我最近决定尝试一下 Linux，我清空了硬盘并安装了 Ubuntu Mate 16.04。它会显示我有一个 wifi 连接，但无法加载互联网。我昨天早上关闭了 ipv6，互联网工作了一段时间，但现在又不工作了。没有硬禁用或软禁用，我检查了 rfkill 列表。我的所有其他设备都可以在 wifi 上运行，我已经无数次重启了电脑和路由器。有人知道问题出在哪里吗？
我正在运行联想 Ideapad 310。
########## wireless info START ##########
Report from: 15 Feb 2017 11:36 EST -0500
Booted last: 15 Feb 2017 00:00 EST -0500
Script from: 08 Jul 2016 02:16 UTC +0000
##### release ###########################
Distributor ID: Ubuntu
Description: Ubuntu 16.04.2 LTS
Release: 16.04
Codename: xenial
##### kernel ############################
Linux 4.4.0-62-generic #83-Ubuntu SMP Wed Jan 18 14:10:15 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, vt.handoff=7
##### desktop ###########################
MATE
##### 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 5986:06b2 Acer, Inc
Bus 001 Device 099: ID 1ebf:705b
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: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
3: hci0: Bluetooth
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
wmi 20480 1 ideapad_laptop
video 40960 3 i915_bpo,ideapad_laptop,thinkpad_acpi
##### interfaces ########################
auto lo
iface lo inet loopback
##### ifconfig ##########################
enp0s20f0u3 Link encap:Ethernet HWaddr <MAC 'enp0s20f0u3' [IF1]>
inet addr:192.168.42.43 Bcast:192.168.42.255 Mask:255.255.255.0
inet6 addr: fe80::13f1:5fba:271e:9658/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:33112 errors:0 dropped:0 overruns:0 frame:0
TX packets:26391 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:37280578 (37.2 MB) TX bytes:6624185 (6.6 MB)
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)
wlp2s0 Link encap:Ethernet HWaddr <MAC 'wlp2s0' [IF3]>
inet addr:192.168.1.17 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::<IP6 'wlp2s0' [IF3]>/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6125 errors:0 dropped:0 overruns:0 frame:0
TX packets:1994 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1143860 (1.1 MB) TX bytes:197425 (197.4 KB)
##### iwconfig ##########################
lo no wireless extensions.
enp1s0 no wireless extensions.
enp0s20f0u3 no wireless extensions.
wlp2s0 IEEE 802.11abgn ESSID:"serenity"
Mode:Managed Frequency:5.18 GHz Access Point: <MAC 'serenity' [AC1]>
Bit Rate=6 Mb/s Tx-Power=17 dBm
Retry short limit:7 RTS thr=2347 B Fragment thr:off
Power Management:off
Link Quality=70/70 Signal level=-39 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
##### route #############################
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.42.129 0.0.0.0 UG 100 0 0 enp0s20f0u3
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 wlp2s0
192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlp2s0
192.168.42.0 0.0.0.0 255.255.255.0 U 100 0 0 enp0s20f0u3
##### resolv.conf #######################
nameserver 127.0.1.1
search home
##### network managers ##################
Installed:
NetworkManager
Running:
root 962 1 0 10:14 ? 00:00:02 /usr/sbin/NetworkManager --no-daemon
##### NetworkManager info ###############
GENERAL.DEVICE: enp0s20f0u3
GENERAL.TYPE: ethernet
GENERAL.NM-TYPE: NMDeviceEthernet
GENERAL.VENDOR: Android
GENERAL.PRODUCT: Android
GENERAL.DRIVER: rndis_host
GENERAL.DRIVER-VERSION: 22-Aug-2005
GENERAL.FIRMWARE-VERSION: RNDIS device
GENERAL.HWADDR: <MAC 'enp0s20f0u3' [IF1]>
GENERAL.MTU: 1500
GENERAL.STATE: 100 (connected)
