我有一个 TL-WN821N wifi USB 设备，当我在 PC 上安装 Ubuntu 时，它工作正常（给我一个连接）。它下载了所有更新和其他内容，并安装了操作系统。
我甚至在安装后打开了终端，使用 ping 命令查看是否有可用的连接。结果确实如此。
现在，当我打开 Firefox 并转到网页时，它会加载该网页，然后连接就会断开，WIFI 状态指示器中仍然显示我已连接到互联网，但无法打开任何其它页面，ping 命令也不再起作用。
这可能是什么情况？
我想说的是，我现在已经习惯了网络上的帮助。使用 ndisgtk 并将一些文件添加到 /etc/modprobe
我的 Ubuntu 安装现在甚至看不到我已将此 USB 设备连接到我的计算机。我恢复了所有更改，但它仍然看不到该设备。我使用 lusb 或任何命令以及 lshw 来查看它。什么也没显示。
那么我现在能做什么呢？我怎样才能让我的电脑至少检测到该设备。
wifi脚本的信息：
########## wireless info START ##########
##### release #####
Distributor ID: Ubuntu
Description: Ubuntu 13.10
Release: 13.10
Codename: saucy
##### kernel #####
Linux kaspar-All-Series 3.11.0-19-generic #33-Ubuntu SMP Tue Mar 11 18:48:34 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
##### lspci #####
03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 0c)
Subsystem: ASUSTeK Computer Inc. Device [1043:8554]
Kernel driver in use: r8169
##### lsusb #####
Bus 002 Device 002: ID 8087:8000 Intel Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:8008 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 004: ID 0bda:8178 Realtek Semiconductor Corp. RTL8192CU 802.11n WLAN Adapter
Bus 003 Device 003: ID 1532:000d Razer USA, Ltd
Bus 003 Device 002: ID 046d:c326 Logitech, Inc.
Bus 003 Device 005: ID 0781:5406 SanDisk Corp. Cruzer Micro U3
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
##### PCMCIA Card Info #####
##### rfkill #####
##### iw reg get #####
country 00:
(2402 - 2472 @ 40), (6, 20)
(2457 - 2482 @ 40), (6, 20), PASSIVE-SCAN, NO-IBSS
(2474 - 2494 @ 20), (6, 20), NO-OFDM, PASSIVE-SCAN, NO-IBSS
(5170 - 5250 @ 80), (6, 20), PASSIVE-SCAN, NO-IBSS
(5735 - 5835 @ 80), (6, 20), PASSIVE-SCAN, NO-IBSS
(57240 - 63720 @ 2160), (N/A, 0)
##### interfaces #####
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
##### iwconfig #####
##### route #####
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
##### resolv.conf #####
##### nm-tool #####
NetworkManager Tool
State: disconnected
- Device: eth0 -----------------------------------------------------------------
Type: Wired
Driver: r8169
State: unavailable
Default: no
HW Address: <MAC address removed>
Capabilities:
Carrier Detect: yes
Wired Properties
Carrier: off
##### NetworkManager.state #####
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
##### NetworkManager.conf #####
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
[ifupdown]
managed=false
##### iwlist #####
##### iwlist channel #####
##### lsmod #####
##### modinfo #####
##### modules #####
lp
rtc
##### blacklist #####
[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci
[/etc/modprobe.d/blacklist.conf]
blacklist evbug
blacklist usbmouse
blacklist usbkbd
blacklist eepro100
blacklist de4x5
blacklist eth1394
blacklist snd_intel8x0m
blacklist snd_aw2
blacklist i2c_i801
blacklist prism54
blacklist bcm43xx
blacklist garmin_gps
blacklist asus_acpi
blacklist snd_pcsp
blacklist pcspkr
blacklist amd76x_edac
[/etc/modprobe.d/bumblebee.conf]
blacklist nouveau
blacklist nvidia
blacklist nvidia-current
blacklist nvidia-current-updates
blacklist nvidia-304
blacklist nvidia-304-updates
blacklist nvidia-experimental-304
blacklist nvidia-310
blacklist nvidia-310-updates
blacklist nvidia-experimental-310
blacklist nvidia-313
blacklist nvidia-313-updates
blacklist nvidia-experimental-313
blacklist nvidia-319
blacklist nvidia-319-updates
blacklist nvidia-experimental-319
blacklist nvidia-325
