我正在使用Ubuntu 16.04并且遇到了一个已知的问题，即wifi随机失败，图标仍显示连接但没有连接可用。这不是以前的问题，并且经常突然发生，没有明显的原因。
如果有人能找到这个设置的解决方案，我会非常感激，因为这个问题使我的系统无法使用。
到目前为止，我试图通过以下方式解决问题：
SUSPEND_MODULES="rtl8821ae"
service network-manager restart
#!/bin/sh
case "${1}" in
resume|thaw)
nmcli nm sleep false
;;
esac
要么
#!/bin/sh
case "${1}" in
resume|thaw)
nmcli r wifi off && nmcli r wifi on ;;
esac
#/etc/systemd/system/wifi-resume.service
#sudo systemctl enable wifi-resume.service
[Unit]
Description=Restart networkmanager at resume
After=suspend.target
After=hibernate.target
After=hybrid-sleep.target
[Service]
Type=oneshot
ExecStart=/bin/systemctl restart network-manager.service
[Install]
WantedBy=suspend.target
WantedBy=hibernate.target
WantedBy=hybrid-sleep.target
options rtl8821ae fwlps=N
options rtl8821ae swenc=1
sudo apt-get install linux-headers-generic build-essential git
git clone http://github.com/lwfinger/rtlwifi_new.git
cd rtlwifi_new
make
sudo make install
以下是我的无线信息：
########## wireless info START ##########
Report from: 08 May 2017 13:02 ICT +0700
Booted last: 08 May 2017 00:00 ICT +0700
Script from: 25 Mar 2017 07:04 UTC +0000
##### release ###########################
Distributor ID: Ubuntu Description: Ubuntu 16.04.2 LTS Release: 16.04 Codename: xenial
##### kernel ############################
Linux 4.4.0-75-generic #96-Ubuntu SMP Thu Apr 20 09:56:33 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, vt.handoff=7
##### desktop ###########################
Ubuntu
##### lspci #############################
01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 10) Subsystem: Lenovo RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [17aa:384c] Kernel driver in use: r8169
02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8821AE 802.11ac PCIe Wireless Network Adapter [10ec:8821] Subsystem: Lenovo RTL8821AE 802.11ac PCIe Wireless Network Adapter [17aa:a814] Kernel driver in use: rtl8821ae
##### lsusb #############################
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 005: ID 0bda:0821 Realtek Semiconductor Corp. Bus 001 Device 004: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller Bus 001 Device 003: ID 04f2:b57e Chicony Electronics Co., Ltd Bus 001 Device 002: ID 046d:c077 Logitech, Inc. M105 Optical Mouse Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
##### PCMCIA card info ##################
##### rfkill ############################
0: ideapad_wlan: Wireless LAN Soft blocked: no Hard blocked: no 1: ideapad_bluetooth: Bluetooth Soft blocked: no Hard blocked: no 2: hci0: Bluetooth Soft blocked: no Hard blocked: no 6: phy0: Wireless LAN Soft blocked: no Hard blocked: no
##### lsmod #############################
rtl8821ae 225280 0 btcoexist 53248 1 rtl8821ae rtl_pci 28672 1 rtl8821ae rtlwifi 77824 2 rtl_pci,rtl8821ae mac80211 737280 3 rtl_pci,rtlwifi,rtl8821ae cfg80211 565248 2 mac80211,rtlwifi ideapad_laptop 24576 0 sparse_keymap 16384 1 ideapad_laptop mxm_wmi 16384 1 nouveau wmi 20480 3 ideapad_laptop,mxm_wmi,nouveau video 40960 3 i915_bpo,ideapad_laptop,nouveau
##### interfaces ########################
auto lo iface lo inet loopback
##### ifconfig ##########################
docker0 Link encap:Ethernet HWaddr <MAC 'docker0' [IF1]>
inet addr:172.17.0.1 Bcast:0.0.0.0 Mask:255.255.0.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
enp1s0 Link encap:Ethernet HWaddr <MAC 'enp1s0' [IF2]>
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:3771 errors:0 dropped:0 overruns:0 frame:0
TX packets:3771 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:366844 (366.8 KB) TX bytes:366844 (366.8 KB)
wlp2s0 Link encap:Ethernet HWaddr <MAC 'wlp2s0' [IF3]>
inet addr:192.168.1.51 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::5f5:68c6:8ccf:2c5c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1686 errors:0 dropped:0 overruns:0 frame:0
TX packets:2943 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:152100 (152.1 KB) TX bytes:4142898 (4.1 MB)
##### iwconfig ##########################
lo no wireless extensions.
