如何使D-Link 140 usb无线局域网工作？

Question

我刚刚安装了natty 1，我的d链接dwa-140b2 usb无线局域网dongle不再工作了。有什么解决办法吗？

这就是我在syslog得到的

Apr 12 20:00:16 agda kernel: [  118.779178] ieee80211 phy2: Selected rate control algorithm 'minstrel_ht'
Apr 12 20:00:16 agda kernel: [  118.786483] Registered led device: rt2800usb-phy2::radio
Apr 12 20:00:16 agda kernel: [  118.786572] Registered led device: rt2800usb-phy2::assoc
Apr 12 20:00:16 agda kernel: [  118.786658] Registered led device: rt2800usb-phy2::quality
Apr 12 20:00:16 agda NetworkManager[712]: <info> found WiFi radio killswitch rfkill2 (at /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-3/1-3:1.0/ieee80211/phy2/rfkill2) (driver <unknown>)
Apr 12 20:00:16 agda NetworkManager[712]: <info> (wlan0): driver supports SSID scans (scan_capa 0x01).
Apr 12 20:00:16 agda NetworkManager[712]: <info> (wlan0): new 802.11 WiFi device (driver: 'rt2800usb' ifindex: 5)
Apr 12 20:00:16 agda NetworkManager[712]: <info> (wlan0): exported as /org/freedesktop/NetworkManager/Devices/3
Apr 12 20:00:16 agda NetworkManager[712]: <info> (wlan0): now managed
Apr 12 20:00:16 agda NetworkManager[712]: <info> (wlan0): device state change: 1 -> 2 (reason 2)
Apr 12 20:00:16 agda NetworkManager[712]: <info> (wlan0): bringing up device.
Apr 12 20:00:16 agda NetworkManager[712]: <warn> (wlan0): firmware may be missing.
Apr 12 20:00:16 agda NetworkManager[712]: <info> (wlan0): deactivating device (reason: 2).
Apr 12 20:00:16 agda NetworkManager[712]:    SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-3/1-3:1.0/net/wlan0, iface: wlan0)
Apr 12 20:00:16 agda NetworkManager[712]:    SCPlugin-Ifupdown: device added (path: /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-3/1-3:1.0/net/wlan0, iface: wlan0): no ifupdown configuration found.
Apr 12 20:00:16 agda kernel: [  118.896657] phy2 -> rt2x00lib_request_firmware: Error - Current firmware does not support detected chipset

Answer 1

我还得到了一个DWA 140，并且在Natty 2上也受到了同样的问题的影响。造成这个问题的原因是Ubuntu不仅加载DWA 140所需的rt2870sta内核模块，还为其他罗利克芯片组加载一些其他模块。

首先看一下您已经加载了哪些ralink相关模块：

lsmod | grep ^rt

示例输出：

rt2870sta             450556  0 
rt2800usb              18235  0 
rt2800lib              45181  1 rt2800usb
rt2x00usb              20330  1 rt2800usb
rt2x00lib              49235  3 rt2800usb,rt2800lib,rt2x00usb

现在，您必须卸载以“rt”开头的所有内容：

sudo modprobe -rf rt2870sta rt2800usb rt2800lib rt2x00usb rt2x00lib

然后重新加载rt2870sta模块。

sudo modprobe rt2870sta

您现在应该能够连接到您的网络了。如果不希望在每次重新启动时加载/卸载这些模块，则必须在/etc/modprobe.d/blacklist.conf文件中列出不必要的模块，例如添加以下行：

blacklist rt2800usb
blacklist rt2800lib
blacklist rt2x00usb
blacklist rt2x00lib