blacklist nvidia-325-updates
blacklist nvidia-experimental-325
blacklist nvidia-331
blacklist nvidia-331-updates
blacklist nvidia-experimental-331
##### udev rules #####
# PCI device 0x10ec:0x8168 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC address removed>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# USB device 0x:0x (rtl8192cu)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC address removed>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"
##### dmesg #####
########## wireless info END ############
May 20 13:01:59 kaspar-All-Series anacron[847]: Job `cron.daily' terminated
May 20 13:02:00 kaspar-All-Series dbus[618]: [system] Activating service name='com.ubuntu.ScreenResolution.Mechanism' (using servicehelper)
May 20 13:02:00 kaspar-All-Series dbus[618]: [system] Successfully activated service 'com.ubuntu.ScreenResolution.Mechanism'
May 20 13:04:27 kaspar-All-Series dbus[618]: [system] Activating service name='org.freedesktop.hostname1' (using servicehelper)
May 20 13:04:27 kaspar-All-Series dbus[618]: [system] Successfully activated service 'org.freedesktop.hostname1'
May 20 13:04:42 kaspar-All-Series AptDaemon: INFO: UpdateCache() was called
May 20 13:04:42 kaspar-All-Series AptDaemon.Trans: INFO: Queuing transaction /org/debian/apt/transaction/653acc3280a44adbbb0fb39b503c017c
May 20 13:04:42 kaspar-All-Series AptDaemon.Worker: INFO: Simulating trans: /org/debian/apt/transaction/653acc3280a44adbbb0fb39b503c017c
May 20 13:04:42 kaspar-All-Series AptDaemon.Worker: INFO: Processing transaction /org/debian/apt/transaction/653acc3280a44adbbb0fb39b503c017c
May 20 13:04:43 kaspar-All-Series AptDaemon.Worker: INFO: Updating cache
May 20 13:05:02 kaspar-All-Series AptDaemon.Worker: INFO: Finished transaction /org/debian/apt/transaction/653acc3280a44adbbb0fb39b503c017c
May 20 13:05:32 kaspar-All-Series anacron[847]: Job `cron.weekly' started
May 20 13:05:32 kaspar-All-Series anacron[3813]: Updated timestamp for job `cron.weekly' to 2014-05-20
May 20 13:05:45 kaspar-All-Series AptDaemon: INFO: CommitPackages() was called: dbus.Array([dbus.String('')], signature=dbus.Signature('s')), dbus.Array([dbus.String('')], signature=dbus.Signature('s')), dbus.Array([dbus.String('')], signature=dbus.Signature('s')), dbus.Array([dbus.String('')], signature=dbus.Signature('s')), dbus.Array([dbus.String('account-plugin-aim'), dbus.String('account-plugin-jabber'), dbus.String('account-plugin-salut'), dbus.String('account-plugin-yahoo'), dbus.String('app-install-data'), dbus.String('bash'), dbus.String('cups-browsed'), dbus.String('cups-filters'), dbus.String('cups-filters-core-drivers'), dbus.String('dpkg'), dbus.String('empathy'), dbus.String('empathy-common'), dbus.String('firefox'), dbus.String('firefox-locale-en'), dbus.String('firefox-locale-et'), dbus.String('flashplugin-installer'), dbus.String('gdb'), dbus.String('gettext'), dbus.String('gettext-base'), dbus.String('ghostscript'), dbus.String('ghostscript-x'), dbus.String('gir1.2-freedesktop'), dbus.String('gir1.2-glib-2.0'), dbus.String('gir1.2-gudev-1.0'), dbus.String('gir1.2-rb-3.0'), dbus.String('gnome-calculator'), dbus.String('gnome-control-center-shared-data'), dbus.String('icedtea-7-jre-jamvm'), dbus.String('ifupdown'), dbus.String('initramfs-tools'), dbus.String('initramfs-tools-bin'), dbus.String('iputils-arping'), dbus.String('iputils-ping'), dbus.String('iputils-tracepath'), dbus.String('libasprintf-dev'), dbus.String('libasprintf0c2'), dbus.String('libavcodec54'), dbus.String('libavformat54'), dbus.String('libavutil52'), dbus.String('libcupsfilters1'), dbus.String('libdpkg-perl'), dbus.String('libdrm-intel1'), dbus.String('libdrm-intel1:i386'), dbus.String('libdrm-nouveau2'), dbus.String('libdrm-nouveau2:i386'), dbus.String('libdrm-radeon1'), dbus.String('libdrm-radeon1:i386'), dbus.String('libdrm2'), dbus.String('libdrm2:i386'), dbus.String('libegl1-mesa'), dbus.String('libegl1-mesa-drivers'), dbus.String('libelf1'), dbus.String('libelf1:i386'), dbus.String('libfontembed1'), dbus.String('libfreetype6'), dbus.String('libfreetype6:i386'), dbus.String('libgail-common'), dbus.String('libgail18'), dbus.String('libgbm1'), dbus.String('libgettextpo-dev'), dbus.String('libgettextpo0'), dbus.String('libgexiv2-2'), dbus.String('libgirepository-1.0-1'), dbus.String('libgl1-mesa-dri'), dbus.String('libgl1-mesa-dri:i386'), dbus.String('libgl1-mesa-glx'), dbus.String('libgl1-mesa-glx:i386'), dbus.String('libglamor0'), dbus.String('libglapi-mesa'), dbus.String('libglapi-mesa:i386'), dbus.String('libgles2-mesa'), dbus.String('libgnome-control-center1'), dbus.String('libgs9'), dbus.String('libgs9-common'), dbus.String('libgtk2.0-0'), dbus.String('libgtk2.0-bin'), dbus.String('libgtk2.0-common'), dbus.String('libgudev-1.0-0'), dbus.String('libido3-0.1-0'), dbus.String('libjbig0'), dbus.String('libjbig0:i386'), dbus.String('liblightdm-gobject-1-0'), dbus.String('libmysqlclient18:i386'), dbus.String('libopenvg1-mesa'), dbus.String('libpam-systemd'), dbus.String('librhythmbox-core8'), dbus.String('libsdl1.2debian'), dbus.String('libselinux1'), dbus.String('libselinux1:i386'), dbus.String('libsmbclient'), dbus.String('libssl1.0.0'), dbus.String('libssl1.0.0:i386'), dbus.String('libswscale2'), dbus.String('libsystemd-daemon0'), dbus.String('libsystemd-journal0'), dbus.String('libsystemd-login0'), dbus.String('libtiff5'), dbus.String('libtiff5:i386'), dbus.String('libudev1'), dbus.String('libudev1:i386'), dbus.String('libunity-core-6.0-9'), dbus.String('libvlc5'), dbus.String('libvlccore7'), dbus.String('libwayland-egl1-mesa'), dbus.String('libwbclient0'), dbus.String('libxatracker2'), dbus.String('libxfont1'), dbus.String('libxml2'), dbus.String('libxml2:i386'), dbus.String('lightdm'), dbus.String('linux-firmware'), dbus.String('linux-generic'), dbus.String('linux-headers-3.13.0-24'), dbus.String('linux-headers-3.13.0-24-generic'), dbus.String('linux-headers-generic'), dbus.String('linux-image-3.13.0-24-generic'), dbus.String('linux-image-extra-3.13.0-24-generic'), dbus.String('linux-image-generic'), dbus.String('linux-libc-dev'), dbus.String('ltrace'), dbus.String('mcp-account-manager-uoa'), dbus.String('mysql-common'), dbus.String('nautilus-sendto-empathy'), dbus.String('nvidia-337'), dbus.String('nvidia-settings'), dbus.String('openjdk-7-jre'), dbus.String('openjdk-7-jre-headless'), dbus.String('openssl'), dbus.String('patch'), dbus.String('python-cupshelpers'), dbus.String('python-libxml2'), dbus.String('python-samba'), dbus.String('python3-software-properties'), dbus.String('python3-update-manager'), dbus.String('rhythmbox'), dbus.String('rhythmbox-data'), dbus.String('rhythmbox-mozilla'), dbus.String('rhythmbox-plugin-cdrecorder'), dbus.String('rhythmbox-plugin-magnatune'), dbus.String('rhythmbox-plugin-zeitgeist'), dbus.String('rhythmbox-plugins'), dbus.String('rsync'), dbus.String('samba-common'), dbus.String('samba-common-bin'), dbus.String('samba-libs'), dbus.String('smbclient'), dbus.String('software-center'), dbus.String('software-properties-common'), dbus.String('software-properties-gtk'), dbus.String('steam-launcher'), dbus.String('system-config-printer-common'), dbus.String('system-config-printer-gnome'), dbus.String('system-config-printer-udev'), dbus.String('systemd-services'), dbus.String('thunderbird'), dbus.String('thunderbird-gnome-support'), dbus.String('thunderbird-locale-en'), dbus.String('thunderbird-locale-en-gb'), dbus.String('thunderbird-locale-en-us'), dbus.String('thunderbird-locale-et'), dbus.String('tzdata'), dbus.String('tzdata-java'), dbus.String('udev'), dbus.String('unity'), dbus.String('unity-greeter'), dbus.String('unity-services'), dbus.String('update-manager'), dbus.String('update-manager-core'), dbus.String('vlc'), dbus.String('vlc-data'), dbus.String('vlc-nox'), dbus.String('vlc-plugin-notify'), dbus.String('vlc-plugin-pulse'), dbus.String('xserver-xorg-video-ati'), dbus.String('xserver-xorg-video-glamoregl'), dbus.String('xserver-xorg-video-intel'), dbus.String('xserver-xorg-video-nouveau'), dbus.String('xserver-xorg-video-radeon')], signature=dbus.Signature('s')), dbus.Array([dbus.String('')], signature=dbus.Signature('s'))
May 20 13:05:45 kaspar-All-Series AptDaemon.Trans: INFO: Queuing transaction /org/debian/apt/transaction/cc1925d70e1446e787796b1de148b4f5
May 20 13:05:45 kaspar-All-Series AptDaemon.Worker: INFO: Simulating trans: /org/debian/apt/transaction/cc1925d70e1446e787796b1de148b4f5
May 20 13:05:45 kaspar-All-Series AptDaemon.Worker: INFO: Committing packages: dbus.Array([], signature=dbus.Signature('s')), dbus.Array([], signature=dbus.Signature('s')), dbus.Array([], signature=dbus.Signature('s')), dbus.Array([], signature=dbus.Signature('s')), dbus.Array([dbus.String('account-plugin-aim'), dbus.String('account-plugin-jabber'), dbus.String('account-plugin-salut'), dbus.String('account-plugin-yahoo'), dbus.String('app-install-data'), dbus.String('bash'), dbus.String('cups-browsed'), dbus.String('cups-filters'), dbus.String('cups-filters-core-drivers'), dbus.String('dpkg'), dbus.String('empathy'), dbus.String('empathy-common'), dbus.String('firefox'), dbus.String('firefox-locale-en'), dbus.String('firefox-locale-et'), dbus.String('flashplugin-installer'), dbus.String('gdb'), dbus.String('gettext'), dbus.String('gettext-base'), dbus.String('ghostscript'), dbus.String('ghostscript-x'), dbus.String('gir1.2-freedesktop'), dbus.String('gir1.2-glib-2.0'), dbus.String('gir1.2-gudev-1.0'), dbus.String('gir1.2-rb-3.0'), dbus.String('gnome-calculator'), dbus.String('gnome-control-center-shared-data'), dbus.String('icedtea-7-jre-jamvm'), dbus.String('ifupdown'), dbus.String('initramfs-tools'), dbus.String('initramfs-tools-bin'), dbus.String('iputils-arping'), dbus.String('iputils-ping'), dbus.String('iputils-tracepath'), dbus.String('libasprintf-dev'), dbus.String('libasprintf0c2'), dbus.String('libavcodec54'), dbus.String('libavformat54'), dbus.String('libavutil52'), dbus.String('libcupsfilters1'), dbus.String('libdpkg-perl'), dbus.String('libdrm-intel1'), dbus.String('libdrm-intel1:i386'), dbus.String('libdrm-nouveau2'), dbus.String('libdrm-nouveau2:i386