I also have an AMD CPU and I'm using the iGPU, in case that's related.

I'm able to boot with 'quiet splash' if I add 'nomodeset', but then have
to use a single screen at low res.

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https://bugs.launchpad.net/bugs/2061295

Title:
  No graphical boot with default Kubuntu 24.04

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I upgraded from 23.10 to 24.04, and with it the new 6.8 kernel. I do
  not see the Kubuntu EFI logo, and the system never reaches the sddm
  login screen. I could not switch to a tty to login either. If I boot
  kernel 6.5 it works as expected.

  If I remove "quiet splash" from the boot parameters, then kernel 6.8
  also boots.

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: linux-image-6.8.0-22-generic 6.8.0-22.22
  ProcVersionSignature: Ubuntu 6.8.0-22.22-generic 6.8.1
  Uname: Linux 6.8.0-22-generic x86_64
  ApportVersion: 2.28.0-0ubuntu1
  Architecture: amd64
  CRDA: N/A
  CasperMD5CheckResult: pass
  CurrentDesktop: KDE
  Date: Sun Apr 14 16:08:22 2024
  InstallationDate: Installed on 2023-01-16 (454 days ago)
  InstallationMedia: Kubuntu 23.04 "Lunar Lobster" - Alpha amd64 (20230115)
  MachineType: ASRock B650E PG Riptide WiFi
  ProcFB: 0 amdgpudrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-22-generic 
root=UUID=5863f9c0-ef4f-497e-81f5-12268da1003b ro
  RelatedPackageVersions:
   linux-restricted-modules-6.8.0-22-generic N/A
   linux-backports-modules-6.8.0-22-generic  N/A
   linux-firmware                            20240318.git3b128b60-0ubuntu2
  SourcePackage: linux
  UpgradeStatus: Upgraded to noble on 2024-04-13 (1 days ago)
  dmi.bios.date: 03/01/2024
  dmi.bios.release: 5.32
  dmi.bios.vendor: American Megatrends International, LLC.
  dmi.bios.version: 2.08
  dmi.board.asset.tag: Default string
  dmi.board.name: B650E PG Riptide WiFi
  dmi.board.vendor: ASRock
  dmi.board.version: Default string
  dmi.chassis.asset.tag: Default string
  dmi.chassis.type: 3
  dmi.chassis.vendor: Default string
  dmi.chassis.version: Default string
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInternational,LLC.:bvr2.08:bd03/01/2024:br5.32:svnASRock:pnB650EPGRiptideWiFi:pvrDefaultstring:rvnASRock:rnB650EPGRiptideWiFi:rvrDefaultstring:cvnDefaultstring:ct3:cvrDefaultstring:skuDefaultstring:
  dmi.product.family: Default string
  dmi.product.name: B650E PG Riptide WiFi
  dmi.product.sku: Default string
  dmi.product.version: Default string
  dmi.sys.vendor: ASRock

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