[Bug 2119012] Re: Ubuntu Studio CD image build failure

[Juerg Haefliger]

dediff for plucky

** Description changed:

  Ubuntu Studio uses the lowlatency kernel. With 6.14, the lowlatency
  kernel is just the generic kernel with some bootargs to make it
  lowlatency. This breaks the Ubuntu Studio livefs and CD image builds.
  
  https://launchpad.net/~ubuntu-cdimage/+livefs/ubuntu/noble/ubuntustudio
  
  Problem 1)
  
  The postinst hook of the lowlatency-kernel package calls update-grub
  unconditionally which fails if the package is installed in a chroot.
  
  From a livefs build log:
  
  Processing triggers for dbus (1.14.10-4ubuntu4.1) ...
  Processing triggers for libgtk-3-0t64:amd64 (3.24.41-4ubuntu1.3) ...
  Processing triggers for shared-mime-info (2.4-4) ...
  Processing triggers for libgtk2.0-0t64:amd64 (2.24.33-4ubuntu1.1) ...
  Processing triggers for desktop-file-utils (0.27-2build1) ...
  Processing triggers for initramfs-tools (0.142ubuntu25.5) ...
  Processing triggers for hicolor-icon-theme (0.17-2) ...
  Processing triggers for libc-bin (2.39-0ubuntu8.5) ...
  Processing triggers for man-db (2.12.0-4build2) ...
  Processing triggers for dictionaries-common (1.29.7) ...
  Processing triggers for linux-image-6.14.0-24-generic (6.14.0-24.24~24.04.3) ...
  /etc/kernel/postinst.d/initramfs-tools:
  update-initramfs: Generating /boot/initrd.img-6.14.0-24-generic
  cryptsetup: ERROR: Couldn't resolve device overlay
  cryptsetup: WARNING: Couldn't determine root device
  cryptsetup: ERROR: Couldn't resolve device /dev/vdb
  Errors were encountered while processing:
   lowlatency-kernel
+ 
+ Problem 2)
+ 
+ The kernel flavor name changed from 'lowlatency' to 'generic'. This
+ breaks livecd-rootfs.

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

** Patch added: "lowlatency-kernel_1.3.debdiff"
   https://bugs.launchpad.net/ubuntu/+source/livecd-rootfs/+bug/2119012/+attachment/5894868/+files/lowlatency-kernel_1.3.debdiff

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https://bugs.launchpad.net/bugs/2119012

Title:
  Ubuntu Studio CD image build failure

Status in livecd-rootfs package in Ubuntu:
  New
Status in lowlatency-kernel package in Ubuntu:
  New
Status in livecd-rootfs source package in Noble:
  New
Status in lowlatency-kernel source package in Noble:
  New
Status in livecd-rootfs source package in Plucky:
  New
Status in lowlatency-kernel source package in Plucky:
  New
Status in livecd-rootfs source package in Questing:
  New
Status in lowlatency-kernel source package in Questing:
  New

Bug description:
  Ubuntu Studio uses the lowlatency kernel. With 6.14, the lowlatency
  kernel is just the generic kernel with some bootargs to make it
  lowlatency. This breaks the Ubuntu Studio livefs and CD image builds.

  https://launchpad.net/~ubuntu-
  cdimage/+livefs/ubuntu/noble/ubuntustudio

  Problem 1)

  The postinst hook of the lowlatency-kernel package calls update-grub
  unconditionally which fails if the package is installed in a chroot.

  From a livefs build log:

  Processing triggers for dbus (1.14.10-4ubuntu4.1) ...
  Processing triggers for libgtk-3-0t64:amd64 (3.24.41-4ubuntu1.3) ...
  Processing triggers for shared-mime-info (2.4-4) ...
  Processing triggers for libgtk2.0-0t64:amd64 (2.24.33-4ubuntu1.1) ...
  Processing triggers for desktop-file-utils (0.27-2build1) ...
  Processing triggers for initramfs-tools (0.142ubuntu25.5) ...
  Processing triggers for hicolor-icon-theme (0.17-2) ...
  Processing triggers for libc-bin (2.39-0ubuntu8.5) ...
  Processing triggers for man-db (2.12.0-4build2) ...
  Processing triggers for dictionaries-common (1.29.7) ...
  Processing triggers for linux-image-6.14.0-24-generic (6.14.0-24.24~24.04.3) ...
  /etc/kernel/postinst.d/initramfs-tools:
  update-initramfs: Generating /boot/initrd.img-6.14.0-24-generic
  cryptsetup: ERROR: Couldn't resolve device overlay
  cryptsetup: WARNING: Couldn't determine root device
  cryptsetup: ERROR: Couldn't resolve device /dev/vdb
  Errors were encountered while processing:
   lowlatency-kernel

  Problem 2)

  The kernel flavor name changed from 'lowlatency' to 'generic'. This
  breaks livecd-rootfs.

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