最近在新电脑上装了ubuntu16,结果wifi经常连不上,连上了过段时间就掉线,路由器就在电脑的旁边,而且信号非常的若.
但是windows系统没有任何问题,所以就在网上找解决办法,也按照网上的方法试了,结果好多方法都是没用的.
最后从askubuntu上找到了解决方法.
首先要查看本机的无线网卡型号:
1 lmtoo@lmtoo:~$ lspci 2 00:00.0 Host bridge: Intel Corporation Broadwell-U Host Bridge -OPI (rev 09) 3 00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics (rev 09) 4 00:03.0 Audio device: Intel Corporation Broadwell-U Audio Controller (rev 09) 5 00:04.0 Signal processing controller: Intel Corporation Broadwell-U Camarillo Device (rev 09) 6 00:14.0 USB controller: Intel Corporation Wildcat Point-LP USB xHCI Controller (rev 03) 7 00:16.0 Communication controller: Intel Corporation Wildcat Point-LP MEI Controller #1 (rev 03) 8 00:1b.0 Audio device: Intel Corporation Wildcat Point-LP High Definition Audio Controller (rev 03) 9 00:1c.0 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #1 (rev e3) 10 00:1c.1 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #2 (rev e3) 11 00:1c.2 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #3 (rev e3) 12 00:1c.3 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #4 (rev e3) 13 00:1c.4 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #5 (rev e3) 14 00:1d.0 USB controller: Intel Corporation Wildcat Point-LP USB EHCI Controller (rev 03) 15 00:1f.0 ISA bridge: Intel Corporation Wildcat Point-LP LPC Controller (rev 03) 16 00:1f.2 SATA controller: Intel Corporation Wildcat Point-LP SATA Controller [AHCI Mode] (rev 03) 17 00:1f.3 SMBus: Intel Corporation Wildcat Point-LP SMBus Controller (rev 03) 18 02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS522A PCI Express Card Reader (rev 01) 19 08:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter 20 09:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller (rev 0a) 21 0a:00.0 3D controller: NVIDIA Corporation GM108M [GeForce 940M] (rev a2)
看到第19行的是无线网卡信息,且型号为RTL8723BE.
从网上看到RTL8723系列网卡都有这个频繁掉线的问题,只不过BE版本是更新的版本,添加了一个参数.
再来查看RTL8723BE这块网卡驱动的参数信息,
1 lmtoo@lmtoo:~$ modinfo rtl8723be 2 filename: /lib/modules/4.4.0-22-generic/kernel/drivers/net/wireless/realtek/rtlwifi/rtl8723be/rtl8723be.ko 3 firmware: rtlwifi/rtl8723befw.bin 4 description: Realtek 8723BE 802.11n PCI wireless 5 license: GPL 6 author: Realtek WlanFAE <wlanfae@realtek.com> 7 author: PageHe <page_he@realsil.com.cn> 8 srcversion: 00619764255210776FAB54D 9 alias: pci:v000010ECd0000B723sv*sd*bc*sc*i* 10 depends: rtlwifi,rtl_pci,btcoexist,mac80211 11 vermagic: 4.4.0-22-generic SMP mod_unload modversions 12 parm: swlps:bool 13 parm: swenc:using hardware crypto (default 0 [hardware]) 14 (bool) 15 parm: ips:using no link power save (default 1 is open) 16 (bool) 17 parm: fwlps:using linked fw control power save (default 1 is open) 18 (bool) 19 parm: msi:Set to 1 to use MSI interrupts mode (default 0) 20 (bool) 21 parm: debug:Set debug level (0-5) (default 0) (int) 22 parm: disable_watchdog:Set to 1 to disable the watchdog (default 0) 23 (bool) 24 parm: ant_sel:Set to 1 or 2 to force antenna number (default 0) 25 (int)
看第12行到25行这几个参数,ips和fwlps是用来控制节能的,ant_sel是用来控制信号强度的.最主要的就是修改这几个参数的默认值.
首先我们把配置驱动的文件打开
lmtoo@lmtoo:~$ sudo nano /etc/modprobe.d/rtl8723be.conf
将如下参数黏贴到配置文件中:
options rtl8723be debug=1 options rtl8723be disable_watchdog=N options rtl8723be fwlps=Y options rtl8723be ips=Y options rtl8723be msi=N options rtl8723be swenc=N options rtl8723be swlps=N
options rtl8723be ant_sel=2
保存配置文件后,运行如下命令来应用配置
lmtoo@lmtoo:~$ sudo modprobe -r rtl8723be lmtoo@lmtoo:~$ sudo modprobe rtl8723be
是不是信号强了许多?
参考地址:
http://askubuntu.com/questions/526214/how-to-set-parameters-for-realtek-wifi-rtl8723
http://askubuntu.com/questions/635625/realtek-8723be-wifi-problem
http://askubuntu.com/questions/756748/inconsistent-connection-and-super-slow-speed-with-rtl8723be