GENERAL.REASON: 0 (No reason given)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/net/enp0s20f0u3
GENERAL.IP-IFACE: enp0s20f0u3
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: Wired connection 1
GENERAL.CON-UUID: 09b71e9f-c5d1-356b-b10d-d6f53864caf3
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/5
GENERAL.METERED: yes (guessed)
CAPABILITIES.CARRIER-DETECT: yes
CAPABILITIES.SPEED: unknown
CAPABILITIES.IS-SOFTWARE: no
WIRED-PROPERTIES.CARRIER: on
CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{5}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]: 09b71e9f-c5d1-356b-b10d-d6f53864caf3 | Wired connection 1
IP4.ADDRESS[1]: 192.168.42.43/24
IP4.GATEWAY: 192.168.42.129
IP4.DNS[1]: 192.168.42.129
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 = 192.168.42.129
DHCP4.OPTION[5]: ip_address = 192.168.42.43
DHCP4.OPTION[6]: requested_static_routes = 1
DHCP4.OPTION[7]: dhcp_server_identifier = 192.168.42.129
DHCP4.OPTION[8]: requested_time_offset = 1
DHCP4.OPTION[9]: broadcast_address = 192.168.42.255
DHCP4.OPTION[10]: requested_interface_mtu = 1
DHCP4.OPTION[11]: dhcp_rebinding_time = 3150
DHCP4.OPTION[12]: requested_domain_name_servers = 1
DHCP4.OPTION[13]: dhcp_message_type = 5
DHCP4.OPTION[14]: requested_broadcast_address = 1
DHCP4.OPTION[15]: routers = 192.168.42.129
DHCP4.OPTION[16]: dhcp_renewal_time = 1800
DHCP4.OPTION[17]: requested_domain_name = 1
DHCP4.OPTION[18]: requested_routers = 1
DHCP4.OPTION[19]: expiry = 1487179710
DHCP4.OPTION[20]: requested_wpad = 1
DHCP4.OPTION[21]: host_name = lucifer-Lenovo-ideapad-310-15IKB
DHCP4.OPTION[22]: requested_netbios_scope = 1
DHCP4.OPTION[23]: requested_ms_classless_static_routes = 1
DHCP4.OPTION[24]: requested_netbios_name_servers = 1
DHCP4.OPTION[25]: network_number = 192.168.42.0
DHCP4.OPTION[26]: requested_domain_search = 1
DHCP4.OPTION[27]: vendor_encapsulated_options = ANDROID_METERED
DHCP4.OPTION[28]: next_server = 192.168.42.129
DHCP4.OPTION[29]: requested_host_name = 1
DHCP4.OPTION[30]: dhcp_lease_time = 3600
DHCP4.OPTION[31]: requested_ntp_servers = 1
IP6.ADDRESS[1]: fe80::13f1:5fba:271e:9658/64
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: 4.4.0-62-generic
GENERAL.FIRMWARE-VERSION: N/A
GENERAL.HWADDR: <MAC 'wlp2s0' [IF3]>
GENERAL.MTU: 0
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: serenity
GENERAL.CON-UUID: 9a10ee6c-33db-4467-9870-cc28dc9c67a7
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/0
GENERAL.METERED: no (guessed)
CAPABILITIES.CARRIER-DETECT: no
CAPABILITIES.SPEED: 6 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/{0}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]: 9a10ee6c-33db-4467-9870-cc28dc9c67a7 | serenity
IP4.ADDRESS[1]: 192.168.1.17/24
IP4.GATEWAY: 192.168.1.1
IP4.ROUTE[1]: dst = 169.254.0.0/16, nh = 0.0.0.0, mt = 1000
IP4.DNS[1]: 192.168.1.1
IP4.DOMAIN[1]: home
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 = 192.168.1.1
DHCP4.OPTION[5]: ip_address = 192.168.1.17
DHCP4.OPTION[6]: requested_static_routes = 1
DHCP4.OPTION[7]: dhcp_server_identifier = 192.168.1.1
DHCP4.OPTION[8]: requested_time_offset = 1
DHCP4.OPTION[9]: time_offset = 0
DHCP4.OPTION[10]: broadcast_address = 192.168.1.255
DHCP4.OPTION[11]: requested_interface_mtu = 1
DHCP4.OPTION[12]: requested_domain_name_servers = 1
DHCP4.OPTION[13]: dhcp_rebinding_time = 3150
DHCP4.OPTION[14]: dhcp_message_type = 5