'), dbus.String('libdrm-radeon1'), dbus.String('libdrm-radeon1:i386'), dbus.String('libdrm2'), dbus.String('libdrm2:i386'), dbus.String('libegl1-mesa'), dbus.String('libegl1-mesa-drivers'), dbus.String('libelf1'), dbus.String('libelf1:i386'), dbus.String('libfontembed1'), dbus.String('libfreetype6'), dbus.String('libfreetype6:i386'), dbus.String('libgail-common'), dbus.String('libgail18'), dbus.String('libgbm1'), dbus.String('libgettextpo-dev'), dbus.String('libgettextpo0'), dbus.String('libgexiv2-2'), dbus.String('libgirepository-1.0-1'), dbus.String('libgl1-mesa-dri'), dbus.String('libgl1-mesa-dri:i386'), dbus.String('libgl1-mesa-glx'), dbus.String('libgl1-mesa-glx:i386'), dbus.String('libglamor0'), dbus.String('libglapi-mesa'), dbus.String('libglapi-mesa:i386'), dbus.String('libgles2-mesa'), dbus.String('libgnome-control-center1'), dbus.String('libgs9'), dbus.String('libgs9-common'), dbus.String('libgtk2.0-0'), dbus.String('libgtk2.0-bin'), dbus.String('libgtk2.0-common'), dbus.String('libgudev-1.0-0'), dbus.String('libido3-0.1-0'), dbus.String('libjbig0'), dbus.String('libjbig0:i386'), dbus.String('liblightdm-gobject-1-0'), dbus.String('libmysqlclient18:i386'), dbus.String('libopenvg1-mesa'), dbus.String('libpam-systemd'), dbus.String('librhythmbox-core8'), dbus.String('libsdl1.2debian'), dbus.String('libselinux1'), dbus.String('libselinux1:i386'), dbus.String('libsmbclient'), dbus.String('libssl1.0.0'), dbus.String('libssl1.0.0:i386'), dbus.String('libswscale2'), dbus.String('libsystemd-daemon0'), dbus.String('libsystemd-journal0'), dbus.String('libsystemd-login0'), dbus.String('libtiff5'), dbus.String('libtiff5:i386'), dbus.String('libudev1'), dbus.String('libudev1:i386'), dbus.String('libunity-core-6.0-9'), dbus.String('libvlc5'), dbus.String('libvlccore7'), dbus.String('libwayland-egl1-mesa'), dbus.String('libwbclient0'), dbus.String('libxatracker2'), dbus.String('libxfont1'), dbus.String('libxml2'), dbus.String('libxml2:i386'), dbus.String('lightdm'), dbus.String('linux-firmware'), dbus.String('linux-generic'), dbus.String('linux-headers-3.13.0-24'), dbus.String('linux-headers-3.13.0-24-generic'), dbus.String('linux-headers-generic'), dbus.String('linux-image-3.13.0-24-generic'), dbus.String('linux-image-extra-3.13.0-24-generic'), dbus.String('linux-image-generic'), dbus.String('linux-libc-dev'), dbus.String('ltrace'), dbus.String('mcp-account-manager-uoa'), dbus.String('mysql-common'), dbus.String('nautilus-sendto-empathy'), dbus.String('nvidia-337'), dbus.String('nvidia-settings'), dbus.String('openjdk-7-jre'), dbus.String('openjdk-7-jre-headless'), dbus.String('openssl'), dbus.String('patch'), dbus.String('python-cupshelpers'), dbus.String('python-libxml2'), dbus.String('python-samba'), dbus.String('python3-software-properties'), dbus.String('python3-update-manager'), dbus.String('rhythmbox'), dbus.String('rhythmbox-data'), dbus.String('rhythmbox-mozilla'), dbus.String('rhythmbox-plugin-cdrecorder'), dbus.String('rhythmbox-plugin-magnatune'), dbus.String('rhythmbox-plugin-zeitgeist'), dbus.String('rhythmbox-plugins'), dbus.String('rsync'), dbus.String('samba-common'), dbus.String('samba-common-bin'), dbus.String('samba-libs'), dbus.String('smbclient'), dbus.String('software-center'), dbus.String('software-properties-common'), dbus.String('software-properties-gtk'), dbus.String('steam-launcher'), dbus.String('