failed to build against linux-unstable=5.18.0-1.1: CONFIG_VIDEO_V4L2 obsoleted

[You-Sheng Yang]

In commit 9958d30f38b9 ("media: Kconfig: cleanup VIDEO_DEV dependencies"), VIDEO_V4L2 is now obsoleted and VIDEO_DEV should be used instead. This fails the added grep statement in bug 1964484 evaluates to empty as always, and BUILD_EXCLUSIVE_KERNEL is therefore always set on those should not. The error messages will be like:

II: dkms-build building v4l2loopback
Creating symlink /tmp/kernel-vicamo-ce1c8356cf164-8jMF/build/debian/build/build-generic/_________________________dkms/build/v4l2loopback/0.12.5/source -> /tmp/kernel-vicamo-ce1c8356cf164-8jMF/build/debian/build/build-generic/_________________________dkms/source/v4l2loopback-0.12.5
Error! The /tmp/kernel-vicamo-ce1c8356cf164-8jMF/build/debian/build/build-generic/_________________________dkms/build/v4l2loopback/0.12.5/5.18.0-2001-generic/x86_64/dkms.conf for module v4l2loopback includes a BUILD_EXCLUSIVE directive which does not match this kernel/arch.
This indicates that it should not be built.
debian/scripts/dkms-build: line 176: /tmp/kernel-vicamo-ce1c8356cf164-8jMF/build/debian/build/build-generic/_________________________dkms/build/v4l2loopback/0.12.5/build/make.log: No such file or directory
make: *** [debian/rules.d/2-binary-arch.mk:235: /tmp/kernel-vicamo-ce1c8356cf164-8jMF/build/debian/stamps/stamp-install-generic] Error 1

[You-Sheng Yang (vicamo)]

Tested:
$ dpkg -l|grep linux-headers-5|awk '{print $2}'
linux-headers-5.15.0-1005-kvm
linux-headers-5.15.0-28
linux-headers-5.15.0-28-generic
linux-headers-5.17.0-1003-oem
linux-headers-5.18.0-1-generic
$ dkms status
v4l2loopback/0.12.5, 5.15.0-28-generic, x86_64: installed
v4l2loopback/0.12.5, 5.17.0-1003-oem, x86_64: installed
v4l2loopback/0.12.5, 5.18.0-1-generic, x86_64: installed

Prebuilt PPA: https://launchpad.net/~vicamo/+archive/ubuntu/ppa-1970983

[You-Sheng Yang (vicamo)]

While we'll have 5.18 kernel in Jammy soon or later, also nominate for Jammy.

[You-Sheng Yang (vicamo)]

Need sponsor.

[You-Sheng Yang (vicamo)]

This would block https://bugs.launchpad.net/ubuntu/focal/+source/linux-oem-5.17/+bug/1969434.

[Launchpad Janitor (janitor)]

This bug was fixed in the package v4l2loopback - 0.12.5-1ubuntu6

---------------
v4l2loopback (0.12.5-1ubuntu6) kinetic; urgency=low

  * Check CONFIG_VIDEO_DEV against kernel version >= 5.18. (LP: #1970983)

 -- You-Sheng Yang <email address hidden> Tue, 03 May 2022 03:55:33 +0000

[Andi (keefer-a)]

Thanks, this fix in the PPA https://launchpad.net/~vicamo/+archive/ubuntu/ppa-1970983 works for me on Ubuntu 22.04 with kernel 5.18.x and 5.19.x

[Łukasz Zemczak (sil2100)]

Hello You-Sheng, or anyone else affected,

Accepted v4l2loopback into jammy-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/v4l2loopback/0.12.7-2ubuntu2~22.04.1 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, what testing has been performed on the package and change the tag from verification-needed-jammy to verification-done-jammy. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-jammy. 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.

[Kleber Sacilotto de Souza (kleber-souza)]

Verification in Jammy with kernels up to 5.19 done on bug 1999670.

[Launchpad Janitor (janitor)]

This bug was fixed in the package v4l2loopback - 0.12.7-2ubuntu2~22.04.1

---------------
v4l2loopback (0.12.7-2ubuntu2~22.04.1) jammy; urgency=medium

  * Backport dkms support for HWE kernels. LP: #1999670

v4l2loopback (0.12.7-2ubuntu2) kinetic; urgency=medium

  * Preserve CC setting when invoking sub-make, to ensure module can be
    built correctly with the kernel's custom compiler. Fixes FTBFS in
    hwe-5.19 build. LP: #1991664

v4l2loopback (0.12.7-2ubuntu1) kinetic; urgency=medium

  * Merge from Debian, remaining changes:
    - drop module-assistant autopkgtest
    - add Ubuntu patch track active-readers
    - add Ubuntu patch implement support for V4L2_EVENT_PRI_CLIENT_USAGE

v4l2loopback (0.12.7-2) unstable; urgency=medium

  * Fix DKMS build on linux>=5.18

v4l2loopback (0.12.7-1) unstable; urgency=medium

  * New upstream version 0.12.7

  [ Andreas Beckmann ]
  * Switch to dh-sequence-dkms.
  * Switch to Testsuite: autopkgtest-pkg-dkms.

  [ Debian Janitor ]
  * Set upstream metadata fields: Bug-Database, Bug-Submit, Repository,
    Repository-Browse.
  * Remove constraints unnecessary since buster

  [ IOhannes m zmölnig ]
  * Drop patches applied upstream
  * Drop unnecessary B-Ds
  * Bump dh-compat to 13
  * Bump standards version to 4.6.1

v4l2loopback (0.12.5-1ubuntu7) kinetic; urgency=medium

  * Drop obsolte REMAKE_INITRD option from dkms.conf.
  * Update module init & exit calls to use kernel provided macros, such
    that they gain correct IBT attributes. LP: #1980484

v4l2loopback (0.12.5-1ubuntu6) kinetic; urgency=low

  * Check CONFIG_VIDEO_DEV against kernel version >= 5.18. (LP: #1970983)

 -- Dimitri John Ledkov <email address hidden> Mon, 16 Jan 2023 11:22:08 +0000

[Łukasz Zemczak (sil2100)]

The verification of the Stable Release Update for v4l2loopback 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.