[Bug 1942260] Re: compress firmware in /lib/firmware

[Launchpad Bug Tracker]

This bug was fixed in the package linux-firmware -
20230731.git07f05b0c-0ubuntu1

---------------
linux-firmware (20230731.git07f05b0c-0ubuntu1) mantic; urgency=medium

  * Miscellaneous Ubuntu changes
    - [Packaging] Compress all firmware license files
    - [Packaging] Check for /usr/bin/python3 in clean rule
    - Rebase to upstream commit 07f05b0c9750b4e3302473244400668dab70a91e
      Rebase against git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
      - qcom: Add Audio firmware for SC8280XP X13s
      - iwlwifi: update cc/Qu/QuZ firmwares for core80-39 release
      - iwlwifi: add new FWs from core80-39 release
      - check_whence: Check link targets are valid
      - Fix qcom ASoC tglp WHENCE entry
      - linux-firmware: Update firmware file for Intel Bluetooth AX201
      - linux-firmware: Update firmware file for Intel Bluetooth AX200
      - linux-firmware: Update firmware file for Intel Bluetooth AX210
      - linux-firmware: Update firmware file for Intel Bluetooth AX211
      - linux-firmware: Update firmware file for Intel Bluetooth AX211
      - linux-firmware: Update firmware file for Intel Bluetooth AX203
      - linux-firmware: Update firmware file for Intel Bluetooth AX203
      - linux-firmware: update firmware for MT7922 WiFi device
      - linux-firmware: update firmware for mediatek bluetooth chip (MT7922)
      - Partially revert "amdgpu: DMCUB updates for DCN 3.1.4 and 3.1.5"
      - cirrus: Add CS35L41 firmware for ASUS ROG 2023 Models
      - i915: update to GuC 70.8.0 and HuC 8.5.1 for MTL
      - i915: update DG2 GuC to v70.8.0
      - mediatek: Update mt8195 SCP firmware to support 10bit mode
      - wfx: update to firmware 3.16.1
      - Updated NXP SR150 UWB firmware
      - amdgpu: update DMCUB to v0.0.175.0 for various AMDGPU ASICs
      - amdgpu: update Picasso VCN firmware
      - amdgpu: update raven2 VCN firmware
      - amdgpu: update raven VCN firmware
      - amdgpu: update renoir VCN firmware
      - amdgpu: update green sardine VCN firmware
      - linux-firmware: Update AMD cpu microcode
      - linux-firmware: Update AMD fam17h cpu microcode
      - amdgpu: add initial GC 11.0.3 firmware
      - amdgpu: add initial PSP 13.0.10 firmware
      - amdgpu: add initial SDMA 6.0.3 firmware
      - amdgpu: add initial SMU 13.0.10 firmware
      - amdgpu: update VCN 4.0.0 firmware
      - qcom: sc8280xp: LENOVO: Remove execute bits
      - qcom: sc8280xp: LENOVO: remove directory sym link
      - copy-firmware: Fix test: unexpected operator
      - copy-firmware: Fix linking directories when using compression
      - cirrus: Add CS35L41 firmware for Dell Oasis Models
      - i915: Update ADLP DMC to v2.20
      - i915: Update MTL DMC to v2.13
      - ice: add LAG-supporting DDP package
    - SAUCE: Also check WHENCE.ubuntu for files to not compress
    - [Packaging] build-package: Drop sanity check
  * compress firmware in /lib/firmware (LP: #1942260)
    - SAUCE: Support additional compressor options
    - [Packaging] Enable zstd firmware compression
  * upgrading does not defer initramfs updates (LP: #1926608)
    - [Packaging] Use dpkg-trigger for updating the initramfs

 -- Juerg Haefliger <juerg.haefliger at canonical.com>  Wed, 02 Aug 2023
15:26:20 +0200

** Changed in: linux-firmware (Ubuntu Mantic)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1942260

Title:
  compress firmware in /lib/firmware

Status in initramfs-tools package in Ubuntu:
  Fix Released
Status in linux-firmware package in Ubuntu:
  Fix Released
Status in linux-firmware-raspi2 package in Ubuntu:
  Confirmed
Status in initramfs-tools source package in Mantic:
  Fix Released
Status in linux-firmware source package in Mantic:
  Fix Released
Status in linux-firmware-raspi2 source package in Mantic:
  Confirmed

Bug description:
  -- initramfs-tools

  [Impact]

   * linux supports xz compressed linux-firmware which saves disk space.
  In focal, initramfs-tools only knows how to included uncompressed
  firmware files (even when kernel supports loading compressed ones).
  Newer releases of linux-firmware may use compressed firmware files
  only, in such cases it would be nice for focal's initramfs-tools to
  support compressed firmware files in case of partial or incomplete
  upgrades (i.e. linux-firmware force installed or upgraded, without
  newer initramfs-tools). The proposed changes to initramfs-tools are
  backwards and forwards compatible, they prefer to include uncompressed
  firmware files; and if missing, include compressed firmware files in
  their uncompressed form. Thus maintaining compatibility with any
  kernels, irrespective of compressed/uncompressed firmware inputs.

  [Test Plan]

   * Compress all files shipped by linux-firmware with xz

   * Rebuild initrd

   * Check that all the same firmware files are still included in the
  initramfs, in their uncompressed form as before

  [Where problems could occur]

   * This SRU is precautionary to prevent accidental installation of
  compressed linux-firmware from generating incorrect initramfs. It
  should be noted that whilst initramfs-tools would create a compatible
  initramfs with any kernels, pre-v5.3 kernels do not support xz
  compressed firmware files at runtime. Mixing this new initramfs with
  compressed firmwares and pre 5.3 kernels may lead to expectations of
  supporting compressed firmware files with them only working at initrd
  stage and not at runtime.

  [Other Info]
  Original bug report

  Some facts:
   - The linux kernel has supported loading xz compressed firmware since 5.3
   - The size of /lib/firmware in impish is ~650Mb (and growing)
   - The compressed size of firmware could be ~230Mb

  It would be nice to install compressed firmware to save space.

  Here are the plans from the Fedora project:
  https://fedoraproject.org/wiki/Changes/CompressKernelFirmware

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