enp1s0 no wireless extensions.
docker0 no wireless extensions.
wlp2s0 IEEE 802.11abgn ESSID:"ROUND ABOUT"
Mode:Managed Frequency:5.805 GHz Access Point: <MAC 'ROUND ABOUT' [AN4]>
Bit Rate=150 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thr:off
Power Management:off
Link Quality=64/70 Signal level=-46 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:32 Missed beacon:0
##### route #############################
Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 600 0 0 wlp2s0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 docker0
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlp2s0
##### resolv.conf #######################
nameserver 127.0.1.1
##### network managers ##################
Installed:
NetworkManager
Running:
root 859 1 0 12:45 ? 00:00:03 /usr/sbin/NetworkManager --no-daemon
##### NetworkManager info ###############
GENERAL.DEVICE: docker0 GENERAL.TYPE: bridge GENERAL.NM-TYPE: NMDeviceBridge GENERAL.VENDOR: GENERAL.PRODUCT: GENERAL.DRIVER: bridge GENERAL.DRIVER-VERSION:
2.3 GENERAL.FIRMWARE-VERSION: N/A GENERAL.HWADDR: <MAC 'docker0' [IF1]> GENERAL.MTU: 1500 GENERAL.STATE: 100 (connected) GENERAL.REASON: 0 (No reason given) GENERAL.UDI: /sys/devices/virtual/net/docker0 GENERAL.IP-IFACE: docker0 GENERAL.IS-SOFTWARE: yes GENERAL.NM-MANAGED: yes GENERAL.AUTOCONNECT: yes GENERAL.FIRMWARE-MISSING: no GENERAL.NM-PLUGIN-MISSING: no GENERAL.PHYS-PORT-ID:
-- GENERAL.CONNECTION: docker0 GENERAL.CON-UUID: 87779905-948b-4923-90a9-a9fdeb019c8c GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/1 GENERAL.METERED: no (guessed) CAPABILITIES.CARRIER-DETECT: yes CAPABILITIES.SPEED: unknown CAPABILITIES.IS-SOFTWARE: yes BRIDGE.SLAVES: CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{23} CONNECTIONS.AVAILABLE-CONNECTIONS[1]: 87779905-948b-4923-90a9-a9fdeb019c8c | docker0 IP4.ADDRESS[1]:
172.17.0.1/16 IP4.GATEWAY: IP4.ROUTE[1]: dst = 169.254.0.0/16, nh = 0.0.0.0, mt = 1000 IP6.GATEWAY:
GENERAL.DEVICE: wlp2s0 GENERAL.TYPE: wifi GENERAL.NM-TYPE: NMDeviceWifi GENERAL.VENDOR: Realtek Semiconductor Co., Ltd. GENERAL.PRODUCT: RTL8821AE 802.11ac PCIe Wireless Network Adapter GENERAL.DRIVER: rtl8821ae GENERAL.DRIVER-VERSION: 4.4.0-75-generic GENERAL.FIRMWARE-VERSION: N/A GENERAL.HWADDR: <MAC 'wlp2s0' [IF3]> GENERAL.MTU: 1500 GENERAL.STATE: 100 (connected) GENERAL.REASON: 0 (No reason given) GENERAL.UDI: /sys/devices/pci0000:00/0000:00:1c.5/0000:02:00.0/net/wlp2s0 GENERAL.IP-IFACE: wlp2s0 GENERAL.IS-SOFTWARE: no GENERAL.NM-MANAGED: yes GENERAL.AUTOCONNECT: yes GENERAL.FIRMWARE-MISSING: no GENERAL.NM-PLUGIN-MISSING: no GENERAL.PHYS-PORT-ID:
-- GENERAL.CONNECTION: ROUND ABOUT GENERAL.CON-UUID: 0b9cd60a-1403-4e3f-88b2-05becd106bf0 GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/4 GENERAL.METERED: no (guessed) CAPABILITIES.CARRIER-DETECT: no CAPABILITIES.SPEED: 150 Mb/s CAPABILITIES.IS-SOFTWARE: no WIFI-PROPERTIES.WEP: yes WIFI-PROPERTIES.WPA: yes WIFI-PROPERTIES.WPA2: yes WIFI-PROPERTIES.TKIP: yes WIFI-PROPERTIES.CCMP: yes WIFI-PROPERTIES.AP: yes WIFI-PROPERTIES.ADHOC: yes WIFI-PROPERTIES.2GHZ: yes WIFI-PROPERTIES.5GHZ: yes CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{3} CONNECTIONS.AVAILABLE-CONNECTIONS[1]: 0b9cd60a-1403-4e3f-88b2-05becd106bf0 | ROUND ABOUT IP4.ADDRESS[1]:
192.168.1.51/24 IP4.GATEWAY: 192.168.1.1 IP4.DNS[1]: 203.144.206.29 IP4.DNS[2]:
