Public bug reported:

Lines or flickers occur in upper half of the screen while playing
videos(1080p).I think some frames are being dropped. Had the same
problem with Ubuntu 18.04. I think this is some issue with Intel HD
Graphics drivers in the system.Ready to do any follow up procedures.

Earlier when I used Ubuntu 16.04 there was no such problem.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.4
Architecture: amd64
CasperMD5CheckResult: skip
CompositorRunning: None
Date: Mon Aug  3 16:24:16 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation Skylake GT2 [HD Graphics 520] [8086:1916] (rev 07) (prog-if 
00 [VGA controller])
   Subsystem: Hewlett-Packard Company Skylake GT2 [HD Graphics 520] [103c:81ec]
   Subsystem: Hewlett-Packard Company Sun XT [Radeon HD 8670A/8670M/8690M / R5 
M330 / M430 / Radeon 520 Mobile] [103c:81ec]
InstallationDate: Installed on 2020-07-31 (3 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 003: ID 04f2:b56c Chicony Electronics Co., Ltd HP TrueVision HD
 Bus 001 Device 002: ID 0bda:b008 Realtek Semiconductor Corp. Bluetooth Radio 
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: HP HP Notebook
ProcEnviron:
 LANGUAGE=en_IN:en
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_IN
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-42-generic 
root=UUID=d981cf87-c80a-4e9c-b4a1-e2c2073a35ed ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/01/2016
dmi.bios.vendor: Insyde
dmi.bios.version: F.14
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 81EC
dmi.board.vendor: HP
dmi.board.version: 61.30
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnInsyde:bvrF.14:bd08/01/2016:svnHP:pnHPNotebook:pvrType1ProductConfigId:rvnHP:rn81EC:rvr61.30:cvnHP:ct10:cvrChassisVersion:
dmi.product.family: 103C_5335KV G=N L=CON B=HP
dmi.product.name: HP Notebook
dmi.product.sku: Z1D92PA#ACJ
dmi.product.version: Type1ProductConfigId
dmi.sys.vendor: HP
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.8-0ubuntu1~20.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.2
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

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal ubuntu

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https://bugs.launchpad.net/bugs/1890135

Title:
  LInes/Flickers occur in upper half of the screen.

Status in xorg package in Ubuntu:
  New

Bug description:
  Lines or flickers occur in upper half of the screen while playing
  videos(1080p).I think some frames are being dropped. Had the same
  problem with Ubuntu 18.04. I think this is some issue with Intel HD
  Graphics drivers in the system.Ready to do any follow up procedures.

  Earlier when I used Ubuntu 16.04 there was no such problem.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: xorg 1:7.7+19ubuntu14
  ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
  Uname: Linux 5.4.0-42-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.4
  Architecture: amd64
  CasperMD5CheckResult: skip
  CompositorRunning: None
  Date: Mon Aug  3 16:24:16 2020
  DistUpgraded: Fresh install
  DistroCodename: focal
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Intel Corporation Skylake GT2 [HD Graphics 520] [8086:1916] (rev 07) 
(prog-if 00 [VGA controller])
     Subsystem: Hewlett-Packard Company Skylake GT2 [HD Graphics 520] 
[103c:81ec]
     Subsystem: Hewlett-Packard Company Sun XT [Radeon HD 8670A/8670M/8690M / 
R5 M330 / M430 / Radeon 520 Mobile] [103c:81ec]
  InstallationDate: Installed on 2020-07-31 (3 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 04f2:b56c Chicony Electronics Co., Ltd HP TrueVision 
HD
   Bus 001 Device 002: ID 0bda:b008 Realtek Semiconductor Corp. Bluetooth Radio 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: HP HP Notebook
  ProcEnviron:
   LANGUAGE=en_IN:en
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_IN
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-42-generic 
root=UUID=d981cf87-c80a-4e9c-b4a1-e2c2073a35ed ro quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/01/2016
  dmi.bios.vendor: Insyde
  dmi.bios.version: F.14
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: 81EC
  dmi.board.vendor: HP
  dmi.board.version: 61.30
  dmi.chassis.asset.tag: Chassis Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: HP
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnInsyde:bvrF.14:bd08/01/2016:svnHP:pnHPNotebook:pvrType1ProductConfigId:rvnHP:rn81EC:rvr61.30:cvnHP:ct10:cvrChassisVersion:
  dmi.product.family: 103C_5335KV G=N L=CON B=HP
  dmi.product.name: HP Notebook
  dmi.product.sku: Z1D92PA#ACJ
  dmi.product.version: Type1ProductConfigId
  dmi.sys.vendor: HP
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.101-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.8-0ubuntu1~20.04.1
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.2
  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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