Arch Linux

Rattle

Member

Registered: 2018-08-27

Posts: 4

[SOLVED] 8812au wifi failed with kernel 4.19.1.arch1-1

Posting this here for reference. After system upgrade wifi was not working. This was due to an incompatible-pointer-types error from compilation of the 8812au loadable kernel module I use, which could be found in /var/lib/dkms/rtl8812au/5.2.20.r9.gaca1e06/build/make.log

To resolve include this line in /var/lib/dkms/rtl8812au/5.2.20.r9.gaca1e06/source/Makefile
EXTRA_CFLAGS += -Wno-incompatible-pointer-types

Then run "dkms install rtl8812au/5.2.20.r9.gaca1e06 -k 4.19.1-arch1-1-ARCH" to recompile and install the module.

I'm not sure what changed as this module has gone through many previous kernel upgrades without issue.

loqs

Member

Registered: 2014-03-06

Posts: 17,373

Re: [SOLVED] 8812au wifi failed with kernel 4.19.1.arch1-1

Alternate solution update rtl8812au-dkms-git to the latest version ( currently 5.2.20.2.r12.gc39e615-1 ).

Martina Neumayer

Member

From: München

Registered: 2018-11-06

Posts: 8

Re: [SOLVED] 8812au wifi failed with kernel 4.19.1.arch1-1

That same issue happened also with the r8169 and ath9k drivers (both installed from the system repos).
When kernel is upgraded to mentioned above version, entire network is completely unavailable after the system reboot.
Sadly in my case only manual downgrade of this two packages (linux and linux-headers) to the v.4.18.16.arch1-1 helps.
I have observed such conditions at my machine:
- Network connections made with the Network Manager,
- Network cards used are based on the Realtek (ethernet card) and/or Atheros (wifi card) chipset,
- Vpn usage.
If I change NetworkManager to some other app, the issue disappears.
It can be called a dirty and only temporary workaround, but it certainly requires an permanent fix.

Last edited by Martina Neumayer (2018-11-16 15:41:05)

loqs

Member

Registered: 2014-03-06

Posts: 17,373

Re: [SOLVED] 8812au wifi failed with kernel 4.19.1.arch1-1

@Martina Neumayer you state it was the same issue.  How could switching to NetworkManager then have any effect if the kernel modules are not loaded because they failed to build?
Please start a new thread for your issue.