** Tags added: amdgpu

** Summary changed:

- Screen flickers after waking up from suspend
+ [amdgpu] Screen flickers after waking up from suspend

** Package changed: xorg (Ubuntu) => xserver-xorg-video-amdgpu (Ubuntu)

** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

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  [amdgpu] Screen flickers after waking up from suspend

Status in linux package in Ubuntu:
Status in xserver-xorg-video-amdgpu package in Ubuntu:

Bug description:
  I upgraded my Ubuntu 20.04 system with a new graphics card a few days ago. 
Everything seems fine when running the system normally, however whenever I 
suspend the machine and then wake it back up, severe problems occur.
  The first time, the machine froze completely. Switching to a different TTY 
didn't work anymore and the keyboard LEDs didn't respond to caps and num lock 
anymore, so I had to force shutdown. The second time, it came back OK but the 
screen has been flickering heavily since. Restarting Gnome and unplugging and 
plugging monitors back in hasn't helped.

  Relevant specs:
  CPU: AMD® Ryzen 9 3900x 12-core processor × 24 
  GPU: AMD® Radeon rx 5600 xt (MSI RADEON RX 5600 XT MECH OC)
  Monitors: 1x Acer running at 3840x2160 60Hz, 2x Medion (showing up as 
"Messeltronik Dresden GmbH") both running at 1920x1080 60Hz.
  Gnome: 3.36.2
  Apt doesn't report any updates.

  The flickering is most pronounced on the Acer. On the Medions, it
  seems to only happen when something changes on the screen. I have
  tried to capture this on video: https://youtu.be/HWT1J76-x94

  This bug seem quite similar to this one 
(https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1874588). I can also stop 
the flickering by switching the Acer to 1080p but when switching back to 4k, 
the problem reappears.

  I hope that ubuntu-bug has included all the necessary details. Let me
  know if you need anything else.

  Thank you very much for your help!

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: xorg 1:7.7+19ubuntu14
  ProcVersionSignature: Ubuntu 5.4.0-39.43-generic 5.4.41
  Uname: Linux 5.4.0-39-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.3
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CasperMD5CheckResult: skip
  CompizPlugins: No value set for 
  CompositorRunning: None
  CurrentDesktop: GNOME
  Date: Sat Jun 27 10:44:32 2020
  DistUpgraded: 2020-04-30 20:17:33,403 DEBUG Running PostInstallScript: 
  DistroCodename: focal
  DistroVariant: ubuntu
   nvidia, 440.100, 5.4.0-37-generic, x86_64: installed
   nvidia, 440.100, 5.4.0-39-generic, x86_64: installed
  ExtraDebuggingInterest: Yes
   Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 [Radeon RX 5600 OEM/5600 XT / 
5700/5700 XT] [1002:731f] (rev ca) (prog-if 00 [VGA controller])
     Subsystem: Micro-Star International Co., Ltd. [MSI] Navi 10 [Radeon RX 
5600 OEM/5600 XT / 5700/5700 XT] [1462:381e]
  InstallationDate: Installed on 2019-03-26 (458 days ago)
  InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-39-generic 
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: Upgraded to focal on 2020-04-30 (57 days ago)
  dmi.bios.date: 04/08/2020
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P2.60
  dmi.board.name: X570 Extreme4
  dmi.board.vendor: ASRock
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.product.family: To Be Filled By O.E.M.
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.sku: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.101-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.4-2ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

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