Ubuntu 14.04失去了wifi连接

我使用Ubuntu 14.04,并使用系统托盘中的网络管理器连接到wifi。 无线网络工作正常,但5分钟后我失去了互联网,但我仍然连接到wifi,我需要重新连接网络再次上网。 我从wireless_script发送日志。 我希望有人会帮我解决这个问题。 非常感谢!

########## wireless info START ########## ##### release ##### Distributor ID: Ubuntu Description: Ubuntu 14.04 LTS Release: 14.04 Codename: trusty ##### kernel ##### Linux kris-ubuntu 3.13.0-30-generic #55-Ubuntu SMP Fri Jul 4 21:40:53 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux ##### lspci ##### 04:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 03) Subsystem: Gigabyte Technology Co., Ltd Motherboard [1458:e000] Kernel driver in use: r8169 ##### lsusb ##### Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 008 Device 003: ID 04f3:0103 Elan Microelectronics Corp. ActiveJet K-2024 Multimedia Keyboard Bus 008 Device 002: ID 1532:0016 Razer USA, Ltd DeathAdder Mouse Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 002: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN Adapter Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub ##### PCMCIA Card Info ##### ##### rfkill ##### 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no ##### lsmod ##### rtl8192cu 67723 0 rtl_usb 18448 1 rtl8192cu rtlwifi 63475 2 rtl_usb,rtl8192cu rtl8192c_common 53172 1 rtl8192cu mac80211 626557 3 rtl_usb,rtlwifi,rtl8192cu cfg80211 484040 2 mac80211,rtlwifi ##### iw reg get ##### country 00: (2402 - 2472 @ 40), (3, 20) (2457 - 2482 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS (2474 - 2494 @ 20), (3, 20), NO-OFDM, PASSIVE-SCAN, NO-IBSS (5170 - 5250 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS (5735 - 5835 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS ##### interfaces ##### # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback ##### iwconfig ##### wlan0 IEEE 802.11bgn ESSID:"TNCAP2355AD-TescoBroadband" Mode:Managed Frequency:2.462 GHz Access Point:  Bit Rate=65 Mb/s Tx-Power=20 dBm Retry long limit:7 RTS thr=2347 B Fragment thr:off Power Management:off Link Quality=60/70 Signal level=-50 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:21 Missed beacon:0 ##### route ##### Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.1.254 0.0.0.0 UG 0 0 0 wlan0 192.168.1.0 0.0.0.0 255.255.255.0 U 9 0 0 wlan0 ##### resolv.conf ##### nameserver 127.0.1.1 search lan ##### nm-tool ##### NetworkManager Tool State: connected (global) - Device: eth0 ----------------------------------------------------------------- Type: Wired Driver: r8169 State: unavailable Default: no HW Address:  Capabilities: Carrier Detect: yes Wired Properties Carrier: off - Device: wlan0 [TNCAP2355AD-TescoBroadband] ---------------------------------- Type: 802.11 WiFi Driver: rtl8192cu State: connected Default: yes HW Address:  Capabilities: Speed: 65 Mb/s Wireless Properties WEP Encryption: yes WPA Encryption: yes WPA2 Encryption: yes Wireless Access Points (* = current AP) BL-MP01-DFAADC: Infra, , Freq 2462 MHz, Rate 54 Mb/s, Strength 100 *TNCAP2355AD-TescoBroadband: Infra, , Freq 2462 MHz, Rate 54 Mb/s, Strength 70 WPA WPA2 IPv4 Settings: Address: 192.168.1.101 Prefix: 24 (255.255.255.0) Gateway: 192.168.1.254 DNS: 192.168.1.254 ##### NetworkManager.state ##### [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true WimaxEnabled=true ##### NetworkManager.conf ##### [main] plugins=ifupdown,keyfile,ofono dns=dnsmasq [ifupdown] managed=false ##### iwlist ##### wlan0 Scan completed : Cell 01 - Address:  Channel:11 Frequency:2.462 GHz (Channel 11) Quality=62/70 Signal level=-48 dBm Encryption key:on ESSID:"TNCAP2355AD-TescoBroadband" Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s 24 Mb/s; 36 Mb/s; 54 Mb/s Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s Mode:Master Extra:tsf=0000003585d7ba52 Extra: Last beacon: 8ms ago IE: Unknown: 001A544E4341503233353541442D546573636F42726F616462616E64 IE: Unknown: 010882848B962430486C IE: Unknown: 03010B IE: Unknown: 2A0104 IE: Unknown: 2F0104 IE: IEEE 802.11i/WPA2 Version 1 Group Cipher : TKIP