DHCP4.OPTION[15]: requested_broadcast_address = 1
DHCP4.OPTION[16]: routers = 192.168.1.1
DHCP4.OPTION[17]: dhcp_renewal_time = 1800
DHCP4.OPTION[18]: requested_domain_name = 1
DHCP4.OPTION[19]: domain_name = home
DHCP4.OPTION[20]: requested_routers = 1
DHCP4.OPTION[21]: expiry = 1487179681
DHCP4.OPTION[22]: host_name = lucifer-Lenovo-ideapad-310-15IKB
DHCP4.OPTION[23]: requested_netbios_scope = 1
DHCP4.OPTION[24]: requested_wpad = 1
DHCP4.OPTION[25]: requested_ms_classless_static_routes = 1
DHCP4.OPTION[26]: requested_netbios_name_servers = 1
DHCP4.OPTION[27]: network_number = 192.168.1.0
DHCP4.OPTION[28]: requested_domain_search = 1
DHCP4.OPTION[29]: requested_ntp_servers = 1
DHCP4.OPTION[30]: ntp_servers = 192.168.1.1
DHCP4.OPTION[31]: dhcp_lease_time = 3600
DHCP4.OPTION[32]: requested_host_name = 1
DHCP4.OPTION[33]: next_server = 192.168.1.1
IP6.ADDRESS[1]: fe80::<IP6 'wlp2s0' [IF3]>/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 *
optimumwifi <MAC 'optimumwifi' [AC4]> Infra 1 2412 MHz 54 Mbit/s 100 ▂▄▆█ -- no
serenity <MAC 'serenity' [AC3]> Infra 1 2412 MHz 54 Mbit/s 100 ▂▄▆█ WPA1 WPA2 no
optimumwifi <MAC 'optimumwifi' [AC5]> Infra 36 5180 MHz 54 Mbit/s 97 ▂▄▆█ -- no
serenity <MAC 'serenity' [AC1]> Infra 36 5180 MHz 54 Mbit/s 81 ▂▄▆█ WPA1 WPA2 yes *
optimumwifi <MAC 'optimumwifi' [AN5]> Infra 6 2437 MHz 54 Mbit/s 47 ▂▄__ -- no
620480 <MAC '620480' [AN6]> Infra 6 2437 MHz 54 Mbit/s 47 ▂▄__ WPA1 WPA2 no
iHub_006035071645 <MAC 'iHub_006035071645' [AC7]> Infra 11 2462 MHz 54 Mbit/s 44 ▂▄__ WPA2 no
Tenda_2BEA10 <MAC 'Tenda_2BEA10' [AN8]> Infra 5 2432 MHz 54 Mbit/s 40 ▂▄__ WPA1 WPA2 no
optimumwifi <MAC 'optimumwifi' [AN9]> Infra 6 2437 MHz 54 Mbit/s 37 ▂▄__ -- 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/serenity]] (600 root)
[connection] id=serenity | type=wifi | permissions=
[wifi] mac-address=<MAC 'wlp2s0' [IF3]> | mac-address-blacklist= | ssid=serenity
[ipv4] method=auto
[ipv6] method=ignore
##### iw reg get ########################
Region: America/New_York (based on set time zone)
country US: DFS-FCC
(2402 - 2472 @ 40), (N/A, 30), (N/A)
(5170 - 5250 @ 80), (N/A, 17), (N/A)
(5250 - 5330 @ 80), (N/A, 23), (0 ms), DFS
(5490 - 5730 @ 160), (N/A, 23), (0 ms), DFS
(5735 - 5835 @ 80), (N/A, 30), (N/A)
(57240 - 63720 @ 2160), (N/A, 40), (N/A)
##### iwlist channels ###################
lo no frequency information.
enp1s0 no frequency information.
enp0s20f0u3 no frequency information.
wlp2s0 32 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 36 : 5.18 GHz
Channel 40 : 5.2 GHz
Channel 44 : 5.22 GHz
Channel 48 : 5.24 GHz
Channel 52 : 5.26 GHz
Channel 56 : 5.28 GHz
Channel 60 : 5.3 GHz
Channel 64 : 5.32 GHz
Channel 100 : 5.5 GHz
Channel 104 : 5.52 GHz
Channel 108 : 5.54 GHz
Channel 112 : 5.56 GHz
Channel 116 : 5.58 GHz
Channel 120 : 5.6 GHz
Channel 124 : 5.62 GHz
Channel 128 : 5.64 GHz
Channel 132 : 5.66 GHz
Channel 136 : 5.68 GHz
Channel 140 : 5.7 GHz
Channel 149 : 5.745 GHz
Channel 153 : 5.765 GHz
Current Frequency:5.18 GHz (Channel 36)
##### iwlist scan #######################
lo Interface doesn't support scanning.
enp1s0 Interface doesn't support scanning.
enp0s20f0u3 Interface doesn't support scanning.
Channel occupancy:
3 APs on Frequency:2.412 GHz (Channel 1)
1 APs on Frequency:2.437 GHz (Channel 6)
1 APs on Frequency:2.462 GHz (Channel 11)
2 APs on Frequency:5.18 GHz (Channel 36)