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I'm trying to install an rtl18814 driver for an ASUS USB AC68 wifi adapter. There have been quite a few threads about this, which being ignorant I found impenetrable. But there was one thread that seemed straightforward. Following the suggestion by @SomeOne01 from this thread, I downloaded a zipfile called rtl8814au-master.zipfrom this site and followed @SomeOne01's instructions. It worked seamlessly on Ubuntu 18.04, which was a first in my ubuntu experience. But unfortunately I needed the adapter on a machine running 16.04 (xenial). When I ran make on that machine, I got the following error.

make ARCH=x86_64 CROSS_COMPILE= -C /lib/modules/4.4.0-139-generic/build M=/usr/local/src/rtl8814au-master  modules
make[1]: Entering directory '/usr/src/linux-headers-4.4.0-139-generic'
  CC [M]  /usr/local/src/rtl8814au-master/os_dep/linux/ioctl_cfg80211.o
/usr/local/src/rtl8814au-master/os_dep/linux/ioctl_cfg80211.c: In function  rtw_get_systime_us :
/usr/local/src/rtl8814au-master/os_dep/linux/ioctl_cfg80211.c:352:2: error: implicit declaration of function  ktime_get_boottime_ts64’[-Werror=implicit-function-declaration]
  ktime_get_boottime_ts64(&ts);
  ^
cc1: some warnings being treated as errors
scripts/Makefile.build:277: recipe for target '/usr/local/src/rtl8814au-master/os_dep/linux/ioctl_cfg80211.o' failed
make[2]: *** [/usr/local/src/rtl8814au-master/os_dep/linux/ioctl_cfg80211.o] Error 1
Makefile:1439: recipe for target '_module_/usr/local/src/rtl8814au-master' failed
make[1]: *** [_module_/usr/local/src/rtl8814au-master] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-4.4.0-139-generic'
Makefile:1699: recipe for target 'modules' failed
make: *** [modules] Error 2

Could anybody please suggest how to proceed on 16.04 xenial?

Thank you very much for any suggestions.

Community
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Leo Simon
  • 1,549

1 Answers1

1

This will be easier if you do 

sudo apt install git
git clone https://github.com/zebulon2/rtl8814au.git
cd rtl8814au
git checkout 7dde5bd
Then see if make succeeds. If the make command has no errors I would do 
make clean
cd ..
sudo apt install dkms
sudo dkms add ./rtl8814au
sudo dkms install rtl8814au/4.3.21

Reboot

There is an issue with the latest commit https://github.com/zebulon2/rtl8814au/commit/3cf715db6f8e021671b72918929a307847e77e92 as the kernel version specified for it should have been 4.17

If you happen to have no internet connection, edit the file usr/local/src/rtl8814au-master/os_dep/linux/ioctl_cfg80211.c at line 350 you will find 

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39))
Change it to 
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,17,0))
Then the make command should work without errors
Jeremy31
  • 13,293