在京东上给家里的台式机(DELL OPTIPLEX 380)买了一个腾达(Tenda)U12 1300M USB无线网卡，遗憾的是腾达官方的U12网卡驱动无法直接使用，因为其支持的Linux内核最大版本为4.4。那就自己想办法编译吧，本文接下来就介绍如何在Ubuntu16.04(32位内核)上编译并安装这一网卡驱动。

00 - 系统信息

$ cat /etc/*release | grep VERSION=

VERSION="16.04.6 LTS (Xenial Xerus)"

$ uname -rp

4.15.0-88-generic i686

01 - 尝试编译腾达官方提供的rtl8812au驱动

$ wget https://down.tenda.com.cn/uploadfile/U12/U12_linux_v5.1.5_19247_Driver.zip

$ unzip U12_linux_v5.1.5_19247_Driver.zip

$ cd U12_linux_v5.1.5_19247.20160830/driver

$ tar zxf rtl8812AU_linux_v5.1.5_19247.20160830.tar.gz

$ cd rtl8812AU_linux_v5.1.5_19247.20160830/

$ make

make ARCH=i386 CROSS_COMPILE= -C /lib/modules/4.15.0-88-generic/build M=/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830 modules

make[1]: Entering directory '/usr/src/linux-headers-4.15.0-88-generic'

CC [M] /tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/core/rtw_cmd.o

In file included from /tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/include/osdep_service.h:41:0,

from /tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/include/drv_types.h:32,

from /tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/core/rtw_cmd.c:22:

/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/include/osdep_service_linux.h: In function ‘_init_timer’:

/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/include/osdep_service_linux.h:273:8: error: ‘_timer {aka struct timer_list}’ has no member named ‘data’

ptimer->data = (unsigned long)cntx;

^

/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/include/osdep_service_linux.h:274:2: error: implicit declaration of function ‘init_timer’ [-Werror=implicit-function-declaration]

init_timer(ptimer);

^

In file included from /tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/include/drv_types.h:32:0,

from /tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/core/rtw_cmd.c:22:

/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/include/osdep_service.h: In function ‘thread_enter’:

/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/include/osdep_service.h:345:2: error: implicit declaration of function ‘allow_signal’ [-Werror=implicit-function-declaration]

allow_signal(SIGTERM);

^

/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/include/osdep_service.h: In function ‘flush_signals_thread’:

/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/include/osdep_service.h:355:6: error: implicit declaration of function ‘signal_pending’ [-Werror=implicit-function-declaration]

if (signal_pending(current))

^

/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/include/osdep_service.h:356:3: error: implicit declaration of function ‘flush_signals’ [-Werror=implicit-function-declaration]

flush_signals(current);

^

cc1: some warnings being treated as errors

scripts/Makefile.build:330: recipe for target '/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/core/rtw_cmd.o' failed

make[2]: *** [/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/core/rtw_cmd.o] Error 1

Makefile:1577: recipe for target '_module_/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830' failed

make[1]: *** [_module_/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830] Error 2

make[1]: Leaving directory '/usr/src/linux-headers-4.15.0-88-generic'

Makefile:1838: recipe for target 'modules' failed

make: *** [modules] Error 2

尝试修改了一些编译错误，例如：

--- /tmp/osdep_service_linux.h+++ /tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/include/osdep_service_linux.h

@@-57,6 +57,7@@

#include#include#include

+#include

#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 5, 41))#include@@-270,7 +271,7@@

{/*setup_timer(ptimer, pfunc,(u32)cntx);*/ptimer->function =pfunc;- ptimer->data = (unsigned long)cntx;+ ptimer->expires = (unsigned long)cntx;

init_timer(ptimer);

}

但是, init_timer(ptimer)的问题一时半会儿解决不了，

make ARCH=i386 CROSS_COMPILE= -C /lib/modules/4.15.0-88-generic/build M=/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830 modules

make[1]: Entering directory '/usr/src/linux-headers-4.15.0-88-generic'

CC [M] /tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/core/rtw_cmd.o

In file included from /tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/include/osdep_service.h:41:0,

from /tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/include/drv_types.h:32,

from /tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/core/rtw_cmd.c:22:

/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/include/osdep_service_linux.h: In function ‘_init_timer’:

/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/include/osdep_service_linux.h:275:2: error: implicit declaration of function ‘init_timer’ [-Werror=implicit-function-declaration]

init_timer(ptimer);

^

cc1: some warnings being treated as errors

scripts/Makefile.build:330: recipe for target '/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/core/rtw_cmd.o' failed

make[2]: *** [/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830/core/rtw_cmd.o] Error 1

Makefile:1577: recipe for target '_module_/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830' failed

make[1]: *** [_module_/tmp/U12_linux_v5.1.5_19247.20160830/driver/rtl8812AU_linux_v5.1.5_19247.20160830] Error 2

make[1]: Leaving directory '/usr/src/linux-headers-4.15.0-88-generic'

Makefile:1838: recipe for target 'modules' failed

make: *** [modules] Error 2

于是果断放弃这一"自己造轮子"的思路！

02 - 搜索现成的解决方案

使用关键字"rtl8812au" + "github"进行google搜索，

果然找到了一个GitHub的repo,

$ git clone https://github.com/gnab/rtl8812au.git

$ cd rtl8812au$make$sudo make install$file /lib/modules/4.15.0-88-generic/kernel/drivers/net/wireless/8812au.ko/lib/modules/4.15.0-88-generic/kernel/drivers/net/wireless/8812au.ko: ELF 32-bit LSB relocatable, Intel 80386, version 1 (SYSV), BuildID[sha1]=4be6be46e28f1bdd558f472dda7d35c86d435ece, not stripped

$ modinfo/lib/modules/4.15.0-88-generic/kernel/drivers/net/wireless/8812au.ko

filename:/lib/modules/4.15.0-88-generic/kernel/drivers/net/wireless/8812au.ko

version: v4.2.3author: Realtek Semiconductor Corp.

description: Realtek Wireless Lan Driver

license: GPL

srcversion: 719F640400ECDE6A55AB3B9

alias: usb:v0BDAp0823d*dc*dsc*dp*ic*isc*ip*in*.................................................

name: 8812au

vermagic:4.15.0-88-generic SMP mod_unload 686parm: rtw_ips_mode:The default IPS mode (int)

.................................................

parm: rtw_led_enable:Enable status LED (int)

$sudo modprobe8812au

$sudo lsmod | egrep8812au

8812au856064 0

连接wifi成功上网，网卡状态如下：

$ ethinfo enx502b73d14b1b

ETH MAC STATE DEVICEID VENDORID MTU SPEED BDF DRIVER IPv4

enx502b73d14b1b50:2b:73:d1:4b:1b up 1500 1-5:1.0 usb/drivers/rtl8812au 192.168.3.9/24

大功告成！Have  fun:-)

03 - 小结

做研究/写论文时，找不到相关文献往往只有两种可能：

没有选择合适的关键字(keywords)；

所提的问题没有意义，没有人做。

科研如此，解决日常生活及工作中遇到的问题也如此。之所以果断放弃自己修复rtl8812au驱动代码的方案，是因为：

首先，"自己发明轮子"的难度较大，时间成本太高；

其次，这个问题有价值，Linux内核不断迭代，rtl8812au既然没有被停产，那其驱动的升级维护就一定有同行在干或已经干成了。

果然一搜就有现成的代码，那就愉快地站在巨人的肩膀上have fun吧:-)

扩展阅读

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