RT

[@localhost ~]$ ifconfig
enp0s20u2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.42.251 netmask 255.255.255.0 broadcast 192.168.42.255
inet6 fe80::f4ba:56ff:fe10:b38f prefixlen 64 scopeid 0x20<link>
ether f6:ba:56:10:b3:8f txqueuelen 1000 (Ethernet)
RX packets 16929 bytes 5620211 (5.3 MiB)
RX errors 2 dropped 0 overruns 0 frame 2
TX packets 17833 bytes 6986116 (6.6 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enp4s0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether f0:79:59:83:4d:43 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 19
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 0 (Local Loopback)
RX packets 216 bytes 17576 (17.1 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 216 bytes 17576 (17.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 192.168.124.1 netmask 255.255.255.0 broadcast 192.168.124.255
ether 52:54:00:90:2a:65 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

[@localhost ~]$ iwconfig
enp3s0 IEEE 802.11 Nickname:""
Access Point: Not-Associated
Link Quality:5 Signal level:0 Noise level:225
Rx invalid nwid:0 invalid crypt:0 invalid misc:0
virbr0-nic no wireless extensions.
enp4s0 no wireless extensions.
virbr0 no wireless extensions.
lo no wireless extensions.
enp0s20u2 no wireless extensions.

那位能帮我看看问题出在哪里么？？

还是没搞定，已经无力吐槽，真不知道怎么继续，唉

经过不断尝试，最终发现是因为无线的驱动模块和acer-wmi 模块冲突造成的

rmmod acer-wmi 并把 blacklist acer-wmi 这个命令加入到/etc/modprobe.d/blacklist.conf再重启就可以了