如何让 D-Link DWA-140 usb wlan 工作？

Question

我刚刚安装了 natty beta 1，我的 d-link dwa-140b2 usb wlan dongle 不再工作了。有关如何修复它的任何想法？

这是我在系统日志中得到的

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

我也有一个 DWA 140 并且在 Natty Beta 2 上受到同样问题的影响。 问题的原因是 Ubuntu 不仅加载rt2870sta了 DWA 140 所需的内核模块，它还加载了其他一些模块雷凌芯片组。

首先看看你加载了哪些 ralink 相关的模块：

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。如果您不想在每次重新启动时加载/卸载这些模块，则必须将/etc/modprobe.d/blacklist.conf文件中不需要的模块列入黑名单，例如添加以下行：

blacklist rt2800usb
blacklist rt2800lib
blacklist rt2x00usb
blacklist rt2x00lib