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我现在的本是ACER4750，配AR9287无线网卡，驱动是内核的ath9k，装了11.04。
现在现象是上网特别慢，在离路由几米到10米内使用，ping 路由器 数字在几十到几千ms不等，有时也会2ms左右正常状态。上网下载的时候速度经常会突然掉到只有几k，过一段时间恢复高速。
PING 172.16.1.1 (172.16.1.1) 56(84) bytes of data.
64 bytes from 172.16.1.1: icmp_req=1 ttl=64 time=61.3 ms
64 bytes from 172.16.1.1: icmp_req=2 ttl=64 time=91.5 ms
64 bytes from 172.16.1.1: icmp_req=3 ttl=64 time=4.74 ms
64 bytes from 172.16.1.1: icmp_req=4 ttl=64 time=129 ms
64 bytes from 172.16.1.1: icmp_req=5 ttl=64 time=254 ms
64 bytes from 172.16.1.1: icmp_req=6 ttl=64 time=276 ms
64 bytes from 172.16.1.1: icmp_req=7 ttl=64 time=708 ms
64 bytes from 172.16.1.1: icmp_req=8 ttl=64 time=117 ms
64 bytes from 172.16.1.1: icmp_req=9 ttl=64 time=139 ms
64 bytes from 172.16.1.1: icmp_req=10 ttl=64 time=366 ms
64 bytes from 172.16.1.1: icmp_req=13 ttl=64 time=2.51 ms
64 bytes from 172.16.1.1: icmp_req=14 ttl=64 time=13.3 ms
64 bytes from 172.16.1.1: icmp_req=15 ttl=64 time=175 ms
64 bytes from 172.16.1.1: icmp_req=16 ttl=64 time=17.2 ms
64 bytes from 172.16.1.1: icmp_req=17 ttl=64 time=41.5 ms
64 bytes from 172.16.1.1: icmp_req=18 ttl=64 time=35.0 ms
64 bytes from 172.16.1.1: icmp_req=19 ttl=64 time=5.77 ms
64 bytes from 172.16.1.1: icmp_req=20 ttl=64 time=6.38 ms
64 bytes from 172.16.1.1: icmp_req=21 ttl=64 time=7.37 ms
64 bytes from 172.16.1.1: icmp_req=22 ttl=64 time=54.5 ms
64 bytes from 172.16.1.1: icmp_req=23 ttl=64 time=8.55 ms
64 bytes from 172.16.1.1: icmp_req=24 ttl=64 time=71.2 ms
64 bytes from 172.16.1.1: icmp_req=25 ttl=64 time=93.8 ms
64 bytes from 172.16.1.1: icmp_req=26 ttl=64 time=115 ms
64 bytes from 172.16.1.1: icmp_req=27 ttl=64 time=36.2 ms
64 bytes from 172.16.1.1: icmp_req=28 ttl=64 time=31.2 ms
64 bytes from 172.16.1.1: icmp_req=29 ttl=64 time=81.1 ms
64 bytes from 172.16.1.1: icmp_req=30 ttl=64 time=15.4 ms
64 bytes from 172.16.1.1: icmp_req=31 ttl=64 time=24.2 ms
64 bytes from 172.16.1.1: icmp_req=32 ttl=64 time=251 ms
64 bytes from 172.16.1.1: icmp_req=33 ttl=64 time=70.6 ms
64 bytes from 172.16.1.1: icmp_req=34 ttl=64 time=92.0 ms
^C
--- 172.16.1.1 ping statistics ---
34 packets transmitted, 32 received, 5% packet loss, time 33044ms
rtt min/avg/max/mdev = 2.513/106.301/708.476/140.233 ms

外接一个USB的卡使用是正常的，ping稳定在2ms左右，路由没问题。

装了个fedora15，网卡正常。
能把内核或驱动移植过来用吗？

在这下载了最新的驱动，编译安装成功。
http://wireless.kernel.org/download/com ... 01.tar.bz2

现在好多了，平均3ms：

--- 172.16.1.1 ping statistics ---
200 packets transmitted, 200 received, 0% packet loss, time 199295ms
rtt min/avg/max/mdev = 1.893/2.784/46.522/3.190 ms

你好，我想买这个型号的无线网卡，但是不知道是否符合我的要求，能否麻烦你执行一下这个命令把输出发给我，我好做个参考

iw list

非常感谢。

$ iw list
Wiphy phy0
Band 1:
Capabilities: 0x11ce
HT20/HT40
SM Power Save disabled
RX HT40 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 8 usec (0x06)
HT TX/RX MCS rate indexes supported: 0-15
Frequencies:
* 2412 MHz [1] (20.0 dBm)
* 2417 MHz [2] (20.0 dBm)
* 2422 MHz [3] (20.0 dBm)
* 2427 MHz [4] (20.0 dBm)
* 2432 MHz [5] (20.0 dBm)
* 2437 MHz [6] (20.0 dBm)
* 2442 MHz [7] (20.0 dBm)
* 2447 MHz [8] (20.0 dBm)
* 2452 MHz [9] (20.0 dBm)
* 2457 MHz [10] (20.0 dBm)
* 2462 MHz [11] (20.0 dBm)
* 2467 MHz [12] (20.0 dBm) (passive scanning)
* 2472 MHz [13] (20.0 dBm) (passive scanning)
* 2484 MHz [14] (disabled)
Bitrates (non-HT):
* 1.0 Mbps
* 2.0 Mbps (short preamble supported)
* 5.5 Mbps (short preamble supported)
* 11.0 Mbps (short preamble supported)
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
max # scan SSIDs: 4
Supported interface modes:
* IBSS
* managed
* AP
* AP/VLAN
* monitor
* mesh point
Supported commands:
* new_interface
* set_interface
* new_key
* new_beacon
* new_station
* new_mpath
* set_mesh_params
* set_bss
* authenticate
* associate
* deauthenticate
* disassociate
* join_ibss
* Unknown command (55)
* Unknown command (57)
* Unknown command (59)
* set_wiphy_netns
* Unknown command (65)
* connect
* disconnect

我现在的路由器是54M的，网卡可以300M，我试过另一个11n的路由是可以的.
这个网卡好象不如另一个本的intel 5100网卡好。

谢谢lz

e21 写了：在这下载了最新的驱动，编译安装成功。
http://wireless.kernel.org/download/com ... 01.tar.bz2

现在好多了，平均3ms：

--- 172.16.1.1 ping statistics ---
200 packets transmitted, 200 received, 0% packet loss, time 199295ms
rtt min/avg/max/mdev = 1.893/2.784/46.522/3.190 ms

我也遇到这个问题，但编译的时候遇到错误：
error: redefinition of 'ath_pci_init'
error: redefinition of 'ath_pci_exit'

要怎么解决？