** Summary changed:

- [Ice Lake] 2-second black screen blips when using Chrome or gnome-screenshot
+ [Ice Lake] 2-second black screen blips when using Chrome or gnome-screenshot 
in kernel 5.4, but 5.5.19 has no problem

** No longer affects: mutter (Ubuntu)

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https://bugs.launchpad.net/bugs/1874010

Title:
  [Ice Lake] 2-second black screen blips when using Chrome or gnome-
  screenshot in kernel 5.4, but 5.5.19 has no problem

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Hi,

  Im using a HP 14s dq laptop with intel 630 graphics.

  I've tried both the mode setting and xserver-xorg-video-intel drivers,
  both result in the same 2-second black screen blips. The happens
  frequently using chrome, and always when using the gnome screenshot
  utility. Also, during boot teh screen flickers between black screen
  and boot splash a lot.

  setting nomodeset as a grub parameter stops the flickering, but is not
  a feasible solution as brightness can no longer be set.

  kind regards,

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: xorg 1:7.7+19ubuntu14
  ProcVersionSignature: Ubuntu 5.4.0-25.29-generic 5.4.30
  Uname: Linux 5.4.0-25-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CasperMD5CheckResult: skip
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Apr 21 08:15:51 2020
  DistUpgraded: Fresh install
  DistroCodename: focal
  DistroVariant: ubuntu
  DkmsStatus:
   rtl8821ce, 5.5.2.1, 5.4.0-21-generic, x86_64: installed
   rtl8821ce, 5.5.2.1, 5.4.0-24-generic, x86_64: installed
   rtl8821ce, 5.5.2.1, 5.4.0-25-generic, x86_64: installed
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Intel Corporation Device [8086:8a56] (rev 07) (prog-if 00 [VGA controller])
     Subsystem: Hewlett-Packard Company Device [103c:86c8]
  InstallationDate: Installed on 2020-04-16 (4 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 002: ID 0408:5365 Quanta Computer, Inc. HP TrueVision HD 
Camera
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Lsusb-t:
   /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 10000M
   /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/12p, 480M
       |__ Port 3: Dev 2, If 0, Class=Video, Driver=uvcvideo, 480M
       |__ Port 3: Dev 2, If 1, Class=Video, Driver=uvcvideo, 480M
  MachineType: HP HP Laptop 14s-dq1xxx
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-25-generic 
root=UUID=54a7cc42-ac04-4466-b29f-16b1a7016ed0 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/20/2019
  dmi.bios.vendor: AMI
  dmi.bios.version: F.09
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 86C8
  dmi.board.vendor: HP
  dmi.board.version: 56.31
  dmi.chassis.type: 10
  dmi.chassis.vendor: HP
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnAMI:bvrF.09:bd12/20/2019:svnHP:pnHPLaptop14s-dq1xxx:pvr:rvnHP:rn86C8:rvr56.31:cvnHP:ct10:cvrChassisVersion:
  dmi.product.family: 103C_5335KV HP Notebook
  dmi.product.name: HP Laptop 14s-dq1xxx
  dmi.product.sku: 8BL04EA#ABH
  dmi.sys.vendor: HP
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.101-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2
  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 N/A
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

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