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https://bugs.launchpad.net/bugs/2087528

Title:
  Don't compress binary deb packages

Status in linux-firmware package in Ubuntu:
  Fix Released
Status in linux-firmware source package in Noble:
  Fix Released
Status in linux-firmware source package in Oracular:
  Fix Released
Status in linux-firmware source package in Plucky:
  Fix Released

Bug description:
  [ Impact ]

  linux-firmware binary packages contain only compressed blobs. There's
  no need to (re-) compress the binary debian packages. In fact
  decompression at package installation time could cause problems which
  results in package installation failures.

  dpkg-deb (subproces): ZSTD_decompressStream error : Corrupted block
  detected

  [ Test Plan ]

  Download binary debian packages and inspect them.

  Uncompressed:
  $ file linux-firmware_20241107.gitdb0082fa-0ubuntu1_amd64.deb
  linux-firmware_20241107.gitdb0082fa-0ubuntu1_amd64.deb: Debian binary package 
(format 2.0), with control.tar  

  Compressed:
  $ file linux-firmware_20230915.gitdfa11466-0ubuntu1_amd64.deb
  linux-firmware_20230915.gitdfa11466-0ubuntu1_amd64.deb: Debian binary package 
(format 2.0), with control.tar.zst, data compression zst

  [ Where Problems Could Occur ]

  Problems would show up at package installation and/or upgrade time.

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