rtl8812au-dkms 4.3.8.12175.20140902+dfsg-0ubuntu2: rtl8812au kernel module failed to build [error: implicit declaration of function ‘allow_signal’]

Status changed to 'Confirmed' because the bug affects multiple users.

I am hitting the same issue; any suggested workaround?

Yes, see
https://askubuntu.com/questions/994779/broken-wifi-rtl8812au-after-16-04-update-to-kernel-4-13-0-26

On 30 January 2018 at 05:32, Rami J <email address hidden> wrote:

> I am hitting the same issue; any suggested workaround?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1742426
>
> Title:
> rtl8812au-dkms 4.3.8.12175.20140902+dfsg-0ubuntu2: rtl8812au kernel
> module failed to build [error: implicit declaration of function
> ‘allow_signal’]
>
> Status in rtl8812au package in Ubuntu:
> Confirmed
>
> Bug description:
> After the system update my wifi driver doesn't work anymore.
>
> ProblemType: Package
> DistroRelease: Ubuntu 16.04
> Package: rtl8812au-dkms (not installed)
> ProcVersionSignature: Ubuntu 4.13.0-26.29~16.04.2-generic 4.13.13
> Uname: Linux 4.13.0-26-generic i686
> ApportVersion: 2.20.1-0ubuntu2.15
> Architecture: i386
> DKMSKernelVersion: 4.13.0-26-generic
> Date: Wed Jan 10 12:36:11 2018
> DuplicateSignature: dkms:rtl8812au-dkms:4.3.8.
> 12175.20140902+dfsg-0ubuntu2:/var/lib/dkms/rtl8812au/4.3.8.
> 12175.20140902+dfsg/build/include/osdep_service.h:343:2: error: implicit
> declaration of function ‘allow_signal’ [-Werror=implicit-function-
> declaration]
> InstallationDate: Installed on 2018-01-01 (8 days ago)
> InstallationMedia: Xubuntu 16.04.3 LTS "Xenial Xerus" - Release i386
> (20170801)
> PackageVersion: 4.3.8.12175.20140902+dfsg-0ubuntu2
> RelatedPackageVersions:
> dpkg 1.18.4ubuntu1.3
> apt 1.2.24
> SourcePackage: rtl8812au
> Title: rtl8812au-dkms 4.3.8.12175.20140902+dfsg-0ubuntu2: rtl8812au
> kernel module failed to build
> UpgradeStatus: No upgrade log present (probably fresh install)
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/rtl8812au/+bug/
> 1742426/+subscriptions
>

I've attempted to follow the solution,but it has not worked for me. I still need to boot form v4.10 instead of v4.13

Might be a silly question, but did you try installing driver why running kernel v4.10 instead of v4.13? I have plugged in the network cable, booted to v4.13 and installed rtl driver. Rebooted. This worked for me, although this way after each kernel upgrade manual installation will be needed (again).

I downloaded the driver while using kernel v4.10 and booted in v4.13 and followed the steps. no success. also no ethernet port.

I have documented the patch needed to fix this issue in my last comment in this thread: https://bugs.launchpad.net/ubuntu/+source/rtl8812au/+bug/1637059

ZOWEETEK cheapo sub wifi dongle from Amazon stopped working after ubuntu update.
downloading and running the autoinstall for this driver got me going again rtl8821AU_linux_v4.3.14_13455.20150212_BTCOEX20150128-51.tar.gz
I'm running 32 bit 16.04

Solution

https://askubuntu.com/questions/799108/2-dkms-drivers-wont-build-correctly-when-installing-new-kernel-after-software-u