几分钟后，我的Wifi连接断开了realtek8723be
安装Ubuntu 14.04 LTS后…一切正常，没有做更新…几分钟后我的wifi丢失无线连接…我必须重新启动才能再次使用它。
我的网络控制器：
Realtek Semiconductor Co.，Ltd。RTL8723BE PCIe无线网络适配器
正在使用的内核驱动程序：rtl8723be
我使用了以下脚本http://ubuntuforums.org/showthread.php?t=370108
########## wireless info START ########## Report from: 06 Jun 2015 12:41 CDT -0500 Booted last: 06 Jun 2015 12:08 CDT -0500 Script from: 21 May 2015 09:10 UTC +0000 ##### release ########################### Distributor ID: Ubuntu Description: Ubuntu 14.04.2 LTS Release: 14.04 Codename: trusty ##### kernel ############################ Linux 3.16.0-30-generic #40~14.04.1-Ubuntu SMP Thu Jan 15 17:43:14 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux Parameters: ro, quiet, splash, vt.handoff=7 ##### desktop ########################### Ubuntu ##### lspci ############################# 08:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723] Subsystem: Lenovo Device [17aa:b736] Kernel driver in use: rtl8723be 09:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 10) Subsystem: Lenovo Device [17aa:380d] 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 045e:0782 Microsoft Corp. Bus 003 Device 003: ID 0bda:b728 Realtek Semiconductor Corp. Bus 003 Device 002: ID 174f:14b8 Syntek Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub ##### PCMCIA card info ################## ##### rfkill ############################ 0: ideapad_wlan: Wireless LAN Soft blocked: no Hard blocked: no 1: hci0: Bluetooth Soft blocked: yes Hard blocked: no 2: ideapad_bluetooth: Bluetooth Soft blocked: yes Hard blocked: no 3: phy0: Wireless LAN Soft blocked: no Hard blocked: no ##### lsmod ############################# rtl8723be 85054 0 btcoexist 50304 1 rtl8723be rtl8723_common 23361 1 rtl8723be rtl_pci 26690 1 rtl8723be rtlwifi 64255 2 rtl_pci,rtl8723be mac80211 652718 3 rtl_pci,rtlwifi,rtl8723be mxm_wmi 13021 1 nouveau cfg80211 494330 2 mac80211,rtlwifi ideapad_laptop 18278 0 sparse_keymap 13948 1 ideapad_laptop wmi 19193 2 mxm_wmi,nouveau ##### interfaces ######################## auto lo iface lo inet loopback ##### ifconfig ########################## eth0 Link encap:Ethernet HWaddr UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) vmnet1 Link encap:Ethernet HWaddr inet addr:172.16.229.1 Bcast:172.16.229.255 Mask:255.255.255.0 inet6 addr: fe80::250:56ff:fec0:1/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:59 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) vmnet8 Link encap:Ethernet HWaddr inet addr:192.168.42.1 Bcast:192.168.42.255 Mask:255.255.255.0 inet6 addr: fe80::250:56ff:fec0:8/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:59 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) wlan0 Link encap:Ethernet HWaddr inet addr:192.168.1.72 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::2e33:7aff:fe18:82d5/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:25404 errors:0 dropped:0 overruns:0 frame:0 TX packets:20720 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:19104265 (19.1 MB) TX bytes:3957097 (3.9 MB) ##### iwconfig ########################## eth0 no wireless extensions. vmnet1 no wireless extensions. vmnet8 no wireless extensions. lo no wireless extensions. wlan0 IEEE 802.11bgn ESSID:"ManzanaVILot176" Mode:Managed Frequency:2.462 GHz Access Point: Bit Rate=18 Mb/s Tx-Power=20 dBm Retry short limit:7 RTS thr=2347 B Fragment thr:off Power Management:off Link Quality=46/70 Signal level=-64 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:57 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 172.16.229.0 0.0.0.0 255.255.255.0 U 0 0 0 vmnet1 192.168.1.0 0.0.0.0 255.255.255.0 U 9 0 0 wlan0 192.168.42.0 0.0.0.0 255.255.255.0 U 0 0 0 vmnet8 ##### resolv.conf ####################### nameserver 127.0.1.1 search gateway.2wire.net ##### network managers ################## Installed: NetworkManager Running: root 931 1 0 12:08 ? 