我一直在查看不同的帖子，想要弄清楚为什么 Wifi 这么慢，但无济于事。
我前天刚刚安装了 Ubuntu 16.04，并且与 Windows 10 进行了双启动。Windows 10 的速度正常，但当我尝试通过 Ubuntu 登录时，速度无法超过 40/50 KB。我在下面附上了 Wireless-info 脚本输出，并很乐意提供任何其他必要的信息。谢谢。
########## wireless info START ##########
Report from: 25 May 2017 23:31 AST +0300
Booted last: 25 May 2017 00:00 AST +0300
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 4.8.0-53-generic #56~16.04.1-Ubuntu SMP Tue May 16 01:18:56 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, nomodeset, vt.handoff=7
##### desktop ###########################
Ubuntu
##### lspci #############################
03:00.0 Ethernet controller [0200]: Qualcomm Atheros Killer E220x Gigabit Ethernet Controller [1969:e091] (rev 13)
Subsystem: Micro-Star International Co., Ltd. [MSI] Killer E220x Gigabit Ethernet Controller [1462:7917]
Kernel driver in use: alx
##### lsusb #############################
Bus 002 Device 002: ID 8087:8001 Intel Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:8009 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 002: ID 0781:5590 SanDisk Corp.
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 003: ID 0bda:8178 Realtek Semiconductor Corp. RTL8192CU 802.11n WLAN Adapter
Bus 003 Device 002: ID 045e:07b2 Microsoft Corp.
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
##### PCMCIA card info ##################
##### rfkill ############################
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
##### lsmod #############################
rtl8xxxu 122880 0
rtl8192cu 65536 0
rtl_usb 20480 1 rtl8192cu
rtl8192c_common 53248 1 rtl8192cu
rtlwifi 77824 3 rtl_usb,rtl8192c_common,rtl8192cu
mac80211 761856 4 rtl_usb,rtlwifi,rtl8192cu,rtl8xxxu
cfg80211 581632 2 mac80211,rtlwifi
mxm_wmi 16384 0
wmi 16384 1 mxm_wmi
##### interfaces ########################
auto lo
iface lo inet loopback
##### ifconfig ##########################
enp3s0 Link encap:Ethernet HWaddr <MAC 'enp3s0' [IF1]>
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)
Interrupt:19
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:765 errors:0 dropped:0 overruns:0 frame:0
TX packets:765 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:69035 (69.0 KB) TX bytes:69035 (69.0 KB)
wlx<IF from MAC [IF2]> Link encap:Ethernet HWaddr <MAC 'wlx<IF from MAC [IF2]>' [IF2]>
inet addr:192.168.100.5 Bcast:192.168.100.255 Mask:255.255.255.0
inet6 addr: fe80::b02d:a1db:4f5f:7d19/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:10158 errors:0 dropped:0 overruns:0 frame:0
TX packets:12307 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:8742023 (8.7 MB) TX bytes:4492794 (4.4 MB)
##### iwconfig ##########################
enp3s0 no wireless extensions.
lo no wireless extensions.
wlx<IF from MAC [IF2]> IEEE 802.11 ESSID:"Private"
Mode:Managed Frequency:2.462 GHz Access Point: <MAC 'Private' [AC1]>
Bit Rate=72.2 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thr:off
Power Management:off
Link Quality=36/70 Signal level=-74 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:198 Missed beacon:0
##### route #############################
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.100.1 0.0.0.0 UG 600 0 0 wlx<IF from MAC [IF2]>
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlx<IF from MAC [IF2]>
192.168.100.0 0.0.0.0 255.255.255.0 U 600 0 0 wlx<IF from MAC [IF2]>
##### resolv.conf #######################
nameserver 127.0.1.1
##### network managers ##################
Installed:
NetworkManager
Running:
root 843 1 0 23:24 ? 00:00:00 /usr/sbin/NetworkManager --no-daemon
