** Changed in: marco (Ubuntu)
       Status: Confirmed => Invalid

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https://bugs.launchpad.net/bugs/1882525

Title:
  [amdgpu] MATE desktop is corrupted upon login on Ryzen APU

Status in marco package in Ubuntu:
  Invalid
Status in mesa package in Ubuntu:
  Confirmed
Status in xorg-server package in Ubuntu:
  Confirmed
Status in xserver-xorg-video-amdgpu package in Ubuntu:
  Confirmed

Bug description:
  Today I upgraded from Ubuntu MATE 19.10 to 20.04. After doing so, Ubuntu 
boots normally to the display manager (login screen) as expected. But once I 
log in, everything on the screen is cut up into horizontal slices, with each 
slice offset farther right than the slice above, and squares of random colors 
running diagonally across the screen. I've attached a picture of my monitor 
showing the issue for reference.
  My hardware is a home-built PC with an ASUS Prime B450M motherboard, a Ryzen 
3 2200G APU, and using that APU's integrated graphics.
  In terms of software I'm running Ubuntu 20.04, which I just upgraded to and 
did a software update on. I have Linux 5.4.0-33-generic, X.Org 1.20.8, and Mesa 
20.0.4. Before I upgraded Ubuntu, I was affected by Bug #1880041 but it seems 
fixed in the new kernel. I don't believe they're related but I figure it's 
worth mentioning.
  I tried adding the nomodeset kernel option at boot, and it's an effective 
workaround. Also, I tried booting from an Ubuntu Mate 20.04 live USB to see if 
this was caused by some quirk of my particular software setup, and successfully 
reproduced the bug, proving it wasn't.
  If you'd like me to, I can provide log files, system information, etc. or 
help narrow it down by testing workarounds.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: xserver-xorg-core 2:1.20.8-2ubuntu2.1
  ProcVersionSignature: Ubuntu 5.4.0-33.37-generic 5.4.34
  Uname: Linux 5.4.0-33-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.2
  Architecture: amd64
  CasperMD5CheckResult: skip
  CompositorRunning: None
  Date: Mon Jun  8 06:41:47 2020
  DistUpgraded: Fresh install
  DistroCodename: focal
  DistroVariant: ubuntu
  ExecutablePath: /usr/lib/xorg/Xorg
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Advanced Micro Devices, Inc. [AMD/ATI] Raven Ridge [Radeon Vega Series / 
Radeon Vega Mobile Series] [1002:15dd] (rev c8) (prog-if 00 [VGA controller])
     Subsystem: ASUSTeK Computer Inc. Raven Ridge [Radeon Vega Series / Radeon 
Vega Mobile Series] [1043:876b]
  InstallationDate: Installed on 2019-10-20 (231 days ago)
  InstallationMedia: Ubuntu-MATE 19.10 "Eoan Ermine" - Release amd64 (20191017)
  MachineType: System manufacturer System Product Name
  ProcEnviron: PATH=(custom, no user)
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-33-generic 
root=UUID=43189257-cc94-4e98-ac1d-e16336dd152e ro quiet splash vt.handoff=7
  SourcePackage: xorg-server
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/13/2019
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 2006
  dmi.board.asset.tag: Default string
  dmi.board.name: PRIME B450M-A
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Default string
  dmi.chassis.type: 3
  dmi.chassis.vendor: Default string
  dmi.chassis.version: Default string
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr2006:bd11/13/2019:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnPRIMEB450M-A:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:
  dmi.product.family: To be filled by O.E.M.
  dmi.product.name: System Product Name
  dmi.product.sku: SKU
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer
  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 
2:2.99.917+git20200226-1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

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