我有一个双启动配置，默认的 Windows 8.1 和最新的 Ubuntu 14.10 64 位。
无线网络非常很慢。在 Windows 8.1 上，它运行良好，而在 Ubuntu 上，我得到的速度几乎是原来的 1/8。
但是，当我使用以太网时，我获得了应有的完整下载/上传速度，就像 Windows 一样。
当我从以太网切换到无线时，所有网站突然停止加载，并且apt-get需要很长时间才能开始下载。
下列的这个脚本，输出如下：
########## wireless info START ##########
Report from: 21 Jan 2015 14:59 IST +0530
Booted last: 21 Jan 2015 09:50 IST +0530
Script from: 20 Sep 2014 23:04 UTC +0000
##### release ###########################
Distributor ID: Ubuntu
Description: Ubuntu 14.10
Release: 14.10
Codename: utopic
##### kernel ############################
Linux 3.16.0-23-generic #31-Ubuntu SMP Tue Oct 21 17:56:17 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, vt.handoff=7
##### desktop ###########################
Ubuntu
##### lspci #############################
3b:00.0 Network controller [0280]: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter [168c:0036] (rev 01)
Subsystem: Lite-On Communications Inc Device [11ad:0652]
Kernel driver in use: ath9k
3c:00.0 Ethernet controller [0200]: Qualcomm Atheros QCA8171 Gigabit Ethernet [1969:10a1] (rev 10)
Subsystem: ASUSTeK Computer Inc. Device [1043:200f]
Kernel driver in use: alx
##### lsusb #############################
Bus 002 Device 002: ID 8087:8000 Intel Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:8008 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 004: ID 04f2:b414 Chicony Electronics Co., Ltd
Bus 003 Device 005: ID 0b05:17fd ASUSTek Computer, Inc.
Bus 003 Device 002: ID 0b05:17ac ASUSTek Computer, Inc.
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
1: asus-wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
2: asus-bluetooth: Bluetooth
Soft blocked: yes
Hard blocked: no
##### lsmod #############################
asus_nb_wmi 16990 0
asus_wmi 24094 1 asus_nb_wmi
sparse_keymap 13948 1 asus_wmi
mxm_wmi 13021 0
ath9k 136984 0
ath9k_common 25638 1 ath9k
ath9k_hw 446568 2 ath9k_common,ath9k
ath 29052 3 ath9k_common,ath9k,ath9k_hw
mac80211 660592 1 ath9k
cfg80211 510218 4 ath,ath9k_common,ath9k,mac80211
wmi 19193 2 mxm_wmi,asus_wmi
video 20128 2 i915,asus_wmi
##### interfaces ########################
auto lo
iface lo inet loopback
##### ifconfig ##########################
eth0 Link encap:Ethernet HWaddr <MAC 'eth0' [IF]>
inet addr:192.168.0.6 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:332173 errors:0 dropped:0 overruns:0 frame:0
TX packets:341601 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:398756806 (398.7 MB) TX bytes:32561235 (32.5 MB)
Interrupt:19
wlan0 Link encap:Ethernet HWaddr <MAC 'wlan0' [IF]>
inet addr:192.168.0.4 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1390 errors:0 dropped:0 overruns:0 frame:0
TX packets:86 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:126178 (126.1 KB) TX bytes:14213 (14.2 KB)
##### iwconfig ##########################
eth0 no wireless extensions.
lo no wireless extensions.
