就是没有可用的网络，而应该有。
尝试启动/关闭接口，重新启动网络管理器，没有任何扫描结果。
这里也没有结果：
dkms status
以下是全部信息：
########## wireless info START ##########
Report from: 27 Nov 2019 17:25 +05 +0500
Booted last: 27 Nov 2019 00:00 +05 +0500
Script from: 22 Oct 2018 03:34 UTC +0000
##### release ###########################
Distributor ID: Ubuntu
Description: Ubuntu 19.10
Release: 19.10
Codename: eoan
##### kernel ############################
Linux 5.3.0-23-generic #25-Ubuntu SMP Tue Nov 12 09:22:33 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, vt.handoff=7
##### desktop ###########################
Ubuntu
##### lspci #############################
04:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723AE PCIe Wireless Network Adapter [10ec:8723]
Subsystem: Realteksaved Semiconductor Co., Ltd. RTL8723AE PCIe Wireless Network Adapter [10ec:0726]
Kernel driver in use: rtl8723ae
##### PCMCIA card info ##################
##### rfkill ############################
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
##### interfaces ########################
[/etc/network/interfaces]
auto lo
iface lo inet loopback
##### ifconfig ##########################
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback <MAC address> brd <MAC address>
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp3s0f2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
link/ether <MAC 'enp3s0f2' [IF1]> brd <MAC address>
4: wlp4s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
link/ether <MAC 'wlp4s0' [IF2]> brd <MAC address>
5: enp0s20u3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UNKNOWN group default qlen 1000
link/ether <MAC 'enp0s20u3' [IF3]> brd <MAC address>
inet 192.168.42.131/24 brd 192.168.42.255 scope global dynamic noprefixroute enp0s20u3
valid_lft 2922sec preferred_lft 2922sec
inet6 fe80::7c90:840f:339e:e83c/64 scope link noprefixroute
valid_lft forever preferred_lft forever
##### iwconfig ##########################
enp0s20u3 no wireless extensions.
enp3s0f2 no wireless extensions.
lo no wireless extensions.
wlp4s0 IEEE 802.11 ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thr:off
Power Management:on
##### route #############################
default via 192.168.42.129 dev enp0s20u3 proto dhcp metric 100
169.254.0.0/16 dev enp0s20u3 scope link metric 1000
192.168.42.0/24 dev enp0s20u3 proto kernel scope link src 192.168.42.131 metric 100
##### resolv.conf #######################
[777 root '/etc/resolv.conf' -> '../run/systemd/resolve/stub-resolv.conf']
nameserver 127.0.0.53
options edns0
#########
CONNECTIONS.AVAILABLE-CONNECTION-PATHS: --
SSID BSSID MODE CHAN FREQ RATE SIGNAL BARS SECURITY ACTIVE IN-USE
##### NetworkManager config #############
[[/etc/NetworkManager/conf.d/default-wifi-powersave-on.conf]]
[connection]
wifi.powersave = 2
[[/etc/NetworkManager/NetworkManager.conf]]
[main]
plugins=ifupdown,keyfile
[ifupdown]
managed=false
[device]
wifi.scan-rand-mac-address=no
[[/usr/lib/NetworkManager/conf.d/10-dns-resolved.conf]]
[main]
dns=systemd-resolved
[[/usr/lib/NetworkManager/conf.d/10-globally-managed-devices.conf]]
[keyfile]
unmanaged-devices=*,except:type:wifi,except:type:gsm,except:type:cdma
[[/usr/lib/NetworkManager/conf.d/20-connectivity-ubuntu.conf]]
[connectivity]
uri=http://connectivity-check.ubuntu.com/
[[/usr/lib/NetworkManager/conf.d/no-mac-addr-change.conf]]
[device-mac-addr-change-wifi]
match-device=driver:rtl8723bs,driver:rtl8189es,driver:r8188eu,driver:8188eu,driver:eagle_sdio,driver:wl
wifi.scan-rand-mac-address=no
wifi.cloned-mac-address=preserve
ethernet.cloned-mac-address=preserve
##### Netplan config ####################
[/etc/netplan/01-network-manager-all.yaml]
network:
version: 2
renderer: NetworkManager
##### iwlist channels ###################
enp0s20u3 no frequency information.
enp3s0f2 no frequency information.
lo no frequency information.
wlp4s0 13 channels in total; available frequencies :
Channel 01 : 2.412 GHz
Channel 02 : 2.417 GHz
Channel 03 : 2.422 GHz
Channel 04 : 2.427 GHz
Channel 05 : 2.432 GHz
Channel 06 : 2.437 GHz
Channel 07 : 2.442 GHz
Channel 08 : 2.447 GHz
Channel 09 : 2.452 GHz
Channel 10 : 2.457 GHz
Channel 11 : 2.462 GHz
Channel 12 : 2.467 GHz
Channel 13 : 2.472 GHz
##### iwlist scan #######################
enp0s20u3 Interface doesn't support scanning.
enp3s0f2 Interface doesn't support scanning.
lo Interface doesn't support scanning.
wlp4s0 No scan results
##### module infos ######################
[rtl8723ae]
filename: /lib/modules/5.3.0-23-generic/kernel/drivers/net/wireless/realtek/rtlwifi/rtl8723ae/rtl8723ae.ko
firmware: rtlwifi/rtl8723efw.bin
description: Realtek 8723E 802.11n PCI wireless
license: GPL
author: Realtek WlanFAE <[email protected]>
author: lizhaoming <[email protected]>
srcversion: A4DD5713D92A721AF200844
depends: rtlwifi,rtl8723-common,rtl_pci,btcoexist,mac80211
retpoline: Y
intree: Y
name: rtl8723ae
vermagic: 5.3.0-23-generic SMP mod_unload
sig_id: PKCS#7
signer: Build time autogenerated kernel key
parm: swenc:Set to 1 for software crypto (default 0)
(bool)
parm: ips:Set to 0 to not use link power save (default 1)
(bool)
parm: swlps:Set to 1 to use SW control power save (default 1)
(bool)
parm: fwlps:Set to 1 to use FW control power save (default 0)
(bool)
parm: msi:Set to 1 to use MSI interrupts mode (default 0)
(bool)
parm: aspm:Set to 1 to enable ASPM (default 1)
(int)
parm: debug_level:Set debug level (0-5) (default 0) (int)
parm: debug_mask:Set debug mask (default 0) (ullong)
parm: disable_watchdog:Set to 1 to disable the watchdog (default 0)
(bool)
请帮忙，没有主意！