##### NetworkManager info ###############
GENERAL.DEVICE: wlx<IF from MAC [IF2]>
GENERAL.TYPE: wifi
GENERAL.NM-TYPE: NMDeviceWifi
GENERAL.VENDOR: 802.11n
GENERAL.PRODUCT: USB WLAN
GENERAL.DRIVER: rtl8192cu
GENERAL.DRIVER-VERSION: 4.8.0-53-generic
GENERAL.FIRMWARE-VERSION: N/A
GENERAL.HWADDR: <MAC 'wlx<IF from MAC [IF2]>' [IF2]>
GENERAL.MTU: 0
GENERAL.STATE: 100 (connected)
GENERAL.REASON: 0 (No reason given)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5:1.0/net/wlx<IF from MAC [IF2]>
GENERAL.IP-IFACE: wlx<IF from MAC [IF2]>
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: Private
GENERAL.CON-UUID: bc8a390c-7044-4d03-9b44-0fdd4fcd9cb3
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/0
GENERAL.METERED: no (guessed)
CAPABILITIES.CARRIER-DETECT: no
CAPABILITIES.SPEED: 72 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/{1}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]: bc8a390c-7044-4d03-9b44-0fdd4fcd9cb3 | Private
IP4.ADDRESS[1]: 192.168.100.5/24
IP4.GATEWAY: 192.168.100.1
IP4.ROUTE[1]: dst = 169.254.0.0/16, nh = 0.0.0.0, mt = 1000
IP4.DNS[1]: 192.168.100.1
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 = 1496003050
DHCP4.OPTION[11]: requested_interface_mtu = 1
DHCP4.OPTION[12]: requested_subnet_mask = 1
DHCP4.OPTION[13]: dhcp_lease_time = 259200
DHCP4.OPTION[14]: dhcp_message_type = 5
DHCP4.OPTION[15]: ip_address = 192.168.100.5
DHCP4.OPTION[16]: requested_static_routes = 1
DHCP4.OPTION[17]: requested_domain_name_servers = 1
DHCP4.OPTION[18]: routers = 192.168.100.1
DHCP4.OPTION[19]: broadcast_address = 192.168.100.255
DHCP4.OPTION[20]: requested_ntp_servers = 1
DHCP4.OPTION[21]: requested_netbios_name_servers = 1
DHCP4.OPTION[22]: domain_name_servers = 192.168.100.1
DHCP4.OPTION[23]: requested_ms_classless_static_routes = 1
DHCP4.OPTION[24]: subnet_mask = 255.255.255.0
DHCP4.OPTION[25]: network_number = 192.168.100.0
DHCP4.OPTION[26]: requested_host_name = 1
DHCP4.OPTION[27]: dhcp_server_identifier = 192.168.100.1
IP6.ADDRESS[1]: fe80::b02d:a1db:4f5f:7d19/64
IP6.GATEWAY: fe80::1
IP6.DNS[1]: fe80::1
GENERAL.DEVICE: enp3s0
GENERAL.TYPE: ethernet
GENERAL.NM-TYPE: NMDeviceEthernet
GENERAL.VENDOR: Qualcomm Atheros
GENERAL.PRODUCT: Killer E220x Gigabit Ethernet Controller
GENERAL.DRIVER: alx
GENERAL.DRIVER-VERSION:
GENERAL.FIRMWARE-VERSION:
GENERAL.HWADDR: <MAC 'enp3s0' [IF1]>
GENERAL.MTU: 1500
GENERAL.STATE: 20 (unavailable)
GENERAL.REASON: 2 (Device is now managed)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:1c.3/0000:03:00.0/net/enp3s0
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 *
Private <MAC 'Private' [AC1]> Infra 11 2462 MHz 54 Mbit/s 46 â–‚â–„__ WPA1 WPA2 yes *
##### 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/Gujjar]] (600 root)
[connection] id=Gujjar | type=wifi | permissions=user:ahsan:;
[wifi] mac-address=<MAC 'wlx<IF from MAC [IF2]>' [IF2]> | mac-address-blacklist= | ssid=Gujjar
[ipv4] method=auto
[ipv6] method=auto
[[/etc/NetworkManager/system-connections/Private]] (600 root)
[connection] id=Private | type=wifi | permissions=
[wifi] mac-address=<MAC 'wlx<IF from MAC [IF2]>' [IF2]> | mac-address-blacklist= | ssid=Private
[ipv4] method=auto
[ipv6] method=auto
##### iw reg get ########################
Region: Asia/Riyadh (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 ###################
enp3s0 no frequency information.
lo no frequency information.
wlx<IF from MAC [IF2]> 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 #######################
enp3s0 Interface doesn't support scanning.
lo Interface doesn't support scanning.