wlan0 IEEE 802.11bgn ESSID:"NETGEAR61"
Mode:Managed Frequency:2.462 GHz Access Point: <MAC 'NETGEAR61' [AC1]>
Bit Rate=1 Mb/s Tx-Power=16 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=70/70 Signal level=-24 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:2 Invalid misc:69 Missed beacon:0
##### route #############################
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0
192.168.0.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0
192.168.0.0 0.0.0.0 255.255.255.0 U 9 0 0 wlan0
##### resolv.conf #######################
nameserver 127.0.1.1
##### nm-tool ###########################
NetworkManager Tool
State: connected (global)
- Device: eth0 [Auto Ethernet] ------------------------------------------------
Type: Wired
Driver: alx
State: connected
Default: yes
HW Address: <MAC 'eth0' [IF]>
Capabilities:
Carrier Detect: yes
Speed: 100 Mb/s
Wired Properties
Carrier: on
IPv4 Settings:
Address: 192.168.0.6
Prefix: 24 (255.255.255.0)
Gateway: 192.168.0.1
DNS: 192.168.0.1
- Device: wlan0 [NETGEAR61] ---------------------------------------------------
Type: 802.11 WiFi
Driver: ath9k
State: connected
Default: no
HW Address: <MAC 'wlan0' [IF]>
Capabilities:
Speed: 1 Mb/s
Wireless Properties
WEP Encryption: yes
WPA Encryption: yes
WPA2 Encryption: yes
Wireless Access Points (* = current AP)
*NETGEAR61: Infra, <MAC 'NETGEAR61' [AC1]>, Freq 2462 MHz, Rate 54 Mb/s, Strength 97 WPA2
Photon Max 3G Wi-Fi_BD89: Infra, <MAC 'Photon Max 3G Wi-Fi_BD89' [AN2]>, Freq 2437 MHz, Rate 54 Mb/s, Strength 9 WPA2
IPv4 Settings:
Address: 192.168.0.4
Prefix: 24 (255.255.255.0)
Gateway: 192.168.0.1
DNS: 192.168.0.1
##### NetworkManager.state ##############
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
##### NetworkManager.conf ###############
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
[ifupdown]
managed=false
##### NetworkManager profiles ###########
[[/etc/NetworkManager/system-connections/NETGEAR61]] (600 root)
[connection] id=NETGEAR61 | type=802-11-wireless
[802-11-wireless] ssid=NETGEAR61 | mac-address=<MAC 'wlan0' [IF]>
[ipv4] method=auto
[ipv6] method=auto
##### iw reg get ########################
Region: Asia/Kolkata (based on set time zone)
country CN: DFS-UNSET
(2402 - 2482 @ 40), (N/A, 20)
(5735 - 5835 @ 40), (N/A, 30)
(57240 - 59400 @ 2160), (N/A, 28)
(59400 - 63720 @ 2160), (N/A, 44)
(63720 - 65880 @ 2160), (N/A, 28)
##### iwlist channels ###################
eth0 no frequency information.
lo no frequency information.
wlan0 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 #######################
Channel occupancy:
1 APs on Frequency:2.417 GHz (Channel 2)
1 APs on Frequency:2.462 GHz (Channel 11)
eth0 Interface doesn't support scanning.
lo Interface doesn't support scanning.
wlan0 Scan completed :
Cell 01 - Address: <MAC 'NETGEAR61' [AC1]>
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=70/70 Signal level=-24 dBm
Encryption key:on
ESSID:"NETGEAR61"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s
Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=0000002aac9e0909
Extra: Last beacon: 56ms ago
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
Cell 02 - Address: <MAC '' [AC2]>
Channel:2
Frequency:2.417 GHz (Channel 2)
Quality=26/70 Signal level=-84 dBm
Encryption key:on
ESSID:""
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=0000001f88233184
Extra: Last beacon: 2268ms ago
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
##### module infos ######################
[ath9k]
filename: /lib/modules/3.16.0-23-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k.ko
license: Dual BSD/GPL
description: Support for Atheros 802.11n wireless LAN cards.
author: Atheros Communications
srcversion: F1B005F210401E25BEA4125
depends: ath9k_hw,mac80211,ath9k_common,cfg80211,ath
intree: Y
vermagic: 3.16.0-23-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: D1:20:C4:7C:14:BE:B6:2E:AD:67:03:D4:17:12:CC:11:05:75:D2:97
sig_hashalgo: sha512
parm: debug:Debugging mask (uint)
parm: nohwcrypt:Disable hardware encryption (int)
parm: blink:Enable LED blink on activity (int)
parm: btcoex_enable:Enable wifi-BT coexistence (int)
parm: bt_ant_diversity:Enable WLAN/BT RX antenna diversity (int)
parm: ps_enable:Enable WLAN PowerSave (int)
parm: use_chanctx:Enable channel context for concurrency (int)
[ath9k_common]
filename: /lib/modules/3.16.0-23-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k_common.ko
license: Dual BSD/GPL
description: Shared library for Atheros wireless 802.11n LAN cards.
author: Atheros Communications
srcversion: 50297023DA06CB0C907A2CA
depends: cfg80211,ath9k_hw,ath
intree: Y
vermagic: 3.16.0-23-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: D1:20:C4:7C:14:BE:B6:2E:AD:67:03:D4:17:12:CC:11:05:75:D2:97
sig_hashalgo: sha512
[ath9k_hw]
filename: /lib/modules/3.16.0-23-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k_hw.ko
license: Dual BSD/GPL
description: Support for Atheros 802.11n wireless LAN cards.
author: Atheros Communications
srcversion: 765883F7BDCD751661973EB
depends: ath
intree: Y
vermagic: 3.16.0-23-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: D1:20:C4:7C:14:BE:B6:2E:AD:67:03:D4:17:12:CC:11:05:75:D2:97
sig_hashalgo: sha512
[ath]
filename: /lib/modules/3.16.0-23-generic/kernel/drivers/net/wireless/ath/ath.ko
license: Dual BSD/GPL
description: Shared library for Atheros wireless LAN cards.