203.144.206.49 DHCP4.OPTION[1]: requested_subnet_mask = 1 DHCP4.OPTION[2]: requested_rfc3442_classless_static_routes = 1 DHCP4.OPTION[3]: subnet_mask = 255.255.255.0 DHCP4.OPTION[4]: domain_name_servers = 203.144.206.29 203.144.206.49 DHCP4.OPTION[5]: ip_address = 192.168.1.51 DHCP4.OPTION[6]: requested_static_routes = 1 DHCP4.OPTION[7]: dhcp_server_identifier = 192.168.1.1 DHCP4.OPTION[8]: default_ip_ttl = 64 DHCP4.OPTION[9]: requested_time_offset = 1 DHCP4.OPTION[10]: time_offset = 0 DHCP4.OPTION[11]: broadcast_address = 192.168.1.255 DHCP4.OPTION[12]: requested_interface_mtu = 1 DHCP4.OPTION[13]: requested_domain_name_servers = 1 DHCP4.OPTION[14]: dhcp_rebinding_time = 75600 DHCP4.OPTION[15]: dhcp_message_type = 5 DHCP4.OPTION[16]: requested_broadcast_address = 1 DHCP4.OPTION[17]: routers = 192.168.1.1 DHCP4.OPTION[18]: dhcp_renewal_time = 43200 DHCP4.OPTION[19]: requested_domain_name = 1 DHCP4.OPTION[20]: requested_routers = 1 DHCP4.OPTION[21]: expiry = 1494309725 DHCP4.OPTION[22]: requested_wpad = 1 DHCP4.OPTION[23]: requested_netbios_scope = 1 DHCP4.OPTION[24]: requested_ms_classless_static_routes = 1 DHCP4.OPTION[25]: requested_netbios_name_servers = 1 DHCP4.OPTION[26]: network_number = 192.168.1.0 DHCP4.OPTION[27]: requested_domain_search = 1 DHCP4.OPTION[28]: requested_ntp_servers = 1 DHCP4.OPTION[29]: next_server = 192.168.1.1 DHCP4.OPTION[30]: requested_host_name = 1 DHCP4.OPTION[31]: dhcp_lease_time = 86400 IP6.ADDRESS[1]: fe80::5f5:68c6:8ccf:2c5c/64 IP6.GATEWAY:
GENERAL.DEVICE: enp1s0 GENERAL.TYPE: ethernet GENERAL.NM-TYPE: NMDeviceEthernet GENERAL.VENDOR: Realtek Semiconductor Co., Ltd. GENERAL.PRODUCT: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller GENERAL.DRIVER: r8169 GENERAL.DRIVER-VERSION: 2.3LK-NAPI GENERAL.FIRMWARE-VERSION: GENERAL.HWADDR: <MAC 'enp1s0' [IF2]> GENERAL.MTU: 1500 GENERAL.STATE: 20 (unavailable) GENERAL.REASON: 2 (Device is now managed) GENERAL.UDI: /sys/devices/pci0000:00/0000:00:1c.0/0000:01:00.0/net/enp1s0 GENERAL.IP-IFACE: GENERAL.IS-SOFTWARE: no GENERAL.NM-MANAGED: yes GENERAL.AUTOCONNECT: yes GENERAL.FIRMWARE-MISSING: no GENERAL.NM-PLUGIN-MISSING: no GENERAL.PHYS-PORT-ID:
-- GENERAL.CONNECTION: -- GENERAL.CON-UUID: -- GENERAL.CON-PATH: -- GENERAL.METERED: unknown CAPABILITIES.CARRIER-DETECT: yes CAPABILITIES.SPEED: unknown CAPABILITIES.IS-SOFTWARE: no WIRED-PROPERTIES.CARRIER: off CONNECTIONS.AVAILABLE-CONNECTION-PATHS:
SSID BSSID MODE CHAN FREQ RATE SIGNAL BARS SECURITY ACTIVE * RA Workspace <MAC 'RA Workspace' [AN1]> Infra 11 2462 MHz 54 Mbit/s 100 ▂▄▆█ WPA1 WPA2 no ROUND ABOUT 2 <MAC 'ROUND ABOUT 2' [AN2]> Infra 11 2462 MHz 54 Mbit/s 94 ▂▄▆█ WPA1 WPA2 no ASIA <MAC 'ASIA' [AN3]> Infra 2 2417 MHz 54 Mbit/s 80 ▂▄▆_ WPA2 no ROUND ABOUT <MAC 'ROUND ABOUT' [AN4]> Infra 161 5805 MHz 54 Mbit/s 76 ▂▄▆_ WPA1 WPA2 yes * SMART 4G 5.5 Enterprise <MAC 'SMART 4G
5.5 Enterprise' [AN5]> Infra 6 2437 MHz 54 Mbit/s 47 ▂▄__ WPA2 no KaKA-HOME <MAC 'KaKA-HOME' [AN6]> Infra 9 2452 MHz 54 Mbit/s 47 ▂▄__ WPA2 no Kem3bb <MAC 'Kem3bb' [AN7]> Infra 6 2437 MHz 54 Mbit/s 44 ▂▄__ WPA1 WPA2 no
##### NetworkManager.state ##############
[main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true
##### NetworkManager.conf ###############
[main] plugins=ifupdown,keyfile,ofono dns=dnsmasq
[ifupdown] managed=false
