今天是个好日子，
从昨天开始，我的 wifi 连接就一直不稳定；这很奇怪，因为这一切都始于我尝试在 VLC 中转换视频（我不太清楚两者之间的关联，尽管当 vlc 最终无法完成转换并停止时，wifi 又恢复了工作）。所以它根本无法连接，然后有时会连接，wifi 也可以工作，有时它会停止工作但会保持连接。这肯定不是我的路由器的问题，因为其他所有计算机和设备都运行正常。此外，如果我使用 Windows 启动，也会发生同样的事情（我将硬盘分成两部分，一部分是 ubuntu 16.04，另一部分是 windows 10）。
我猜可能是我的 wifi 卡出了问题？它正在缓慢但肯定地停止履行其职责？你们觉得呢？这里有一堆您可能需要了解问题的信息（抱歉，我只是不知道……），另一个主题建议放上去。（我的无线/WiFi 连接无法使用。诊断问题需要哪些信息？）抱歉，如果这里有点乱，我会把它全部放上去……提前谢谢大家！
（由于字符数原因，我删减了一些信息，但遗漏了）
########## wireless info START ##########
01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 10)
Subsystem: Acer Incorporated [ALI] RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [1025:089d]
Kernel driver in use: r8169
02:00.0 Network controller [0280]: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter [168c:0036] (rev 01)
Subsystem: Foxconn International, Inc. QCA9565 / AR9565 Wireless Network Adapter [105b:e07f]
Kernel driver in use: ath9k
##### rfkill ############################
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
1: hci0: Bluetooth
Soft blocked: yes
Hard blocked: no
2: acer-wireless: Wireless LAN
Soft blocked: no
Hard blocked: no
3: acer-bluetooth: Bluetooth
Soft blocked: yes
Hard blocked: no
##### lsmod #############################
acer_wmi 20480 0
ath3k 20480 0
bluetooth 520192 30 bnep,ath3k,btbcm,btrtl,btusb,rfcomm,btintel
ath9k 147456 0
ath9k_common 36864 1 ath9k
ath9k_hw 466944 2 ath9k_common,ath9k
ath 32768 3 ath9k_common,ath9k,ath9k_hw
mac80211 737280 1 ath9k
snd_soc_rt5640 114688 0
snd_soc_rl6231 16384 1 snd_soc_rt5640
cfg80211 565248 4 ath,ath9k_common,ath9k,mac80211
snd_soc_core 212992 2 snd_soc_rt5640,snd_soc_sst_mfld_platform
snd_pcm 106496 8 snd_soc_rt5640,snd_soc_core,snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_soc_sst_mfld_platform,snd_pcm_dmaengine,snd_hda_core
sparse_keymap 16384 2 acer_wmi,intel_vbtn
wmi 20480 1 acer_wmi
video 40960 2 i915,acer_wmi
##### interfaces ########################
auto lo
iface lo inet loopback
##### ifconfig ##########################
enp1s0 Link encap:Ethernet HWaddr <MAC 'enp1s0' [IF1]>
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:2126 errors:0 dropped:0 overruns:0 frame:0
TX packets:2148 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1473055 (1.4 MB) TX bytes:439312 (439.3 KB)
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:1688 errors:0 dropped:0 overruns:0 frame:0
TX packets:1688 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:126982 (126.9 KB) TX bytes:126982 (126.9 KB)
wlp2s0 Link encap:Ethernet HWaddr <MAC 'wlp2s0' [IF2]>
inet addr:192.168.0.43 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::5624:eca2:b7ef:97ac/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2408 errors:0 dropped:0 overruns:0 frame:0
TX packets:2393 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1269099 (1.2 MB) TX bytes:536039 (536.0 KB)
##### iwconfig ##########################
lo no wireless extensions.
enp1s0 no wireless extensions.