Pairwise Ciphers (1) : CCMP Authentication Suites (1) : PSK IE: Unknown: 32040C121860 IE: Unknown: 2D1A1E181BFFFF000000000000000000000000000000000000000000 IE: Unknown: 3D160B080400000000000000000000000000000000000000 IE: Unknown: 4A0E14000A002C01C800140005001900 IE: Unknown: 7F0101 IE: Unknown: DD9B0050F204104A0001101044000102103B0001031047001092DD212FAE0F5466B45D5AB5C22E90F31021000B546563686E69636F6C6F721023000E546563686E69636F6C6F72205447102400043538326E10420010623736663736343562336131623566391054000800060050F204000110110012546563686E69636F6C6F722054473538326E100800020004103C0001011049000600372A000120 IE: Unknown: DD090010180206000C0000 IE: WPA Version 1 Group Cipher : TKIP Pairwise Ciphers (1) : TKIP Authentication Suites (1) : PSK IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00 Cell 02 - Address:  Channel:11 Frequency:2.462 GHz (Channel 11) Quality=70/70 Signal level=-10 dBm Encryption key:off ESSID:"BL-MP01-DFAADC" Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s 18 Mb/s; 36 Mb/s; 54 Mb/s Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s Mode:Master Extra:tsf=0000000b1d41fa49 Extra: Last beacon: 8ms ago IE: Unknown: 000E424C2D4D5030312D444641414443 IE: Unknown: 010882848B961224486C IE: Unknown: 03010B IE: Unknown: 2A0104 IE: Unknown: 32040C183060 IE: Unknown: 2D1A6E1117FF000000010000000000000000000000000C0000000000 IE: Unknown: 3D160B070000000000000000000000000000000000000000 IE: Unknown: 3E0100 IE: Unknown: DD180050F2020101030003A4000027A4000042435E0062322F00 IE: Unknown: 0B0500001D127A IE: Unknown: DD07000C4307000000 ##### iwlist channel ##### wlan0 11 channels in total; available frequencies : Channel 01 : 2.412 GHz Channel 02 : 2.417 GHz Channel 03 : 2.422 GHz Channel 04 : 2.427 GHz Channel 05 : 2.432 GHz Channel 06 : 2.437 GHz Channel 07 : 2.442 GHz Channel 08 : 2.447 GHz Channel 09 : 2.452 GHz Channel 10 : 2.457 GHz Channel 11 : 2.462 GHz Current Frequency:2.462 GHz (Channel 11) ##### modinfo ##### filename: /lib/modules/3.13.0-30-generic/kernel/drivers/net/wireless/rtlwifi/rtl8192cu/rtl8192cu.ko firmware: rtlwifi/rtl8192cufw_TMSC.bin firmware: rtlwifi/rtl8192cufw_B.bin firmware: rtlwifi/rtl8192cufw_A.bin firmware: rtlwifi/rtl8192cufw.bin description: Realtek 8192C/8188C 802.11n USB wireless license: GPL author: Larry Finger  author: Ziv Huang  author: Georgia  srcversion: A4F9BAD0CEC9B9B92666E34 alias: usb:v7392p7822d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v2357p0100d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v20F4p624Dd*dc*dsc*dp*ic*isc*ip*in* alias: usb:v2019pAB2Bd*dc*dsc*dp*ic*isc*ip*in* alias: usb:v2001p330Ad*dc*dsc*dp*ic*isc*ip*in* alias: usb:v2001p3309d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v2001p3307d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0E66p0019d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0DF6p0061d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp8186d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0B05p17ABd*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0846pF001d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0846p9021d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v07B8p8178d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v07AAp0056d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0586p341Fd*dc*dsc*dp*ic*isc*ip*in* alias: usb:v050Dp2103d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v050Dp2102d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v050Dp1004d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v2019p1201d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v04F2pAFFCd*dc*dsc*dp*ic*isc*ip*in* alias: usb:v04F2pAFFBd*dc*dsc*dp*ic*isc*ip*in* alias: usb:v04F2pAFF8d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v04F2pAFFAd*dc*dsc*dp*ic*isc*ip*in* alias: usb:v04F2pAFF9d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v04F2pAFF7d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp317Fd*dc*dsc*dp*ic*isc*ip*in* alias: usb:v9846p9041d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v4855p0091d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v4855p0090d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v13D3p3359d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v13D3p3358d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v7392p7811d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v20F4p648Bd*dc*dsc*dp*ic*isc*ip*in* alias: usb:v2019pED17d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v2019pAB2Ed*dc*dsc*dp*ic*isc*ip*in* alias: usb:v2019pAB2Ad*dc*dsc*dp*ic*isc*ip*in* alias: usb:v2019p4902d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v2001p3308d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v13D3p3357d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v103Cp1629d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v4856p0091d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0EB0p9071d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0DF6p0077d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0DF6p005Cd*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0DF6p0052d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp5088d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0846p9041d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v07B8p8189d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v07B8p8188d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v06F8pE033d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v050Dp11F2d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v050Dp1102d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp817Cd*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp8178d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp8754d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp819Ad*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp818Ad*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp817Fd*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp817Ed*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp817Dd*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp817Bd*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp817Ad*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp8177d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp8176d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp8170d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp018Ad*dc*dsc*dp*ic*isc*ip*in* alias: usb:v0BDAp8191d*dc*dsc*dp*ic*isc*ip*in* depends: rtlwifi,rtl8192c-common,rtl_usb,mac80211 intree: Y vermagic: 3.13.0-30-generic SMP mod_unload modversions signer: Magrathea: Glacier signing key sig_key: :CE:B2:C5:67:D2:52:22:6B:47:71:2C:FD:8A:F6 sig_hashalgo: sha512 parm: swenc:Set to 1 for software crypto (default 0) (bool) parm: debug:Set debug level (0-5) (default 0) (int) filename: /lib/modules/3.13.0-30-generic/kernel/drivers/net/wireless/rtlwifi/rtl_usb.ko description: USB basic driver for rtlwifi license: GPL author: Larry Finger  author: Realtek WlanFAE  author: lizhaoming  srcversion: 5F97DAF0B5791785FB2AA02 depends: rtlwifi,mac80211 intree: Y vermagic: 3.13.0-30-generic SMP mod_unload modversions signer: Magrathea: Glacier signing key sig_key: :CE:B2:C5:67:D2:52:22:6B:47:71:2C:FD:8A:F6 sig_hashalgo: sha512 filename: /lib/modules/3.13.0-30-generic/kernel/drivers/net/wireless/rtlwifi/rtlwifi.ko description: Realtek 802.11n PCI wireless core license: GPL author: Larry Finger  author: Realtek WlanFAE  author: lizhaoming  srcversion: 27E91755814596D634B7709 depends: mac80211,cfg80211 intree: Y vermagic: 3.13.0-30-generic SMP mod_unload modversions signer: Magrathea: Glacier signing key sig_key: :CE:B2:C5:67:D2:52:22:6B:47:71:2C:FD:8A:F6 sig_hashalgo: sha512 filename: /lib/modules/3.13.0-30-generic/kernel/drivers/net/wireless/rtlwifi/rtl8192c/rtl8192c-common.ko description: Realtek 8192C/8188C 802.11n PCI wireless license: GPL author: Larry Finger  author: Ziv Huang  author: Georgia  author: Realtek WlanFAE  author: lizhaoming  srcversion: 