Channel occupancy:
1 APs on Frequency:2.432 GHz (Channel 5)
1 APs on Frequency:2.462 GHz (Channel 11)
wlx<IF from MAC [IF2]> Scan completed :
Cell 01 - Address: <MAC 'Private' [AC1]>
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=12/70 Signal level=-98 dBm
Encryption key:on
ESSID:"Private"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
24 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=00000007be187ebb
Extra: Last beacon: 64ms ago
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
Cell 02 - Address: <MAC 'Gujjar' [AC2]>
Channel:5
Frequency:2.432 GHz (Channel 5)
Quality=36/70 Signal level=-74 dBm
Encryption key:on
ESSID:"Gujjar"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
24 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=0000002a8d936184
Extra: Last beacon: 2348ms ago
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
##### module infos ######################
[rtl8xxxu]
filename: /lib/modules/4.8.0-53-generic/kernel/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.ko
firmware: rtlwifi/rtl8723bu_bt.bin
firmware: rtlwifi/rtl8723bu_nic.bin
firmware: rtlwifi/rtl8192eu_nic.bin
firmware: rtlwifi/rtl8192cufw_TMSC.bin
firmware: rtlwifi/rtl8192cufw_B.bin
firmware: rtlwifi/rtl8192cufw_A.bin
firmware: rtlwifi/rtl8723aufw_B_NoBT.bin
firmware: rtlwifi/rtl8723aufw_B.bin
firmware: rtlwifi/rtl8723aufw_A.bin
license: GPL
description: RTL8XXXu USB mac80211 Wireless LAN Driver
author: Jes Sorensen <[email protected]>
srcversion: 59F02B6CF781E1985E0D1CE
depends: mac80211
intree: Y
vermagic: 4.8.0-53-generic SMP mod_unload modversions
parm: debug:Set debug mask (int)
parm: ht40_2g:Enable HT40 support on the 2.4GHz band (bool)
parm: dma_aggregation:Enable DMA packet aggregation (bool)
parm: dma_agg_timeout:Set DMA aggregation timeout (range 1-127) (int)
parm: dma_agg_pages:Set DMA aggregation pages (range 1-127, 0 to disable) (int)
[rtl8192cu]
filename: /lib/modules/4.8.0-53-generic/kernel/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/rtl8192cu.ko
firmware: rtlwifi/rtl8192cufw_TMSC.bin
firmware: rtlwifi/rtl8192cufw_B.bin
firmware: rtlwifi/rtl8192cufw_A.bin
firmware: rtlwifi/rtl8192cufw.bin
description: Realtek 8192C/8188C 802.11n USB wireless
license: GPL
author: Larry Finger <[email protected]>
author: Ziv Huang <[email protected]>
author: Georgia <[email protected]>
srcversion: 7FD327046ED7ECB8EE1DA58
depends: mac80211,rtlwifi,rtl8192c-common,rtl_usb
intree: Y
vermagic: 4.8.0-53-generic SMP mod_unload modversions
parm: swenc:Set to 1 for software crypto (default 0)
(bool)
parm: debug:Set debug level (0-5) (default 0) (int)
[rtl_usb]
filename: /lib/modules/4.8.0-53-generic/kernel/drivers/net/wireless/realtek/rtlwifi/rtl_usb.ko
description: USB basic driver for rtlwifi
license: GPL
author: Larry Finger <[email protected]>
author: Realtek WlanFAE <[email protected]>
author: lizhaoming <[email protected]>
srcversion: 1CECA7FEE652ED4ABDA8A2B
depends: mac80211,rtlwifi
intree: Y
vermagic: 4.8.0-53-generic SMP mod_unload modversions
[rtl8192c_common]
filename: /lib/modules/4.8.0-53-generic/kernel/drivers/net/wireless/realtek/rtlwifi/rtl8192c/rtl8192c-common.ko
description: Realtek 8192C/8188C 802.11n PCI wireless
license: GPL
author: Larry Finger <[email protected]>
author: Ziv Huang <[email protected]>
author: Georgia <[email protected]>
author: Realtek WlanFAE <[email protected]>
author: lizhaoming <[email protected]>
srcversion: FF42529D1B19DDAF0323975
depends: rtlwifi
intree: Y
vermagic: 4.8.0-53-generic SMP mod_unload modversions
[rtlwifi]
filename: /lib/modules/4.8.0-53-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: B936ED0E7D6B2CC6861A1AE
depends: mac80211,cfg80211
intree: Y
vermagic: 4.8.0-53-generic SMP mod_unload modversions
[mac80211]
filename: /lib/modules/4.8.0-53-generic/kernel/net/mac80211/mac80211.ko
license: GPL
description: IEEE 802.11 subsystem
srcversion: 9AF49B72127065FCF655D6A
depends: cfg80211
intree: Y
vermagic: 4.8.0-53-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/4.8.0-53-generic/kernel/net/wireless/cfg80211.ko
description: wireless configuration support
license: GPL
author: Johannes Berg
srcversion: 46F63B461AA5E38D042F531
depends:
intree: Y
vermagic: 4.8.0-53-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 #################
grep: /sys/module/rtl8xxxu/parameters/debug: Permission denied
grep: /sys/module/rtl8xxxu/parameters/dma_agg_pages: Permission denied
grep: /sys/module/rtl8xxxu/parameters/dma_aggregation: Permission denied
grep: /sys/module/rtl8xxxu/parameters/dma_agg_timeout: Permission denied
grep: /sys/module/rtl8xxxu/parameters/ht40_2g: Permission denied
[rtl8xxxu]
[rtl8192cu]
debug: 0
swenc: 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/E220x.conf]
options E220x fwlps=N
[/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
##### rc.local ##########################
exit 0
##### pm-utils ##########################
[/etc/pm/config.d/config] (644 root)
SUSPEND_MODULES="E220x"
##### udev rules ########################
##### dmesg #############################
[ 1.690728] systemd[1]: Started Trigger resolvconf update for networkd DNS.
