查了一下 Ubuntu 的 driver 列表, 只有Ubuntu LTS 支持 EW-7711UAn (https://help.ubuntu.com/community/HardwareSupportComponentsWirelessNetworkCardsEdimax), 原文如下:
Works with LTS - RT3070USB driver from Ralink. "make" (ignore /tftpboot error), then "sudo make install DAT_PATH=/etc/Wireless/RT2870STA DAT_FILE_NAME=RT2870STA.dat" (2870 filename is hard-coded in driver). Add "blacklist rt2800usb" and "blacklist rt2870sta" to /etc/modprobe.d/blacklist.conf and reboot.
先下载driver, 解压缩, 然后
make
sudo make install DAT_PATH=/etc/Wireless/RT2870STA DAT_FILE_NAME=RT2870STA.dat
完成后 在 /etc/modprobe.d/blacklist.conf 中添加
blacklist rt2800usb
blacklist rt2870sta
重启, 网卡就可以用了.