关闭无线网卡的power management：
sudo iwconfig 查看当前状态：
lo no wireless extensions.
enp7s0 no wireless extensions.
wlp8s0 IEEE 802.11 ESSID:"CU_cEgF" Mode:Managed Frequency:2.452 GHz Access Point: 94:BF:80:7C:8A:08 Bit Rate=65 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=-27 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:105 Missed beacon:0
sudo iwconfig wlp8s0 power off 关闭power management
sudo iwconfig 查看当前状态：
lo no wireless extensions.
enp7s0 no wireless extensions.
wlp8s0 IEEE 802.11 ESSID:"CU_cEgF" Mode:Managed Frequency:2.452 GHz Access Point: 94:BF:80:7C:8A:08 Bit Rate=57.8 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=-27 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:1 Invalid misc:107 Missed beacon:0
