解决Ubuntu22.04 Wifi连接断开的问题

1.修改/etc/ppp/options文件

将其中的lcpe-echo-failure 的参数改为40

2.将无线网卡的power management 关掉

查看

$ sudo iwconfig
    lo        no wireless extensions.
   
    wlp5s0    IEEE 802.11  ESSID:"\xE7\xA6\x8F\xE7\xBC\x98\xE5\x96\x84\xE5\xBA\x86"  
              Mode:Managed  Frequency:2.472 GHz  Access Point: 44:97:5A:04:87:DA  
              Bit Rate=15 Mb/s   Tx-Power=22 dBm  
              Retry short limit:7   RTS thr:off   Fragment thr:off
              Encryption key:off
              Power Management:off
              Link Quality=22/70  Signal level=-88 dBm  
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:0  Invalid misc:18   Missed beacon:0
   
    enp4s0    no wireless extensions.
# 关闭
$ sudo iwconfig wlp5s0 power off