system-config-printer-common'), dbus.String('system-config-printer-gnome'), dbus.String('system-config-printer-udev'), dbus.String('systemd-services'), dbus.String('thunderbird'), dbus.String('thunderbird-gnome-support'), dbus.String('thunderbird-locale-en'), dbus.String('thunderbird-locale-en-gb'), dbus.String('thunderbird-locale-en-us'), dbus.String('thunderbird-locale-et'), dbus.String('tzdata'), dbus.String('tzdata-java'), dbus.String('udev'), dbus.String('unity'), dbus.String('unity-greeter'), dbus.String('unity-services'), dbus.String('update-manager'), dbus.String('update-manager-core'), dbus.String('vlc'), dbus.String('vlc-data'), dbus.String('vlc-nox'), dbus.String('vlc-plugin-notify'), dbus.String('vlc-plugin-pulse'), dbus.String('xserver-xorg-video-ati'), dbus.String('xserver-xorg-video-glamoregl'), dbus.String('xserver-xorg-video-intel'), dbus.String('xserver-xorg-video-nouveau'), dbus.String('xserver-xorg-video-radeon')], signature=dbus.Signature('s')), dbus.Array([], signature=dbus.Signature('s'))
May 20 13:05:46 kaspar-All-Series AptDaemon.Worker: INFO: Processing transaction /org/debian/apt/transaction/cc1925d70e1446e787796b1de148b4f5
May 20 13:06:17 kaspar-All-Series anacron[847]: Job `cron.weekly' terminated
May 20 13:06:41 kaspar-All-Series AptDaemon.Trans: INFO: Cancelling transaction /org/debian/apt/transaction/cc1925d70e1446e787796b1de148b4f5
May 20 13:06:42 kaspar-All-Series AptDaemon.Worker: INFO: Finished transaction /org/debian/apt/transaction/cc1925d70e1446e787796b1de148b4f5
May 20 13:06:51 kaspar-All-Series NetworkManager[932]: <info> (wlan0): device state change: activated -> unavailable (reason 'none') [100 20 0]
May 20 13:06:51 kaspar-All-Series NetworkManager[932]: <info> (wlan0): deactivating device (reason 'none') [0]
May 20 13:06:51 kaspar-All-Series NetworkManager[932]: <info> (wlan0): canceled DHCP transaction, DHCP client pid 1172
May 20 13:06:51 kaspar-All-Series avahi-daemon[733]: Withdrawing address record for fe80::a2f3:c1ff:fe1c:a4a8 on wlan0.
May 20 13:06:51 kaspar-All-Series avahi-daemon[733]: Leaving mDNS multicast group on interface wlan0.IPv6 with address fe80::a2f3:c1ff:fe1c:a4a8.
May 20 13:06:51 kaspar-All-Series avahi-daemon[733]: Interface wlan0.IPv6 no longer relevant for mDNS.
May 20 13:06:51 kaspar-All-Series kernel: [ 691.260807] wlan0: deauthenticating from 00:0e:2e:6e:f4:ca by local choice (reason=3)
May 20 13:06:50 kaspar-All-Series wpa_supplicant[1051]: message repeated 7 times: [ wlan0: CTRL-EVENT-SCAN-STARTED ]
May 20 13:06:51 kaspar-All-Series wpa_supplicant[1051]: wlan0: CTRL-EVENT-DISCONNECTED bssid=00:0e:2e:6e:f4:ca reason=3 locally_generated=1
May 20 13:06:51 kaspar-All-Series avahi-daemon[733]: Withdrawing address record for 192.168.2.103 on wlan0.
May 20 13:06:51 kaspar-All-Series avahi-daemon[733]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.2.103.
May 20 13:06:51 kaspar-All-Series NetworkManager[932]: <warn> DNS: plugin dnsmasq update failed
May 20 13:06:51 kaspar-All-Series NetworkManager[932]: <info> Removing DNS information from /sbin/resolvconf
May 20 13:06:51 kaspar-All-Series dnsmasq[1490]: setting upstream servers from DBus
May 20 13:06:51 kaspar-All-Series kernel: [ 691.274986] cfg80211: Calling CRDA to update world regulatory domain
May 20 13:06:51 kaspar-All-Series avahi-daemon[733]: Interface wlan0.IPv4 no longer relevant for mDNS.