##### NetworkManager profiles ###########
[[/etc/NetworkManager/system-connections/Pineapple3]] (600 root) [connection] id=Pineapple3 | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=Pineapple3 [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/Anna's iPhone]] (600 root) [connection] id=Anna's iPhone | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=Anna's iPhone [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/Travellers Hostel and Cafe]] (600 root) [connection] id=Travellers Hostel and Cafe | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=Travellers Hostel and Cafe [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/9101809875 5G]] (600 root) [connection] id=9101809875 5G | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=9101809875 5G [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/Pineapple 4]] (600 root) [connection] id=Pineapple 4 | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=Pineapple 4 [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/unfashion]] (600 root) [connection] id=unfashion | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=unfashion [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/rockyrooster 2]] (600 root) [connection] id=rockyrooster 2 | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=rockyrooster 2 [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/CS-QR20]] (600 root) [connection] id=CS-QR20 | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=CS-QR20 [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/Steps2]] (600 root) [connection] id=Steps2 | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=Steps2 [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/thonglorartspace2014]] (600 root) [connection] id=thonglorartspace2014 | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=thonglorartspace2014 [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/rockyrooster 1]] (600 root) [connection] id=rockyrooster 1 | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=rockyrooster 1 [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/Darkwonder II]] (600 root) [connection] id=Darkwonder II | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=Darkwonder II [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/9101809875]] (600 root) [connection] id=9101809875 | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=9101809875 [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/the password is password]] (600 root) [connection] id=the password is password | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=the password is password [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/AP013904N002]] (600 root) [connection] id=AP013904N002 | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=AP013904N002 [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/ROUND ABOUT]] (600 root) [connection] id=ROUND ABOUT | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=ROUND ABOUT [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/Merkey Merkel's Sex Dungeon]] (600 root) [connection] id=Merkey Merkel's Sex Dungeon | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=Merkey Merkel's Sex Dungeon [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/Sabaijai]] (600 root) [connection] id=Sabaijai | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=Sabaijai [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/true_home2G_RmQ]] (600 root) [connection] id=true_home2G_RmQ | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=true_home2G_RmQ [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/Melange]] (600 root) [connection] id=Melange | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=Melange [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/Haleeva SunShine 1]] (600 root) [connection] id=Haleeva SunShine 1 | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=Haleeva SunShine 1 [ipv4] method=auto [ipv6] method=auto
