elhoir, if its actually true you personally were able to boot using the
RX470 without WORKAROUNDs, its possible that either when you are
installing older kernels you aren't installing the correct packages, or
you were mistaken and it only booted either with a WORKAROUND or when a
different graphics card was installed.

Unless the above may be confirmed, one is at the mercy of whomever has
your hardware to confirm a regression.

** Changed in: linux (Ubuntu)
       Status: Incomplete => Triaged

** Tags removed: regression-update
** Tags added: regression-potential

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https://bugs.launchpad.net/bugs/1818580

Title:
  [Medion MS-7616] [drm:amdgpu_init [amdgpu]] *ERROR* VGACON disables
  amdgpu kernel modesetting.

Status in linux package in Ubuntu:
  Triaged

Bug description:
  I cannot boot PC normally, i must use recovery mode.

  Full dmesg after modprobe'ing amdgpu demonstrating call trace and lead up:
  
https://launchpadlibrarian.net/414079136/complete-dmesg-after-modprobe-amdgpu.txt

  WORKAROUND: Use kernel parameter:
  nomodeset
  OR:
  modprobe.blacklist=amdgpu

  ProblemType: Bug
  DistroRelease: Ubuntu 19.04
  Package: xserver-xorg-video-amdgpu 18.1.99+git20190207-1
  ProcVersionSignature: Ubuntu 5.0.0-7.8-lowlatency 5.0.0
  Uname: Linux 5.0.0-7-lowlatency x86_64
  .tmp.unity_support_test.1:

  ApportVersion: 2.20.10-0ubuntu21
  Architecture: amd64
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: XFCE
  Date: Tue Mar  5 00:59:48 2019
  DistUpgraded: 2019-02-07 01:41:15,390 DEBUG Running PostInstallScript: 
'./xorg_fix_proprietary.py'
  DistroCodename: disco
  DistroVariant: ubuntu
  GraphicsCard:
   Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 
470/480/570/570X/580/580X] [1002:67df] (rev cf) (prog-if 00 [VGA controller])
     Subsystem: PC Partner Limited / Sapphire Technology Ellesmere [Radeon RX 
470/480/570/570X/580/580X/590] [174b:353e]
  InstallationDate: Installed on 2012-02-27 (2562 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  MachineType: MEDIONPC MS-7616
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-7-lowlatency 
root=UUID=cded073e-f845-4947-970b-f8a4290c4c2b ro quiet splash acpi_osi=Linux 
nomodeset crashkernel=384M-:128M crashkernel=384M-2G:128M,2G-:256M 
crashkernel=512M-:192M vt.handoff=1
  SourcePackage: xserver-xorg-video-amdgpu
  UpgradeStatus: Upgraded to disco on 2019-02-07 (25 days ago)
  dmi.bios.date: 01/15/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: A7616MLN.10F
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: MS-7616
  dmi.board.vendor: MEDIONPC
  dmi.board.version: 1.0
  dmi.chassis.type: 3
  dmi.chassis.vendor: MEDIONPC
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrA7616MLN.10F:bd01/15/2010:svnMEDIONPC:pnMS-7616:pvr1.0:rvnMEDIONPC:rnMS-7616:rvr1.0:cvnMEDIONPC:ct3:cvr:
  dmi.product.family: To Be Filled By O.E.M.
  dmi.product.name: MS-7616
  dmi.product.sku: To Be Filled By O.E.M.
  dmi.product.version: 1.0
  dmi.sys.vendor: MEDIONPC
  version.compiz: compiz 1:0.9.14.0+19.04.20190219-0ubuntu1
  version.libdrm2: libdrm2 2.4.97-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 18.3.4-1ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx 18.3.4-1ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.3-1ubuntu1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.1.99+git20190207-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20180925-2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

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