rtl8812au fails to build on focal with linux hwe 5.15

[Andrea Righi]

[Impact]

/home/ubuntu/rtl8812au-4.3.8.12175.20140902+dfsg/core/rtw_br_ext.c:25:10: fatal error: net/ipx.h: No such file or directory
   25 | #include <net/ipx.h>
      | ^~~~~~~~~~~
compilation terminated.

[Test case]

 $ sudo apt install rtl8812au-dkms

[Fix]

Drop IPX support (deprecated in newer kernel). Same patch has been applied in jammy (this fix is a backport of the same patch).

[Regression potential]

IPX is not supported anymore, so we may experience regressions for those that are still using and relying on this protocol with the rtl8821ce driver.

[Andrea Righi (arighi)]

debdiff in attach fixes build failures on focal with linux hwe 5.15.

[Dimitri John Ledkov (xnox)]

This could have been a backport of jammy's 4.3.8.12175.20140902+dfsg-0ubuntu15 including jammy's changelog and then version number 4.3.8.12175.20140902+dfsg-0ubuntu15~20.04.1

or it can be 4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.4 (as in .N+1 increment on the last upload).

But 4.3.8.12175.20140902+dfsg-0ubuntu14~20.04.3 does not make sense, as this upload is unrelated to 4.3.8.12175.20140902+dfsg-0ubuntu14 which adds v5.10 support which landed as 4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.3 already.

Uploading this as 4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.4.

In the future, if it is desired to ship backports of later development series dkms modules into prior series one can use `backportpackage` command to create correctly versioned backports with devel series changelogs included.

[Andy Whitcroft (apw)]

Hello Andrea, or anyone else affected,

Accepted rtl8812au into focal-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/rtl8812au/4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.4 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-focal. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Dimitri John Ledkov (xnox)]

1) launched focal lxd container
2) enabled proposed
3) installed the v5.15 based kernel
apt install linux-generic-hwe-20.04-edge
4) disabled proposed

5) observed that it fails to install

# apt install rtl8812au-dkms=4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.3
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  rtl8812au-dkms
0 upgraded, 1 newly installed, 0 to remove and 34 not upgraded.
Need to get 1116 kB of archives.
After this operation, 8906 kB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu focal-updates/universe amd64 rtl8812au-dkms all 4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.3 [1116 kB]
Fetched 1116 kB in 1s (1761 kB/s)
Selecting previously unselected package rtl8812au-dkms.
(Reading database ... 79023 files and directories currently installed.)
Preparing to unpack .../rtl8812au-dkms_4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.3_all.deb
...
Unpacking rtl8812au-dkms (4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.3) ...
Setting up rtl8812au-dkms (4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.3) ...
Loading new rtl8812au-4.3.8.12175.20140902+dfsg DKMS files...
It is likely that 5.13.0-40-generic belongs to a chroot's host
Building for 5.15.0-25-generic
Building initial module for 5.15.0-25-generic
Error! Bad return status for module build on kernel: 5.15.0-25-generic (x86_64)
Consult /var/lib/dkms/rtl8812au/4.3.8.12175.20140902+dfsg/build/make.log for more informati
on.
dpkg: error processing package rtl8812au-dkms (--configure):
 installed rtl8812au-dkms package post-installation script subprocess returned error exit s
tatus 10
Errors were encountered while processing:
 rtl8812au-dkms
E: Sub-process /usr/bin/dpkg returned an error code (1)

6) enabled proposed once again

7) observed that from proposed does not build and install fine.... it seems that despite being in a chroot and requesting to build against v5.15 kernel it tries to build against the host kernel:

Unpacking rtl8812au-dkms (4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.4) over (4.3.8.12175.20
140902+dfsg-0ubuntu13~20.04.3) ...
Setting up rtl8812au-dkms (4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.4) ...
Loading new rtl8812au-4.3.8.12175.20140902+dfsg DKMS files...
It is likely that 5.13.0-40-generic belongs to a chroot's host
Building for 5.15.0-25-generic
Building initial module for 5.15.0-25-generic
ERROR: Cannot create report: [Errno 17] File exists: '/var/crash/rtl8812au-dkms.0.crash'
Error! Bad return status for module build on kernel: 5.15.0-25-generic (x86_64)
Consult /var/lib/dkms/rtl8812au/4.3.8.12175.20140902+dfsg/build/make.log for more informati
on.
dpkg: error processing package rtl8812au-dkms (--configure):
 installed rtl8812au-dkms package post-installation script subprocess returned error exit s
tatus 10
dmesg: read kernel buffer failed: Operation not permitted
                                                         Errors were encountered while proc
essing:
 rtl8812au-dkms
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@normal-snake:~# cat /var/lib/dkms/rtl8812au/4.3.8.12175.20140902+dfsg/build/make.log
DKMS make.log for rtl...

[Dimitri John Ledkov (xnox)]

Opened bug report about the dkms.conf bug at https://bugs.launchpad.net/ubuntu/+source/rtl8812au/+bug/1970635

[Dimitri John Ledkov (xnox)]

1) launched focal lxd VM, removed kvm kernel, installed v5.15 hwe-20.04-edge kernel.

2) checked that existing module fails to install

Setting up rtl8812au-dkms (4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.3) ...
Loading new rtl8812au-4.3.8.12175.20140902+dfsg DKMS files...
Building for 5.15.0-25-generic
Building initial module for 5.15.0-25-generic
ERROR: Cannot create report: [Errno 17] File exists: '/var/crash/rtl8812au-dkms.0.crash'
Error! Bad return status for module build on kernel: 5.15.0-25-generic (x86_64)
Consult /var/lib/dkms/rtl8812au/4.3.8.12175.20140902+dfsg/build/make.log for more informati
on.
dpkg: error processing package rtl8812au-dkms (--configure):
 installed rtl8812au-dkms package post-installation script subprocess returned error exit s
tatus 10
Errors were encountered while processing:
 rtl8812au-dkms
E: Sub-process /usr/bin/dpkg returned an error code (1)

3) checked that new package installs correctly

Unpacking rtl8812au-dkms (4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.4) over (4.3.8.12175.20
140902+dfsg-0ubuntu13~20.04.3) ...
Setting up rtl8812au-dkms (4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.4) ...
Loading new rtl8812au-4.3.8.12175.20140902+dfsg DKMS files...
Building for 5.15.0-25-generic
Building initial module for 5.15.0-25-generic
Can't load /var/lib/shim-signed/mok/.rnd into RNG
140687348028736:error:2406F079:random number generator:RAND_load_file:Cannot open file:../c
rypto/rand/randfile.c:98:Filename=/var/lib/shim-signed/mok/.rnd
Generating a RSA private key
...........................................................................................
.....................................................................................+++++
..................+++++
writing new private key to '/var/lib/shim-signed/mok/MOK.priv'
-----
Done.

8812au.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/5.15.0-25-generic/updates/dkms/

depmod...

DKMS: install completed.

[Launchpad Janitor (janitor)]

This bug was fixed in the package rtl8812au - 4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.4

---------------
rtl8812au (4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.4) focal; urgency=medium

  * Support linux 5.15: (LP: #1960169)
    - debian/patches/0020-drop-ipx-and-apple-talk-support.patch

 -- Andrea Righi <email address hidden> Sun, 06 Feb 2022 18:06:19 +0000

[Brian Murray (brian-murray)]

The verification of the Stable Release Update for rtl8812au has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.