Wrong build when kernel upgrade (about kernel header path)

[Mabin]

When I upgrade kernel with `apt` command,
this module built with wrong kernel header path.

If I use `4.10.0-20-generic` kernel version and I update `4.10.0-27-generic`,
dkms still use head path of `4.10.0-20-generic` for building.

I suggest to fix this way.

dkms.conf
MAKE="'make' all"
=>
MAKE="'make' all KVER=$kernelver"

Makefile 822 line
KVER := $(shell uname -r)
=>
KVER ?= $(shell uname -r)

[Ubuntu Foundations Team Bug Bot (crichton)]

The attachment "rtl8812au-4.3.8.12175.20140902+dfsg.patch" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

[Jeremy (wa113y3s)]

Mabin, I agree with your solution, see https://bugs.launchpad.net/ubuntu/+source/rtl8812au/+bug/1613837/comments/3

[Launchpad Janitor (janitor)]

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

[Oliver Gerlich (ogerlich)]

Mabin, thanks a lot for your patch, it appears to have fixed this problem for me (with Ubuntu 16.04.5 x86_64 and rtl8812au-dkms 4.3.8.12175.20140902+dfsg-0ubuntu2)!

I have applied the patch in /usr/src/rtl8812au-4.3.8.12175.20140902+dfsg/ directory. Afterwards I could use "dkms remove" to remove a module that was built for an older kernel version, and then use "dkms autoinstall --kernelver ..." to build the module for that specific kernel version again. modinfo then showed that the newly built module had the correct kernel listed in its "vermagic" field.

[Oliver Gerlich (ogerlich)]

Btw. this appears to be a common type of issue with DKMS; eg. bug 1687492 appears to be the same issue in another dkms source package, and the fix was kinda similar.

[Reinhard Koehn (rekoehn)]

This bug is till today not fixed in Ubuntu 18.04

[Solitaire (bill-s0l)]

Running :
Ubuntu 19.04
kernel 5.0.0-14-generic

rtl8812au based Edimax EW-7811UTC AC600 Wireless Dual-Band Mini USB 2.0 Adapter

Still need to reinstall "rtl8812au-dkms" every time the kernel updates

[Ernst (ernst-blaauw)]

Can anyone explain how I can apply this patch easily? It is kind of annoying I have to reinstall every time. Of course I understand that the developers are busy and maybe this issue is not on top of their list. So if anyone can help me how to sort this out myself...

[Oliver Gerlich (ogerlich)]

Ernst, you can apply Mabins patch with these commands:

- cd /tmp/ && wget https://launchpadlibrarian.net/330175838/rtl8812au-4.3.8.12175.20140902+dfsg.patch
- cd /usr/src/
- sudo patch -p0 < /tmp/rtl8812au-4.3.8.12175.20140902+dfsg.patch

After the next kernel upgrade the rtl8812ae module should be automatically built for the newly installed kernel version.

[Ryan C. Underwood (nemesis-icequake)]

Does this package have an owner? This really needs to be fixed since it blocks every new user of Ubuntu with this network hardware who has automatic upgrades enabled.