00:00:00 NetworkManager ##### NetworkManager info ############### 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 [ManzanaVILot176] --------------------------------------------- Type: 802.11 WiFi Driver: rtl8723be State: connected Default: yes HW Address: Capabilities: Speed: 18 Mb/s Wireless Properties WEP Encryption: yes WPA Encryption: yes WPA2 Encryption: yes Wireless Access Points (* = current AP) INFINITUMc7qc: Infra, , Freq 2412 MHz, Rate 54 Mb/s, Strength 100 WPA WPA2 Zandunga: Infra, , Freq 2437 MHz, Rate 54 Mb/s, Strength 100 WPA2 *ManzanaVILot176:Infra, , Freq 2462 MHz, Rate 54 Mb/s, Strength 82 WPA Motorola: Infra, , Freq 2412 MHz, Rate 54 Mb/s, Strength 100 WPA2 IPv4 Settings: Address: 192.168.1.72 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 ##### NetworkManager profiles ########### [[/etc/NetworkManager/system-connections/PEMEX MOVIL]] (600 root) [ipv6] method=auto [connection] id=PEMEX MOVIL | type=802-11-wireless [802-11-wireless] ssid=PEMEX MOVIL | mac-address= [ipv4] method=auto [[/etc/NetworkManager/system-connections/ManzanaVILot176]] (600 root) [connection] id=ManzanaVILot176 | type=802-11-wireless [802-11-wireless] ssid=ManzanaVILot176 | mac-address= [ipv4] method=auto [ipv6] method=auto ##### iw reg get ######################## Region: America/Mexico_City (based on set time zone) country US: (2402 - 2472 @ 40), (3, 27) (5170 - 5250 @ 40), (3, 17) (5250 - 5330 @ 40), (3, 20), DFS (5490 - 5600 @ 40), (3, 20), DFS (5650 - 5710 @ 40), (3, 20), DFS (5735 - 5835 @ 40), (3, 30) (57240 - 63720 @ 2160), (N/A, 40) ##### iwlist channels ################### eth0 no frequency information. vmnet1 no frequency information. vmnet8 no frequency information. lo no frequency information. 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) ##### iwlist scan ####################### eth0 Interface doesn't support scanning. vmnet1 Interface doesn't support scanning. vmnet8 Interface doesn't support scanning. lo Interface doesn't support scanning. Channel occupancy: 1 APs on Frequency:2.462 GHz (Channel 11) wlan0 Scan completed : Cell 01 - Address: Channel:11 Frequency:2.462 GHz (Channel 11) Quality=70/70 Signal level=-32 dBm Encryption key:on ESSID:"ManzanaVILot176" Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s 11 Mb/s; 12 Mb/s; 18 Mb/s Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=0000001795c479af Extra: Last beacon: 0ms ago IE: WPA Version 1 Group Cipher : TKIP Pairwise Ciphers (1) : TKIP Authentication Suites (1) : PSK ##### module infos ###################### [rtl8723be] filename: /lib/modules/3.16.0-30-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723be/rtl8723be.ko firmware: rtlwifi/rtl8723befw.bin description: Realtek 8723BE 802.11n PCI wireless license: GPL author: Realtek WlanFAE author: PageHe srcversion: C94095C986767A931B924EF depends: rtlwifi,rtl8723-common,rtl_pci,btcoexist,mac80211 intree: Y vermagic: 3.16.0-30-generic SMP mod_unload modversions signer: Magrathea: Glacier signing key sig_key: 7B:E2:A7:20:0F:17:F0:0C:A0:11:F7:0E:5A:87:4C:37:E3:E0:F6:BE sig_hashalgo: sha512 parm: swlps:bool parm: swenc:using hardware crypto (default 0 [hardware]) (bool) parm: ips:using no link power save (default 1 is open) (bool) parm: fwlps:using linked fw control power save (default 1 is open) (bool) parm: msi:Set to 1 to use MSI interrupts mode (default 0) (bool) parm: debug:Set debug level (0-5) (default 0) (int) [rtl8723_common] filename: /lib/modules/3.16.0-30-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723com/rtl8723-common.ko description: Realtek RTL8723AE/RTL8723BE 802.11n PCI wireless common routines license: GPL author: Larry Finger author: Realtek WlanFAE srcversion: 7410431A59C24B1BC33226E depends: intree: Y vermagic: 3.16.0-30-generic SMP mod_unload modversions signer: Magrathea: Glacier signing key sig_key: 7B:E2:A7:20:0F:17:F0:0C:A0:11:F7:0E:5A:87:4C:37:E3:E0:F6:BE sig_hashalgo: sha512 [rtl_pci] filename: /lib/modules/3.16.0-30-generic/kernel/drivers/net/wireless/rtlwifi/rtl_pci.ko description: PCI basic driver for rtlwifi license: GPL author: Larry Finger author: Realtek WlanFAE author: lizhaoming srcversion: 3273ECD6028617EFD27E4F4 depends: mac80211,rtlwifi intree: Y vermagic: 3.16.0-30-generic SMP mod_unload modversions signer: Magrathea: Glacier signing key sig_key: 7B:E2:A7:20:0F:17:F0:0C:A0:11:F7:0E:5A:87:4C:37:E3:E0:F6:BE sig_hashalgo: sha512 [rtlwifi] filename: /lib/modules/3.16.0-30-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: 8362106E96F806A9DBAE565 depends: mac80211,cfg80211 intree: Y vermagic: 3.16.0-30-generic SMP mod_unload modversions signer: Magrathea: Glacier signing key sig_key: 7B:E2:A7:20:0F:17:F0:0C:A0:11:F7:0E:5A:87:4C:37:E3:E0:F6:BE sig_hashalgo: sha512 [mac80211] filename: /lib/modules/3.16.0-30-generic/kernel/net/mac80211/mac80211.ko license: GPL description: IEEE 802.11 subsystem srcversion: D421794D4F30DF3A540FD24 depends: cfg80211 intree: Y vermagic: 3.16.0-30-generic SMP mod_unload modversions signer: Magrathea: Glacier signing key sig_key: 7B:E2:A7:20:0F:17:F0:0C:A0:11:F7:0E:5A:87:4C:37:E3:E0:F6:BE sig_hashalgo: sha512 parm: max_nullfunc_tries:Maximum nullfunc tx tries before disconnecting (reason 4). (int) parm: max_probe_tries:Maximum probe tries before disconnecting (reason 4). (int) parm: beacon_loss_count:Number of beacon intervals before we decide beacon was lost. (int) parm: probe_wait_ms:Maximum time(ms) to wait for probe response before disconnecting (reason 4). (int) parm: ieee80211_default_rc_algo:Default rate control algorithm for mac80211 to use (charp) [cfg80211] filename: /lib/modules/3.16.0-30-generic/kernel/net/wireless/cfg80211.ko description: wireless configuration support license: GPL author: Johannes Berg srcversion: DEE8EAA48495E392CD51C2D depends: intree: Y vermagic: 3.16.0-30-generic SMP mod_unload modversions signer: Magrathea: Glacier signing key sig_key: 7B:E2:A7:20:0F:17:F0:0C:A0:11:F7:0E:5A:87:4C:37:E3:E0:F6:BE sig_hashalgo: sha512 parm: ieee80211_regdom:IEEE 802.11 regulatory domain code (charp) parm: cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool) ##### module parameters ################# [rtl8723be] debug: 0 fwlps: Y ips: Y msi: N swenc: N swlps: N [mac80211] beacon_loss_count: 7 ieee80211_default_rc_algo: minstrel_ht max_nullfunc_tries: 2 max_probe_tries: 5 probe_wait_ms: 500 [cfg80211] cfg80211_disable_40mhz_24ghz: N ieee80211_regdom: 00 ##### /etc/modules ###################### lp rtc ##### modprobe options ################## [/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/blacklist-rare-network.conf] alias