May 20 13:06:51 kaspar-All-Series whoopsie[1041]: offline
May 20 13:06:51 kaspar-All-Series kernel: [ 691.280262] cfg80211: World regulatory domain updated:
May 20 13:06:51 kaspar-All-Series kernel: [ 691.280266] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
May 20 13:06:51 kaspar-All-Series kernel: [ 691.280268] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May 20 13:06:51 kaspar-All-Series kernel: [ 691.280270] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May 20 13:06:51 kaspar-All-Series kernel: [ 691.280272] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
May 20 13:06:51 kaspar-All-Series kernel: [ 691.280273] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May 20 13:06:51 kaspar-All-Series kernel: [ 691.280275] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May 20 13:06:51 kaspar-All-Series NetworkManager[932]: <info> NetworkManager state is now DISCONNECTED
May 20 13:06:51 kaspar-All-Series NetworkManager[932]: <info> (wlan0): taking down device.
May 20 13:06:51 kaspar-All-Series dbus[618]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper)
May 20 13:06:51 kaspar-All-Series dbus[618]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
May 20 13:06:51 kaspar-All-Series NetworkManager[932]: <info> WiFi hardware radio set disabled
May 20 13:06:51 kaspar-All-Series NetworkManager[932]: <info> WiFi now disabled by radio killswitch
May 20 13:06:52 kaspar-All-Series NetworkManager[932]: <info> (wlan0): bringing up device.
May 20 13:06:52 kaspar-All-Series NetworkManager[932]: <info> WiFi hardware radio set enabled
May 20 13:06:52 kaspar-All-Series NetworkManager[932]: <info> WiFi now enabled by radio killswitch
May 20 13:06:52 kaspar-All-Series NetworkManager[932]: <info> (wlan0): bringing up device.
May 20 13:06:52 kaspar-All-Series kernel: [ 692.773533] rtl8192cu: MAC auto ON okay!
May 20 13:06:52 kaspar-All-Series kernel: [ 692.784108] rtl8192cu: Tx queue select: 0x05
May 20 13:06:53 kaspar-All-Series kernel: [ 693.140284] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
May 20 13:06:53 kaspar-All-Series NetworkManager[932]: <info> (wlan0) supports 4 scan SSIDs
May 20 13:06:53 kaspar-All-Series NetworkManager[932]: <info> (wlan0): supplicant interface state: starting -> ready
May 20 13:06:53 kaspar-All-Series NetworkManager[932]: <info> (wlan0): device state change: unavailable -> disconnected (reason 'supplicant-available') [20 30 42]
May 20 13:06:53 kaspar-All-Series NetworkManager[932]: <warn> Trying to remove a non-existant call id.
May 20 13:06:53 kaspar-All-Series wpa_supplicant[1051]: wlan0: CTRL-EVENT-SCAN-STARTED
May 20 13:06:53 kaspar-All-Series NetworkManager[932]: <info> (wlan0): supplicant interface state: ready -> disconnected
May 20 13:06:53 kaspar-All-Series NetworkManager[932]: <info> (wlan0) supports 4 scan SSIDs
May 20 13:06:53 kaspar-All-Series NetworkManager[932]: <info> Auto-activating connection 'Seened'.
答案1
我修复了这个问题。以下是使用 rtl8192cu 驱动程序的 TL-WN821N USB WIFI 棒的官方修复方法：
安装
确保已安装必要的先决条件：
sudo apt-get install linux-headers-generic build-essential dkms
克隆此存储库：
git clone https://github.com/pvaret/rtl8192cu-fixes.git
将其设置为 DKMS 模块：
sudo dkms add ./rtl8192cu-fixes
构建并安装：
sudo dkms install 8192cu/1.10
刷新模块列表：
sudo depmod -a
确保本机（和损坏的）内核驱动程序被列入黑名单：
sudo cp ./rtl8192cu-fixes/blacklist-native-rtl8192.conf /etc/modprobe.d/
某些硬件的电源管理存在已知问题。如果您的 WiFi 连接在几分钟后断开，请安装以下模块设置文件以禁用 WiFi 接口中的电源管理：
sudo cp ./rtl8192cu-fixes/8192cu-disable-power-management.conf /etc/modprobe.d/
然后重启。就完成了。
信息取自该网站：rtl8192cu-已修复
答案2
我在 ubuntu 14.04 上遇到了同样的问题，并已通过此解决方案解决，我想更新到 16.04 版本，在此版本中此问题已得到解决，或者我可以使用此解决方案解决，谢谢