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https://bugs.launchpad.net/bugs/2077266

Title:
  Blank screen hang on bootup with Ryzen 7840U iGPU with Noble

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  TLDR - Looks like the amdgpu module is included in the Jammy kernel
  images but not in Noble.

  Hello!

  I have a laptop with the AMD Ryzen 7840U CPU which has a 780M iGPU
  running both Jammy-based and Noble-based distro elementary OS
  releases.

  This issue occurs only with the Noble and not Jammy edition.

  Upon bootup with the "quiet splash" params there is just a blank
  screen and apparent hang which is prevented if I remove the "splash"
  option and then I get the expected login screen just fine.

  Note that I ran the following command on both Jammy and Noble:

  sudo lsinitramfs /boot/initrd-6.8xxxxx | grep amdgpu

  And I see the amdgpu module is present in the Jammy image but not the
  Noble image.

  So I appended "amdgpu" to the /etc/initramfs-tools/modules file and
  did:

  sudo update-initramfs -uk all

  Which resolves the issue for me with Noble as well.

  Note both my Jammy and Noble installs are on the same kernel version
  currently 6.8-xxx-40 although the amdgpu module is included in the
  Jammy image but not the Noble one.

  Thank you!

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