wlp2s0 IEEE 802.11bgn ESSID:"freebro"
Mode:Managed Frequency:2.462 GHz Access Point: <MAC 'freebro' [AC1]>
Bit Rate=36 Mb/s Tx-Power=15 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=58/70 Signal level=-52 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:249 Invalid misc:135 Missed beacon:0
##### route #############################
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.0.254 0.0.0.0 UG 600 0 0 wlp2s0
192.168.0.0 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 861 1 0 10:00 ? 00:00:00 /usr/sbin/NetworkManager --no-daemon
##### NetworkManager info ###############
GENERAL.DEVICE: wlp2s0
GENERAL.TYPE: wifi
GENERAL.NM-TYPE: NMDeviceWifi
GENERAL.VENDOR: Qualcomm Atheros
GENERAL.PRODUCT: QCA9565 / AR9565 Wireless Network Adapter
GENERAL.DRIVER: ath9k
GENERAL.DRIVER-VERSION: 4.4.0-83-generic
GENERAL.FIRMWARE-VERSION: N/A
GENERAL.HWADDR: <MAC 'wlp2s0' [IF2]>
GENERAL.MTU: 0
GENERAL.STATE: 100 (connected)
GENERAL.REASON: 0 (No reason given)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:1c.1/0000:02:00.0/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: freebro
GENERAL.CON-UUID: 68fb7de9-fbbe-498f-a78a-970aca509dff
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/5
GENERAL.METERED: no (guessed)
CAPABILITIES.CARRIER-DETECT: no
CAPABILITIES.SPEED: 36 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: no
CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{0,3}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]: fd98afa1-6291-4ba6-9c42-34535a4aa6cc | freebro_EXT
CONNECTIONS.AVAILABLE-CONNECTIONS[2]: 68fb7de9-fbbe-498f-a78a-970aca509dff | freebro
IP4.ADDRESS[1]: 192.168.0.43/24
IP4.GATEWAY: 192.168.0.254
IP4.DNS[1]: 192.168.0.254
DHCP4.OPTION[1]: requested_routers = 1
DHCP4.OPTION[2]: requested_domain_search = 1
DHCP4.OPTION[3]: requested_time_offset = 1
DHCP4.OPTION[4]: requested_domain_name = 1
DHCP4.OPTION[5]: requested_rfc3442_classless_static_routes = 1
DHCP4.OPTION[6]: requested_broadcast_address = 1
DHCP4.OPTION[7]: requested_netbios_scope = 1
DHCP4.OPTION[8]: requested_wpad = 1
DHCP4.OPTION[9]: next_server = 0.0.0.0
DHCP4.OPTION[10]: expiry = 1499717079
DHCP4.OPTION[11]: requested_interface_mtu = 1
DHCP4.OPTION[12]: requested_subnet_mask = 1
DHCP4.OPTION[13]: routers = 192.168.0.254
DHCP4.OPTION[14]: dhcp_message_type = 5
DHCP4.OPTION[15]: ip_address = 192.168.0.43
DHCP4.OPTION[16]: broadcast_address = 192.168.0.255
DHCP4.OPTION[17]: requested_static_routes = 1
DHCP4.OPTION[18]: requested_domain_name_servers = 1
DHCP4.OPTION[19]: requested_ntp_servers = 1
DHCP4.OPTION[20]: requested_netbios_name_servers = 1
DHCP4.OPTION[21]: dhcp_lease_time = 43200
DHCP4.OPTION[22]: domain_name_servers = 192.168.0.254