[[/etc/NetworkManager/system-connections/the password is password 1]] (600 root) [connection] id=the password is password 1 | type=wifi | permissions=user:conor:; [wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=the password is password [ipv4] method=auto [ipv6] method=auto
##### iw reg get ########################
Region: Asia/Bangkok (based on set time zone)
country 00: DFS-UNSET (2402 - 2472 @ 40), (N/A, 20), (N/A) (2457 - 2482 @ 40), (N/A, 20), (N/A), NO-IR (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, NO-IR (5170 - 5250 @ 80), (N/A, 20), (N/A), NO-IR (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, NO-IR (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, NO-IR (5735 - 5835 @ 80), (N/A, 20), (N/A), NO-IR (57240 - 63720 @ 2160), (N/A, 0), (N/A)
##### iwlist scan #######################
lo Interface doesn't support scanning.
enp1s0 Interface doesn't support scanning.
docker0 Interface doesn't support scanning.
wlp2s0 Interface doesn't support scanning : Device or resource busy
##### module infos ######################
[rtl8821ae] filename: /lib/modules/4.4.0-75-generic/kernel/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/rtl8821ae.ko firmware: rtlwifi/rtl8821aefw.bin description: Realtek 8821ae
802.11ac PCI wireless license: GPL author: Realtek WlanFAE <[email protected]> srcversion: 0E3A4E69E52B6033CEE5893 depends: rtlwifi,rtl_pci,btcoexist,mac80211 intree: Y vermagic: 4.4.0-75-generic SMP mod_unload modversions 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 0) (bool) parm: fwlps:Set to 1 to use FW control power save (default 1) (bool) parm: msi:Set to 1 to use MSI interrupts mode (default 1) (bool) parm: debug:Set debug level (0-5) (default 0) (int) parm: disable_watchdog:Set to 1 to disable the watchdog (default 0) (bool) parm: int_clear:Set to 0 to disable interrupt clear before set (default 1) (bool)
[rtl_pci] filename: /lib/modules/4.4.0-75-generic/kernel/drivers/net/wireless/realtek/rtlwifi/rtl_pci.ko description: PCI basic driver for rtlwifi license: GPL author: Larry Finger <[email protected]> author: Realtek WlanFAE <[email protected]> author: lizhaoming <[email protected]> srcversion: 3B33A271D8BDBE9755FC279 depends: mac80211,rtlwifi intree: Y vermagic: 4.4.0-75-generic SMP mod_unload modversions
[rtlwifi] filename: /lib/modules/4.4.0-75-generic/kernel/drivers/net/wireless/realtek/rtlwifi/rtlwifi.ko description: Realtek 802.11n PCI wireless core license: GPL author: Larry Finger <[email protected]> author: Realtek WlanFAE <[email protected]> author: lizhaoming <[email protected]> srcversion: F5F46436A12E44A7B798C34 depends: mac80211,cfg80211 intree: Y vermagic: 4.4.0-75-generic SMP mod_unload modversions
