买了个TL-WDN5200H无线usb网卡,但是发现它居然不支持Linux,但是我有时需要在Linux上使用,这就尴尬了.于是到网上搜索资料,终于解决了这个问题.

1. 首先编译安装:https://github.com/whitebatman2/rtl8821CU
   根据它的README文档，Ubuntu下可以这样安装：

sudo apt-get install dkms

DRV_NAME=rtl8821CU
DRV_VERSION=5.2.5.3
sudo mkdir /usr/src/${DRV_NAME}-${DRV_VERSION}
git archive master | sudo tar -x -C /usr/src/${DRV_NAME}-${DRV_VERSION}
sudo dkms add -m ${DRV_NAME} -v ${DRV_VERSION}
sudo dkms build -m ${DRV_NAME} -v ${DRV_VERSION}
sudo dkms install -m ${DRV_NAME} -v ${DRV_VERSION}

# 下载工程
git clone https://github.com/whitebatman2/rtl8821CU.git
cd rtl8821CU

make
sudo make install
sudo modprobe 8821cu

2. 使用lsusb命令观察网卡的编号(插拔前后的变化)

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
Bus 001 Device 002: ID 04d9:0223 Holtek Semiconductor, Inc. 
Bus 001 Device 013: ID 0bda:1a2b Realtek Semiconductor Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

TL-WDN5200H的编号就是0bda:1a2b.

3. 切换usb网卡的模式为无线网卡模式:

sudo usb_modeswitch -KW -v 0bda -p 1a2b

输出如下:

Take all parameters from the command line


 * usb_modeswitch: handle USB devices with multiple modes
 * Version 2.5.2 (C) Josua Dietze 2017
 * Based on libusb1/libusbx

 ! PLEASE REPORT NEW CONFIGURATIONS !

DefaultVendor=  0x0bda
DefaultProduct= 0x1a2b

StandardEject=1

Look for default devices ...
  found USB ID 1d6b:0003
  found USB ID 093a:2510
  found USB ID 04d9:0223
  found USB ID 0bda:1a2b
   vendor ID matched
   product ID matched
  found USB ID 1d6b:0002
 Found devices in default mode (1)
Access device 013 on bus 001
Get the current device configuration ...
Current configuration number is 1
Use interface number 0
 with class 8
Use endpoints 0x0b (out) and 0x8a (in)

USB description data (for identification)
-------------------------
Manufacturer: Realtek
     Product: DISK
  Serial No.: not provided
-------------------------
Sending standard EJECT sequence
Looking for active drivers ...
 OK, driver detached
Set up interface 0
Use endpoint 0x0b for message sending ...
Trying to send message 1 to endpoint 0x0b ...
 OK, message successfully sent
Read the response to message 1 (CSW) ...
 Response successfully read (13 bytes), status 1
Trying to send message 2 to endpoint 0x0b ...
 OK, message successfully sent
Read the response to message 2 (CSW) ...
 Response successfully read (13 bytes), status 0
Trying to send message 3 to endpoint 0x0b ...
 Sending the message returned error -1. Try to continue
Read the response to message 3 (CSW) ...
 Device seems to have vanished after reading. Good.
 Device is gone, skip any further commands
-> Run lsusb to note any changes. Bye!

惊喜的发现无线可用了!