DHCP4.OPTION[23]: requested_ms_classless_static_routes = 1
DHCP4.OPTION[24]: subnet_mask = 255.255.255.0
DHCP4.OPTION[25]: network_number = 192.168.0.0
DHCP4.OPTION[26]: requested_host_name = 1
DHCP4.OPTION[27]: dhcp_server_identifier = 192.168.0.254
IP6.ADDRESS[1]: fe80::5624:eca2:b7ef:97ac/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' [IF1]>
GENERAL.MTU: 1500
GENERAL.STATE: 20 (unavailable)
GENERAL.REASON: 40 (Carrier/link changed)
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: 1000 Mb/s
CAPABILITIES.IS-SOFTWARE: no
WIRED-PROPERTIES.CARRIER: off
CONNECTIONS.AVAILABLE-CONNECTION-PATHS:
SSID BSSID MODE CHAN FREQ RATE SIGNAL BARS SECURITY ACTIVE *
freebro_EXT <MAC 'freebro_EXT' [AC6]> Infra 11 2462 MHz 54 Mbit/s 100 ▂▄▆█ WEP no
FreeWifi <MAC 'FreeWifi' [AC5]> Infra 11 2462 MHz 54 Mbit/s 80 ▂▄▆_ -- no
FreeWifi_secure <MAC 'FreeWifi_secure' [AC4]> Infra 11 2462 MHz 54 Mbit/s 80 ▂▄▆_ WPA2 802.1X no
freebro <MAC 'freebro' [AC1]> Infra 11 2462 MHz 54 Mbit/s 70 ▂▄▆_ WEP yes *
SFR_2D90 <MAC 'SFR_2D90' [AN5]> Infra 6 2437 MHz 54 Mbit/s 12 ▂___ WPA1 no
FreeWifi_secure <MAC 'FreeWifi_secure' [AN6]> Infra 1 2412 MHz 54 Mbit/s 9 ▂___ WPA2 802.1X no
Freebox-0A4899 <MAC 'Freebox-0A4899' [AC2]> Infra 1 2412 MHz 54 Mbit/s 5 ____ 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/freebro_EXT]] (600 root)
[connection] id=freebro_EXT | type=wifi | permissions=user:elkevn:;
[wifi] mac-address=<MAC 'wlp2s0' [IF2]> | mac-address-blacklist= | ssid=freebro_EXT
[ipv4] method=auto
[ipv6] method=auto
[[/etc/NetworkManager/system-connections/Unice-HotSpot]] (600 root)
[connection] id=Unice-HotSpot | type=wifi | permissions=user:elkevn:;
[wifi] mac-address=<MAC 'wlp2s0' [IF2]> | mac-address-blacklist= | ssid=Unice-HotSpot
[ipv4] method=auto
[ipv6] method=auto
[[/etc/NetworkManager/system-connections/freebro]] (600 root)
[connection] id=freebro | type=wifi | permissions=user:elkevn:;
[wifi] mac-address=<MAC 'wlp2s0' [IF2]> | mac-address-blacklist= | ssid=freebro
[ipv4] method=auto
[ipv6] method=auto
[[/etc/NetworkManager/system-connections/Bbox-3178B9A3]] (600 root)
[connection] id=Bbox-3178B9A3 | type=wifi | permissions=user:elkevn:;
[wifi] mac-address=<MAC 'wlp2s0' [IF2]> | mac-address-blacklist= | ssid=Bbox-3178B9A3
[ipv4] method=auto
[ipv6] method=auto
##### iw reg get ########################
Region: Europe/Paris (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 channels ###################
lo no frequency information.
enp1s0 no frequency information.
wlp2s0 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
Current Frequency:2.462 GHz (Channel 11)
##### iwlist scan #######################
lo Interface doesn't support scanning.
enp1s0 Interface doesn't support scanning.
