[SRU] should disable DKMS build against kernel v5.0.0 or above

[You-Sheng Yang]

[Impact]
7906 should be used against kernels not newer than v5.0, especially v5.3, which has already known regression that fails Wi-Fi association.

[Fix]
Add "OBSOLETE_BY=5.0.0" to dkms conf.

[Test Case]
1. Install packages in ppa:vicamo/ppa-1859389
2. Modules will still be built, but the original in-tree kernel modules won't be overridden. From `dkms status` one should find following warnings for kernels >= 5.0.0:

  WARNING! Diff between built and installed module!

[Regression Potential]
7906 is meant for 4.15 kernels for Bionic. New models should have been supported directly in 5.x kernels via SRU. So the regression potential should be LOW here.

========== original bug description ==========

Ubuntu kernel v5.0 or above should have enough backports to enable AX201 family, there should be little reason one would need DKMS on such systems. Besides, 7906 has been pretty outdated in comparison to what we already have in kernel, actually it could even cause more problems than gains.

Therefore, for Bionic 4.15 kernels (-generic & -oem) we will still recommends the use of this DKMS as v4.15 is even more outdated. For Bionic hwe kernels (5.0) or hwe-edge (5.3) kernels, the use of this DKMS should be obsoleted. Same applies to Disco/Eoan/Focal.

[You-Sheng Yang (vicamo)]

Marking Focal as INVALID explicitly because Focal is still a series in development, and we'll constantly import new upstream revisions into Focal, so it's supposed to be always newer than the in-tree kernel.

[You-Sheng Yang (vicamo)]

PPA: https://launchpad.net/~vicamo/+archive/ubuntu/ppa-1859389

[You-Sheng Yang (vicamo)]

Add Bionic as bug 1856024 is FIXRELEASED first and now we have 7906 in Bionic as well.

[You-Sheng Yang (vicamo)]

Waiting for approval:
https://launchpad.net/ubuntu/eoan/+queue?queue_state=1&queue_text=backport-iwlwifi-dkms
https://launchpad.net/ubuntu/bionic/+queue?queue_state=1&queue_text=backport-iwlwifi-dkms

[Timo Aaltonen (tjaalton)]

Hello You-Sheng, or anyone else affected,

Accepted backport-iwlwifi-dkms into eoan-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/backport-iwlwifi-dkms/7906-0ubuntu4 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 and change the tag from verification-needed-eoan to verification-done-eoan. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-eoan. 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.

[Timo Aaltonen (tjaalton)]

Hello You-Sheng, or anyone else affected,

Accepted backport-iwlwifi-dkms into bionic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/backport-iwlwifi-dkms/7906-0ubuntu4~18.04.1 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 and change the tag from verification-needed-bionic to verification-done-bionic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-bionic. 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.

[You-Sheng Yang (vicamo)]

Verified bionic-proposed 7906-0ubuntu4~18.04.1, eoan-proposed 7906-0ubuntu4.

[Launchpad Janitor (janitor)]

This bug was fixed in the package backport-iwlwifi-dkms - 7906-0ubuntu4

---------------
backport-iwlwifi-dkms (7906-0ubuntu4) eoan; urgency=medium

  * debian/backport-iwlwifi-dkms.dkms.in
    - Add OBSOLETE_BY="5.0.0". (LP: #1859389)

  * debian/gbp.conf
    - Use tags for upstream tree.

 -- You-Sheng Yang <email address hidden> Mon, 13 Jan 2020 14:14:37 +0800

[Łukasz Zemczak (sil2100)]

The verification of the Stable Release Update for backport-iwlwifi-dkms 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.

[Launchpad Janitor (janitor)]

This bug was fixed in the package backport-iwlwifi-dkms - 7906-0ubuntu4~18.04.1

---------------
backport-iwlwifi-dkms (7906-0ubuntu4~18.04.1) bionic; urgency=medium

  * debian/backport-iwlwifi-dkms.dkms.in
    - Add OBSOLETE_BY="5.0.0". (LP: #1859389)

  * debian/gbp.conf
    - Use tags for upstream tree.
    - Update debian-branch to bionic.

 -- You-Sheng Yang <email address hidden> Mon, 13 Jan 2020 14:14:37 +0800