ubuntu16.04 wifi 不稳定问题

Dear 丶 2022-03-14 14:38 345阅读 0赞

在ThinkPad X201i用ubuntu16.04已经很久了, wifi连接一直不稳定, 用几分钟就自动断开, 无奈只能重连. 查询无线网卡具体情况如下:

$ lspci

02:00.0 Network controller: Intel Corporation Centrino Wireless-N 1000 \[Condor Peak\]

$ sudo lshw -class network  
\*-network  
       description: Wireless interface  
       product: Centrino Wireless-N 1000 \[Condor Peak\]  
       vendor: Intel Corporation  
       physical id: 0  
       bus info: pci@0000:02:00.0  
       logical name: wlp2s0  
       version: 00  
       serial: 00:26:c7:69:8d:d0  
       width: 64 bits  
       clock: 33MHz  
       capabilities: pm msi pciexpress bus\_master cap\_list ethernet physical wireless  
       configuration: broadcast=yes driver=iwlwifi driverversion=4.13.0-26-generic firmware=39.31.5.1 build 35138 ip=192.168.0.107 latency=0 link=yes multicast=yes wireless=IEEE 802.11  
       resources: irq:28 memory:f2400000-f2401fff

网上搜的第一种解决方案, 感觉效果不太明显:

将/etc/ppp/options 文件中的 lcp-echo-failure 4 改为 lcp-echo-failure 40

第二种方案, 把无线网卡的power management 关掉. 试过之后效果明显, 基本上没再掉过线:

关掉之前查看wifi连接情况如下

$ sudo iwconfig  
enp0s25   no wireless extensions.

wlp2s0    IEEE 802.11  ESSID:"wonderful\_world"    
          Mode:Managed  Frequency:2.462 GHz  Access Point: 8C:A6:DF:AE:E0:17     
          Bit Rate=121.5 Mb/s   Tx-Power=14 dBm     
          Retry short limit:7   RTS thr:off   Fragment thr:off  
          Encryption key:off  
          Power Management:on  
          Link Quality=70/70  Signal level=-40 dBm    
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0  
          Tx excessive retries:115  Invalid misc:121   Missed beacon:0

lo        no wireless extensions.

关掉wifi的power management   
$ sudo iwconfig wlp2s0 power off

查看关掉之后的WiFi情况

$ sudo iwconfig

enp0s25   no wireless extensions.

wlp2s0    IEEE 802.11  ESSID:"wonderful\_world"    
          Mode:Managed  Frequency:2.462 GHz  Access Point: 8C:A6:DF:AE:E0:17     
          Bit Rate=121.5 Mb/s   Tx-Power=14 dBm     
          Retry short limit:7   RTS thr:off   Fragment thr:off  
          Encryption key:off  
          Power Management:off  
          Link Quality=70/70  Signal level=-31 dBm    
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0  
          Tx excessive retries:119  Invalid misc:132   Missed beacon:0

lo        no wireless extensions.

参考网页:

ubuntu16.04 无法wifi链接一段时间掉线且无法再连接 : http://www.mamicode.com/info-detail-1705656.html

networking - Wifi regression on 16.04 Centrino Wireless-N 1000 - Ask Ubuntu : view-source:https://askubuntu.com/questions/770681/wifi-regression-on-16-04-centrino-wireless-n-1000