net-pf-3 off alias net-pf-6 off alias net-pf-9 off alias net-pf-11 off alias net-pf-12 off alias net-pf-19 off alias net-pf-21 off alias net-pf-36 off [/etc/modprobe.d/iwlwifi.conf] remove iwlwifi \ (/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \ && /sbin/modprobe -r mac80211 [/etc/modprobe.d/mlx4.conf] softdep mlx4_core post: mlx4_en [/etc/modprobe.d/modesetting.conf] options cirrus modeset=1 options mgag200 modeset=1 [/etc/modprobe.d/vmware-fuse.conf] alias char-major-10-229 fuse ##### rc.local ########################## exit 0 ##### pm-utils ########################## ##### udev rules ######################## [/etc/udev/rules.d/70-persistent-net.rules] # PCI device 0x10ec:0x8168 (r8169) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0" # PCI device 0x10ec:0xb723 (rtl8723be) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0" ##### dmesg ############################# [ 14.797584] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 17.537314] wlan0: authenticate with [ 17.557419] wlan0: send auth to (try 1/3) [ 17.559066] wlan0: authenticated [ 17.559222] rtl8723be 0000:08:00.0 wlan0: disabling HT/VHT due to WEP/TKIP use [ 17.559226] rtl8723be 0000:08:00.0 wlan0: disabling HT as WMM/QoS is not supported by the AP [ 17.559228] rtl8723be 0000:08:00.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP [ 17.561054] wlan0: associate with (try 1/3) [ 17.565123] wlan0: RX AssocResp from (capab=0x431 status=0 aid=2) [ 17.565270] wlan0: associated [ 17.565277] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 17.630615] bridge-wlan0: device is wireless, enabling SMAC [ 17.630617] bridge-wlan0: up [ 17.630619] bridge-wlan0: attached [ 17.630912] wlan0: deauthenticating from by local choice (Reason: 2=PREV_AUTH_NOT_VALID) [ 17.663519] wlan0: authenticate with [ 17.673669] wlan0: send auth to (try 1/3) [ 17.673891] bridge-wlan0: disabling the bridge [ 17.675828] wlan0: authenticated [ 17.675922] rtl8723be 0000:08:00.0 wlan0: disabling HT/VHT due to WEP/TKIP use [ 17.675924] rtl8723be 0000:08:00.0 wlan0: disabling HT as WMM/QoS is not supported by the AP [ 17.675926] rtl8723be 0000:08:00.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP [ 17.677178] wlan0: associate with (try 1/3) [ 17.679555] wlan0: RX AssocResp from (capab=0x431 status=0 aid=2) [ 17.679703] wlan0: associated [ 17.689281] bridge-wlan0: down [ 17.689287] bridge-wlan0: detached [ 17.755541] bridge-wlan0: device is wireless, enabling SMAC [ 17.755543] bridge-wlan0: up [ 17.755546] bridge-wlan0: attached ########## wireless info END ############ 经过大量的谷歌搜索，我发现了一个新固件的post 。
- 下载rtl8723befw.bin ，将其复制到/ lib / firmware / rtlwifi /然后重新启动笔记本电脑。
-
禁用驱动程序的睡眠function：
$ echo "options rtl8723be fwlps=0" | sudo tee /etc/modprobe.d/rtl8723be.conf（我也使用
options rtl8723be fwlps=N ips=N找到信息options rtl8723be fwlps=N ips=N，它禁用了ips选项，但我没有发现必须使用它）
我还在许多post中读到蓝牙可以破坏WiFi连接，所以我也永久禁用它： $ sudo rfkill block bluetooth $ sudo update-rc.d bluetooth disable （并检查它是否已关闭sudo service bluetooth status ）
[如果你发现你仍然遇到WiFi突然sudo rmmod rtl8723be && sudo modprobe rtl8723be问题，你可以用sudo rmmod rtl8723be && sudo modprobe rtl8723be重新加载相关模块，而不必重新启动你的整个系统]
我在联想G40和HP笔记本电脑15-ac122tu上遇到这个问题时花了很多时间在多个论坛上，我发现这是一个非常常见的问题，因为WiFi无法工作或在Ubuntu 14.04上间歇性地停止工作。
对我来说，以下三个链接是相关的：
1） 如何使用Realtek RTL8723BE无线网卡？
2） Ubuntu 14.04中rtl8723be的Wifi问题
3） 几分钟后我的Wifi连接断开了realtek8723be （这篇文章）
对我有用的是这三个post和一些故障排除的混合。
我认为，针对Broadcom或Realtek WiFi适配器的Ubuntu主线包中的永久性修复将帮助用户。 这将使Ubuntu更加用户友好。 请记住，有时候音频和图形问题很常见，最近它与无线适配器相同。