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[Daniel van Vugt <1941795@xxxxxxxxxxxxxxxxxx>]

Thank you for reporting this bug to Ubuntu.

Ubuntu 20.04 (focal) reached end-of-standard-support in May 2025.

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** Changed in: mutter (Ubuntu)
       Status: New => Won't Fix

** Changed in: xserver-xorg-video-amdgpu (Ubuntu)
       Status: New => Won't Fix

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https://bugs.launchpad.net/bugs/1941795

Title:
  Only half of MST tiled display is visible after boot or sleep

Status in mutter package in Ubuntu:
  Won't Fix
Status in xserver-xorg-video-amdgpu package in Ubuntu:
  Won't Fix

Bug description:
  Only left half of a 4K display in MST mode visible after sleep. The
  same problem often appears after boot as well. Changing mode to any
  arbitrary resolution and reverting back resolves the problem.

  Display Asus PQ321qe

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: xorg 1:7.7+19ubuntu14
  ProcVersionSignature: Ubuntu 5.11.0-25.27~20.04.1-generic 5.11.22
  Uname: Linux 5.11.0-25-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.18
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CasperMD5CheckResult: skip
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Aug 26 21:47:12 2021
  DistUpgraded: Fresh install
  DistroCodename: focal
  DistroVariant: ubuntu
  DkmsStatus:
   lttng-modules, 2.12.5, 5.11.0-25-generic, x86_64: installed
   lttng-modules, 2.12.5, 5.11.0-27-generic, x86_64: installed
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Subsystem: Gigabyte Technology Co., Ltd UHD Graphics 630 (Desktop 9 Series) [1458:d000]
   Advanced Micro Devices, Inc. [AMD/ATI] Vega 10 XL/XT [Radeon RX Vega 56/64] [1002:687f] (rev c0) (prog-if 00 [VGA controller])
     Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] RX Vega64 [1002:0b36]
  InstallationDate: Installed on 2021-05-27 (90 days ago)
  InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
  MachineType: Gigabyte Technology Co., Ltd. Z390 AORUS PRO WIFI
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-25-generic root=UUID=a46531ab-2bd9-4b9c-a1c1-f3a83760a66c ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/19/2021
  dmi.bios.release: 5.13
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F12k
  dmi.board.asset.tag: Default string
  dmi.board.name: Z390 AORUS PRO WIFI-CF
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.asset.tag: Default string
  dmi.chassis.type: 3
  dmi.chassis.vendor: Default string
  dmi.chassis.version: Default string
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF12k:bd01/19/2021:br5.13:svnGigabyteTechnologyCo.,Ltd.:pnZ390AORUSPROWIFI:pvrDefaultstring:rvnGigabyteTechnologyCo.,Ltd.:rnZ390AORUSPROWIFI-CF:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring:
  dmi.product.family: Default string
  dmi.product.name: Z390 AORUS PRO WIFI
  dmi.product.sku: Default string
  dmi.product.version: Default string
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.102-1ubuntu1~20.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri 20.2.6-0ubuntu0.20.04.1
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.9-2ubuntu1.2~20.04.2
  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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