32F826C623BC49F764F7974 depends: intree: Y vermagic: 3.13.0-30-generic SMP mod_unload modversions signer: Magrathea: Glacier signing key sig_key: :CE:B2:C5:67:D2:52:22:6B:47:71:2C:FD:8A:F6 sig_hashalgo: sha512 ##### 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 blacklist r8192se_pci [/etc/modprobe.d/fbdev-blacklist.conf] blacklist arkfb blacklist aty128fb blacklist atyfb blacklist radeonfb blacklist cirrusfb blacklist cyber2000fb blacklist gx1fb blacklist gxfb blacklist kyrofb blacklist matroxfb_base blacklist mb862xxfb blacklist neofb blacklist nvidiafb blacklist pm2fb blacklist pm3fb blacklist s3fb blacklist savagefb blacklist sisfb blacklist tdfxfb blacklist tridentfb blacklist viafb blacklist vt8623fb ##### udev rules ##### # PCI device 0x10ec:0x8168 (r8169) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0" # USB device 0x:0x (rtl8192cu) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0" # USB device 0x:0x (rtl8192cu) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan1" # USB device 0x:0x (rtl8192cu) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan2" # USB device 0x:0x (rtl8192cu) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan3" # USB device 0x:0x (rtl8192cu) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan4" ##### dmesg ##### [ 24.589019] rtl8192cu: Chip version 0x10 [ 24.669363] rtl8192cu: MAC address:  [ 24.669370] rtl8192cu: Board Type 0 [ 24.669629] rtl_usb: rx_max_size 15360, rx_urb_num 8, in_ep 1 [ 24.669672] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin [ 24.671316] Error: Driver 'rtl8192cu' is already registered, aborting... [ 24.688251] Error: Driver 'rtl8192cu' is already registered, aborting... [ 25.086302] ieee80211 phy0: Selected rate control algorithm 'rtl_rc' [ 25.086904] rtlwifi: wireless switch is on [ 29.508804] rtl8192cu: MAC auto ON okay! [ 29.541401] rtl8192cu: Tx queue select: 0x05 [ 29.905140] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 29.905474] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 31.146029] wlan0: authenticate with  [ 31.159549] wlan0: send auth to  (try 1/3) [ 31.162235] wlan0: authenticated [ 31.163717] wlan0: associate with  (try 1/3) [ 31.190499] wlan0: RX AssocResp from  (capab=0x411 status=0 aid=2) [ 31.190563] wlan0: associated [ 31.190577] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 529.724439] wlan0: deauthenticating from  by local choice (reason=3) [ 530.529830] wlan0: authenticate with  [ 530.543886] wlan0: send auth to  (try 1/3) [ 530.556268] wlan0: authenticated [ 530.556786] wlan0: associate with  (try 1/3) [ 530.562624] wlan0: RX AssocResp from  (capab=0x411 status=0 aid=2) [ 530.562682] wlan0: associated [ 872.035718] wlan0: deauthenticating from  by local choice (reason=3) [ 872.815570] wlan0: authenticate with  [ 872.828640] wlan0: send auth to  (try 1/3) [ 872.850009] wlan0: authenticated [ 872.851193] wlan0: associate with  (try 1/3) [ 872.874119] wlan0: RX AssocResp from  (capab=0x411 status=0 aid=2) [ 872.874159] wlan0: associated [ 2990.208348] wlan0: deauthenticating from  by local choice (reason=3) [ 2990.989410] wlan0: authenticate with  [ 2991.001577] wlan0: send auth to  (try 1/3) [ 2991.013158] wlan0: authenticated [ 2991.016646] wlan0: associate with  (try 1/3) [ 2991.096376] wlan0: RX AssocResp from  (capab=0x411 status=0 aid=2) [ 2991.096412] wlan0: associated [ 3315.946936] wlan0: deauthenticating from  by local choice (reason=3) [ 3316.757009] wlan0: authenticate with  [ 3316.769436] wlan0: send auth to  (try 1/3) [ 3316.771528] wlan0: authenticated [ 3316.772367] wlan0: associate with  (try 1/3) [ 3316.794330] wlan0: RX AssocResp from  (capab=0x411 status=0 aid=2) [ 3316.794374] wlan0: associated ########## wireless info END ############ 

安装常见wifi驱动程序:

 sudo apt-get install build-essential libssl-dev linux-headers-`uname -r` linux-firmware-nonfree` 

潜在的能量控制问题。 尝试关闭界面上的能量控制:

 sudo iwconfig wlan0 power off 

wlan0更改为您的实际接口名称。

注意:每次连接到网络时都必须这样做。