Channel occupancy:
2 APs on Frequency:2.412 GHz (Channel 1)
4 APs on Frequency:2.462 GHz (Channel 11)
wlp2s0 Scan completed :
Cell 01 - Address: <MAC 'freebro' [AC1]>
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=57/70 Signal level=-53 dBm
Encryption key:on
ESSID:"freebro"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 22 Mb/s
6 Mb/s; 9 Mb/s; 12 Mb/s
Bit Rates:18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=0000000cf8433cd1
Extra: Last beacon: 168ms ago
Cell 02 - Address: <MAC 'Freebox-0A4899' [AC2]>
Channel:1
Frequency:2.412 GHz (Channel 1)
Quality=21/70 Signal level=-89 dBm
Encryption key:on
ESSID:"Freebox-0A4899"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 22 Mb/s
6 Mb/s; 9 Mb/s; 12 Mb/s
Bit Rates:18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=00000738ee15815f
Extra: Last beacon: 4664ms ago
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
Cell 03 - Address: <MAC 'FreeWifi' [AC3]>
Channel:1
Frequency:2.412 GHz (Channel 1)
Quality=16/70 Signal level=-94 dBm
Encryption key:off
ESSID:"FreeWifi"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 22 Mb/s
6 Mb/s; 9 Mb/s; 12 Mb/s
Bit Rates:18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=00000738ee15816e
Extra: Last beacon: 4632ms ago
Cell 04 - Address: <MAC 'FreeWifi_secure' [AC4]>
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=58/70 Signal level=-52 dBm
Encryption key:on
ESSID:"FreeWifi_secure"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 22 Mb/s
6 Mb/s; 9 Mb/s; 12 Mb/s
Bit Rates:18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=0000000cf85f8160
Extra: Last beacon: 200ms ago
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : 802.1x
Cell 05 - Address: <MAC 'FreeWifi' [AC5]>
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=58/70 Signal level=-52 dBm
Encryption key:off
ESSID:"FreeWifi"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 22 Mb/s
6 Mb/s; 9 Mb/s; 12 Mb/s
Bit Rates:18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=0000000cf842ca48
Extra: Last beacon: 136ms ago
Cell 06 - Address: <MAC 'freebro_EXT' [AC6]>
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=70/70 Signal level=-40 dBm
Encryption key:on
ESSID:"freebro_EXT"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
18 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=0000000cf775416d
Extra: Last beacon: 160ms ago
last dmesg entries:
[ 6214.062879] wlp2s0: authenticate with 14:0c:76:ed:11:00
[ 6214.086700] wlp2s0: send auth to 14:0c:76:ed:11:00 (try 1/3)
[ 6214.926271] wlp2s0: send auth to 14:0c:76:ed:11:00 (try 2/3)
[ 6215.092807] wlp2s0: send auth to 14:0c:76:ed:11:00 (try 3/3)
[ 6215.927435] wlp2s0: authentication with 14:0c:76:ed:11:00 timed out
[ 6219.936067] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
[ 6227.715697] wlp2s0: authenticate with 14:0c:76:ed:11:00
[ 6227.733016] wlp2s0: send auth to 14:0c:76:ed:11:00 (try 1/3)
[ 6228.738444] wlp2s0: send auth to 14:0c:76:ed:11:00 (try 2/3)
[ 6229.744001] wlp2s0: send auth to 14:0c:76:ed:11:00 (try 3/3)
[ 6230.749314] wlp2s0: authentication with 14:0c:76:ed:11:00 timed out
[ 6241.637586] wlp2s0: authenticate with 14:0c:76:ed:11:00
[ 6241.656315] wlp2s0: send auth to 14:0c:76:ed:11:00 (try 1/3)
[ 6242.660385] wlp2s0: send auth to 14:0c:76:ed:11:00 (try 2/3)
[ 6243.665963] wlp2s0: send auth to 14:0c:76:ed:11:00 (try 3/3)
[ 6244.671956] wlp2s0: authentication with 14:0c:76:ed:11:00 timed out
[ 6245.174425] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
答案1
所以我找到了解决问题的方法，在这种情况下，它实际上与 wifi 路由器有关。它使用 WEP 加密密钥进行广播，这已经过时了。此外，当我输入命令时
nmcli dev wifi
在“安全”栏中，结果显示“WPA1 WPA2”。解决办法是在路由器设置中更改该设置。
我做的另一件事（我并不完全确定这是否有用）是禁用 BIOS 中的安全启动（启动计算机时按 F2）。虽然我的是灰色的，但只要为 BIOS 设置管理员密码就可以修改它。
我希望这能对以后的某人有所帮助！保重