[Bug 1884915] Re: ubuntustudio-default-settings recommends linux-lowlatency thus breaking ubuntustudio focal image building

[Dimitri John Ledkov]

** Also affects: livecd-rootfs (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: live-build (Ubuntu)
   Importance: Undecided
       Status: New

** Description changed:

  ubuntustudio-default-settings recommends linux-lowlatency thus breaking
  ubuntustudio focal image building
  
  $ reverse-depends linux-lowlatency
  Reverse-Recommends
  * ubuntustudio-lowlatency-settings
  
  Reverse-Depends
  * linux-lowlatency-hwe-18.04 [amd64]
  * linux-lowlatency-hwe-18.04-edge [amd64]
  
  Packages without architectures listed are reverse-dependencies in:
  amd64, arm64, armhf, i386, ppc64el, s390x
  
- 
- Seeded packages in the Ubuntu archive must not depend on the linux kernel. Installation, and defaultness of a kernel flavour must be handled externally using livecd-rootfs kernel flavour picking, or some other dynamic configuration.
+ Seeded packages in the Ubuntu archive must not depend on the linux
+ kernel. Installation, and defaultness of a kernel flavour must be
+ handled externally using livecd-rootfs kernel flavour picking, or some
+ other dynamic configuration.
  
  The above resulted in transitevely linux-lowlatency packages getting
  pulled into the ubuntustudio task, without a blacklist. Which means that
  ABI encoded packages gain Task: ubuntustudio-desktop, and instead of
  only installing/tracking the latest kernel, the ancient
  5.4.0-16-lowlatency abi is also installed, and then production of daily
  focal isos fails, as there are two lowlatency kernels on the media.
  
  $ reverse-depends linux-lowlatency
  Reverse-Recommends
  * ubuntustudio-lowlatency-settings
  
  Reverse-Depends
  * linux-lowlatency-hwe-18.04 [amd64]
  * linux-lowlatency-hwe-18.04-edge [amd64]
  
  Packages without architectures listed are reverse-dependencies in:
  amd64, arm64, armhf, i386, ppc64el, s390x
  
  $ apt-cache show -a linux*lowlatency | grep -e Package -e Task
  ...
  Package: linux-headers-5.4.0-26-lowlatency
  Task: ubuntustudio-desktop
  ...
  
  If the dependency is desired, that is ok, as long as the abi encoded
  packages are blacklisted in the seed similar to the !linux-image-*
  stanza.
+ 
+ 
+ see https://launchpad.net/~ubuntu-cdimage/+livefs/ubuntu/focal/ubuntustudio/

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https://bugs.launchpad.net/bugs/1884915

Title:
  ubuntustudio-default-settings recommends linux-lowlatency thus
  breaking ubuntustudio focal image building

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