author: Atheros Communications
srcversion: 165C1DF76AF8C8B6A45DA4F
depends: cfg80211
intree: Y
vermagic: 3.16.0-23-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: D1:20:C4:7C:14:BE:B6:2E:AD:67:03:D4:17:12:CC:11:05:75:D2:97
sig_hashalgo: sha512
[mac80211]
filename: /lib/modules/3.16.0-23-generic/kernel/net/mac80211/mac80211.ko
license: GPL
description: IEEE 802.11 subsystem
srcversion: 0D5DBE66E4CC44B010DB516
depends: cfg80211
intree: Y
vermagic: 3.16.0-23-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: D1:20:C4:7C:14:BE:B6:2E:AD:67:03:D4:17:12:CC:11:05:75:D2:97
sig_hashalgo: sha512
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/3.16.0-23-generic/kernel/net/wireless/cfg80211.ko
description: wireless configuration support
license: GPL
author: Johannes Berg
srcversion: DEE8EAA48495E392CD51C2D
depends:
intree: Y
vermagic: 3.16.0-23-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: D1:20:C4:7C:14:BE:B6:2E:AD:67:03:D4:17:12:CC:11:05:75:D2:97
sig_hashalgo: sha512
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 #################
[ath9k]
blink: 0
bt_ant_diversity: 0
btcoex_enable: 0
nohwcrypt: 1
ps_enable: 0
use_chanctx: 0
[mac80211]
beacon_loss_count: 7
ieee80211_default_rc_algo: minstrel_ht
max_nullfunc_tries: 2
max_probe_tries: 5
probe_wait_ms: 500
[cfg80211]
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00
##### /etc/modules ######################
##### modprobe options ##################
[/etc/modprobe.d/ath9k.conf]
options ath9k nohwcrypt=1
[/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/modesetting.conf]
options cirrus modeset=1
options mgag200 modeset=1
##### rc.local ##########################
exit 0
##### pm-utils ##########################
##### udev rules ########################
[/etc/udev/rules.d/70-persistent-net.rules]
# PCI device 0x1969:0x10a1 (alx)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'eth0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x168c:0x0036 (ath9k)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'wlan0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"
##### dmesg #############################
[ 13.299029] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 17.225704] wlan0: authenticate with <MAC 'NETGEAR61' [AC1]>
[ 17.241172] wlan0: send auth to <MAC 'NETGEAR61' [AC1]> (try 1/3)
[ 17.245068] wlan0: authenticated
[ 17.246828] wlan0: associate with <MAC 'NETGEAR61' [AC1]> (try 1/3)
[ 17.253065] wlan0: RX AssocResp from <MAC 'NETGEAR61' [AC1]> (capab=0x431 status=0 aid=3)
[ 17.253112] wlan0: associated
[ 17.253131] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 17.255059] ath: EEPROM regdomain: 0x809c
[ 17.255060] ath: EEPROM indicates we should expect a country code
[ 17.255061] ath: doing EEPROM country->regdmn map search
[ 17.255062] ath: country maps to regdmn code: 0x52
[ 17.255063] ath: Country alpha2 being used: CN
[ 17.255064] ath: Regpair used: 0x52
[ 17.255065] ath: regdomain 0x809c dynamically updated by country IE
########## wireless info END ############
我几乎按照 Ask Ubuntu 和其他网站上提到的所有解决方案进行了操作，但似乎都没有效果。
华硕的支持让我失望了。当我联系他们时：
对于您的情况，这可能是由于缺少驱动程序造成的。（驱动程序与 Linux Ubuntu 不兼容）
供您参考，根据支持网站： http://support.asus.com.cn/download.aspx?SLanguage=en&p=3&m=G751JM&hashedid=H1PGPvZ0ODsnDxTf
笔记本G751JM只有win8.1版本的驱动
我们不建议用户将 Linux Ubuntu 操作系统与 G751JM 产品一起使用。
我们已将您的邮件转交给技术研发团队，让他们检查并考虑在将来构建它。
很抱歉造成您的不便。非常感谢您的理解
感谢您对华硕产品的支持。祝您有美好的一天。
当我发现自己用自己的积蓄购买的笔记本电脑与我最常用的操作系统不兼容时，我怎么能过上好日子呢？
如果有人能为我指出这个问题的另一种解决方案，我将不胜感激。购买外部无线网卡是唯一可行的解决方案吗？
答案1
对于 Atheros 卡，您可以停用驱动程序的硬件加密。这不会影响软件加密，如 WPA2 等：
echo "options ath9k nohwcrypt=1" | sudo tee -a /etc/modprobe.d/ath9k.conf
sudo modprobe -rfv ath9k
sudo modprobe -v ath9k