[mac80211] filename: /lib/modules/4.4.0-75-generic/kernel/net/mac80211/mac80211.ko license: GPL description: IEEE 802.11 subsystem srcversion: 0EDE2F31518E91FFBB1E4EC depends: cfg80211 intree: Y vermagic: 4.4.0-75-generic SMP mod_unload modversions parm: minstrel_vht_only:Use only VHT rates when VHT is supported by sta. (bool) parm: max_nullfunc_tries:Maximum nullfunc tx tries before disconnecting (reason 4). (int) parm: max_probe_tries:Maximum probe tries before disconnecting (reason 4). (int) parm: beacon_loss_count:Number of beacon intervals before we decide beacon was lost. (int) parm: probe_wait_ms:Maximum time(ms) to wait for probe response before disconnecting (reason 4). (int) parm: ieee80211_default_rc_algo:Default rate control algorithm for mac80211 to use (charp)
[cfg80211] filename: /lib/modules/4.4.0-75-generic/kernel/net/wireless/cfg80211.ko description: wireless configuration support license: GPL author: Johannes Berg srcversion: 48C96882CCDC964173BE1D1 depends: intree: Y vermagic: 4.4.0-75-generic SMP mod_unload modversions parm: bss_entries_limit:limit to number of scan BSS entries (per wiphy, default 1000) (int) parm: ieee80211_regdom:IEEE 802.11 regulatory domain code (charp) parm: cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool)
##### module parameters #################
[rtl8821ae] debug: 0 disable_watchdog: N fwlps: N int_clear: Y ips: Y msi: Y swenc: Y swlps: N
[mac80211] beacon_loss_count: 7 ieee80211_default_rc_algo: minstrel_ht max_nullfunc_tries: 2 max_probe_tries: 5 minstrel_vht_only: Y probe_wait_ms: 500
[cfg80211] bss_entries_limit: 1000 cfg80211_disable_40mhz_24ghz: N ieee80211_regdom: 00
##### /etc/modules ######################
##### modprobe options ##################
[/etc/modprobe.d/blacklist-ath_pci.conf] blacklist ath_pci
[/etc/modprobe.d/blacklist.conf] blacklist evbug blacklist usbmouse blacklist usbkbd blacklist eepro100 blacklist de4x5 blacklist eth1394 blacklist snd_intel8x0m blacklist snd_aw2 blacklist i2c_i801 blacklist prism54 blacklist bcm43xx blacklist garmin_gps blacklist asus_acpi blacklist snd_pcsp blacklist pcspkr blacklist amd76x_edac
[/etc/modprobe.d/blacklist-rare-network.conf] alias net-pf-3 off alias net-pf-6 off alias net-pf-9 off alias net-pf-11 off alias net-pf-12 off alias net-pf-19 off alias net-pf-21 off alias net-pf-36 off
[/etc/modprobe.d/iwlwifi.conf] remove iwlwifi \ (/sbin/lsmod | grep -o
-e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \ && /sbin/modprobe -r mac80211
[/etc/modprobe.d/mlx4.conf] softdep mlx4_core post: mlx4_en
[/etc/modprobe.d/r8169.conf] options r8169 fwlps=N
[/etc/modprobe.d/rtl8821ae.conf] options rtl8821ae fwlps=N options rtl8821ae swenc=1
##### rc.local ##########################
exit 0
##### pm-utils ##########################
[/etc/pm/config.d/config] (644 root) service network-manager restart
[/etc/pm/sleep.d/10_resume_wifi] (755 root) case "${1}" in
resume|thaw) nmcli nm sleep false ;; esac
##### udev rules ########################
用这个PPA取代驱动程序对我有用（https://askubuntu.com/questions/796665/dropping-internet-connection-on-realtek-semiconductor-co-ltd-rtl8821ae/796669）。在终端中输入以下行：
sudo add-apt-repository ppa:hanipouspilot/rtlwifi
sudo apt update
sudo apt install rtlwifi-new-dkms
这是Linux发行版中常见的Realtek WiFi驱动程序问题。
git clone https://github.com/lwfinger/rtlwifi_new
cd rtlwifi_new
make
sudo make install
sudo modprobe -rv rtl8723be
sudo modprobe -v rtl8723be ant_sel=2
如果ant_sel=2没有增加WiFi范围，试试这个..
sudo modprobe -rv rtl8723be
sudo modprobe -v rtl8723be ant_sel=1
如果你想将ant_sel永久化：
echo "options rtl8723be ant_sel=X" | sudo tee /etc/modprobe.d/rtlbtcoex.conf
根据您的经验，X表示1或2
每次内核更新或更改后，您可能需要再次执行此步骤（跳过echo命令）以重新获得WiFi信号。