[ 2.988671] IPv6: ADDRCONF(NETDEV_UP): enp3s0: link is not ready (repeated 2 times)
[ 3.041559] rtl8192cu: Chip version 0x11
[ 3.070166] rtl8192cu: Board Type 0
[ 3.070241] rtl_usb: rx_max_size 15360, rx_urb_num 8, in_ep 1
[ 3.070266] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin
[ 3.072982] ieee80211 phy0: Selected rate control algorithm 'rtl_rc'
[ 3.077602] rtl8192cu 3-5:1.0 wlx<IF from MAC [IF2]>: renamed from wlan0
[ 3.219538] IPv6: ADDRCONF(NETDEV_UP): wlx<IF from MAC [IF2]>: link is not ready
[ 3.222094] rtl8192cu: MAC auto ON okay!
[ 3.233655] rtl8192cu: Tx queue select: 0x05
[ 3.626362] IPv6: ADDRCONF(NETDEV_UP): wlx<IF from MAC [IF2]>: link is not ready (repeated 2 times)
[ 5.555691] wlx<IF from MAC [IF2]>: authenticate with <MAC 'Private' [AC1]>
[ 5.576702] wlx<IF from MAC [IF2]>: send auth to <MAC 'Private' [AC1]> (try 1/3)
[ 5.581829] wlx<IF from MAC [IF2]>: authenticated
[ 5.583350] wlx<IF from MAC [IF2]>: associate with <MAC 'Private' [AC1]> (try 1/3)
[ 5.622632] wlx<IF from MAC [IF2]>: RX AssocResp from <MAC 'Private' [AC1]> (capab=0x1411 status=0 aid=1)
[ 5.722781] wlx<IF from MAC [IF2]>: associated
[ 5.722788] IPv6: ADDRCONF(NETDEV_CHANGE): wlx<IF from MAC [IF2]>: link becomes ready
[ 5.722851] wlx<IF from MAC [IF2]>: Limiting TX power to 30 (30 - 0) dBm as advertised by <MAC 'Private' [AC1]>
########## wireless info END ############
答案1
您加载了两个可能存在冲突的驱动程序。让我们将其中一个列入黑名单，看看是否有帮助。从终端：
sudo -i
echo "blacklist rtl8192cu" >> /etc/modprobe.d/blacklist.conf
modprobe -r rtl8192cu
exit
有改善吗？可能需要重启。
现在，检查路由器中的设置。首选 WPA2-AES；而不是任何 WPA 和 WPA2 混合模式，当然不是TKIP。其次，如果您的路由器支持 N 速度，那么使用 2.4 GHz 频段的 20 MHz 信道宽度（而不是自动 20/40 MHz）可能会获得更好的连接性，尽管这可能会影响 N 速度。使用固定信道（1、6 或 11）比自动信道选择更能带来好运。此外，请确保路由器未设置为仅使用 N 速度；自动 B、G 和 N 是首选。进行这些更改后，重新启动路由器。
接下来，我建议明确设置你的监管范围。检查你的：
sudo iw reg get
如果您选择 00，则这是一个通用的设置。请在此处查找您的设置：http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2然后暂时设置一下：
sudo iw reg set IS
当然，如果不是冰岛，请替换您的国家代码。永久设置它：
gksudo gedit /etc/default/crda
如果您没有文本编辑器 gedit，请使用 nano 或 Kate 或 leafpad。
将最后一行改为：
REGDOMAIN=IS
仔细校对，保存并关闭文本编辑器。