection 'Orleans2000' has security, and secrets exist. No new secrets needed.
Jan 27 14:39:06 france NetworkManager[796]: <info> Config: added 'ssid' value 'Orleans2000'
Jan 27 14:39:06 france NetworkManager[796]: <info> Config: added 'scan_ssid' value '1'
Jan 27 14:39:06 france NetworkManager[796]: <info> Config: added 'key_mgmt' value 'WPA-PSK'
Jan 27 14:39:06 france NetworkManager[796]: <info> Config: added 'auth_alg' value 'OPEN'
Jan 27 14:39:06 france NetworkManager[796]: <info> Config: added 'psk' value '<omitted>'
Jan 27 14:39:06 france NetworkManager[796]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
Jan 27 14:39:06 france NetworkManager[796]: <info> Config: set interface ap_scan to 1
Jan 27 14:39:06 france NetworkManager[796]: <info> (wlan0): supplicant interface state: disconnected -> scanning
Jan 27 14:40:06 france NetworkManager[796]: <warn> Activation (wlan0/wireless): association took too long.
Jan 27 14:40:06 france NetworkManager[796]: <info> (wlan0): device state change: config -> need-auth (reason 'none') [50 60 0]
Jan 27 14:40:06 france NetworkManager[796]: <warn> Activation (wlan0/wireless): asking for new secrets
Jan 27 14:40:06 france NetworkManager[796]: <warn> Couldn't disconnect supplicant interface: This interface is not connected.
Jan 27 14:40:06 france NetworkManager[796]: <warn> Couldn't disconnect supplicant interface: This interface is not connected.
Jan 27 14:40:09 france NetworkManager[796]: <info> (wlan0): supplicant interface stat e: scanning -> inactive
答案1
我在另一个论坛上得到了如何解决我的问题的答案。（参考）
sudo apt-get install --reinstall linux-headers-$(uname -r) linux-headers-generic build-essential dkms
wget https://realtek-8188cus-wireless-drivers-3444749-ubuntu-1304.googlecode.com/files/rtl8192cu-tjp-dkms_1.6_all.deb
sudo dpkg -i rtl8192cu-tjp-dkms_1.6_all.deb
echo "blacklist rtl8192cu" | sudo tee -a /etc/modprobe.d/blacklist.conf