[Bug 2127100] Re: [SRU] Fix kernel cmdline for Thor systems, drop incorrect chmod, block jammy do-release-upgrade

[Pierre Ducroquet]

** Patch added: "Patch for resolute with proper changelog"
   https://bugs.launchpad.net/ubuntu/+source/nvidia-tegra-defaults/+bug/2127100/+attachment/5927526/+files/resolute.debdiff

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https://bugs.launchpad.net/bugs/2127100

Title:
  [SRU] Fix kernel cmdline for Thor systems, drop incorrect chmod, block
  jammy do-release-upgrade

Status in nvidia-tegra-defaults package in Ubuntu:
  In Progress
Status in nvidia-tegra-defaults source package in Jammy:
  In Progress
Status in nvidia-tegra-defaults source package in Noble:
  In Progress
Status in nvidia-tegra-defaults source package in Plucky:
  In Progress
Status in nvidia-tegra-defaults source package in Questing:
  In Progress

Bug description:
  [ Impact ]

   * The new Thor platform require an additional kernel command line
  parameter to properly function. The nvidia-tegra-defaults is already
  responsible for some specific kernel cmdline setup, adding these here
  will enable this new hardware.

   * Noble will not be supported on Orin platforms initially, blocking
  do-release-upgrade will prevent people from bricking their systems

   * While implementing these fixes, we realized a chmod was pushed
  previously in postinst that shouldn't be there.

  [ Test Plan ]

   * First bug : booting a Thor platform without this patch is not
  possible if there is not another workaround implemented. Booting the
  board with a noble image including this package without any manual
  change of the kernel command line must work.

   * Second bug: launching do-release-upgrade on a Jammy Orin system
  offers an upgrade to Noble while this will end up breaking most
  advanced features. After installing this updated package, do-release-
  upgrade offers no upgrade.

  [ Where problems could occur ]

   * Thor platforms could still not work if these kernel parameters are
  not enough.

   * Orin platforms could still upgrade from Jammy to Noble while this
  path is not usable yet.

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