I have found something that changes the state of the flickering. I tried to
plug in a thunderbolt to hdmi display and while the machine didn't output
to the display, the flickering stopped. I found that if I plugged in the
display while flickering was occurring the flickering would stop and once I
unplugged the device the flickering would begin again.

On Tue, Aug 13, 2019 at 8:30 PM Daniel van Vugt <
<email address hidden>> wrote:

> ** Changed in: linux (Ubuntu)
>        Status: Incomplete => Confirmed
>
> ** Summary changed:
>
> - Excessive screen tearing and flickering
> + Excessive screen tearing and flickering on Asus ZenBook S UX391UA
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1839253
>
> Title:
>   Excessive screen tearing and flickering on Asus ZenBook S UX391UA
>
> Status in linux package in Ubuntu:
>   Confirmed
>
> Bug description:
>   I am experiencing a large amount of screen tearing flickering and
>   artifacting. I've tried the common fix that is suggested on
>   askubuntu.com which is editing the file /etc/X11/xorg.conf.d/20-intel-
>   graphics.conf and this has not changed anything.
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 19.04
>   Package: xorg 1:7.7+19ubuntu12
>   ProcVersionSignature: Ubuntu 5.0.0-23.24-generic 5.0.15
>   Uname: Linux 5.0.0-23-generic x86_64
>   ApportVersion: 2.20.10-0ubuntu27.1
>   Architecture: amd64
>   BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
>   CompositorRunning: None
>   CurrentDesktop: ubuntu:GNOME
>   Date: Wed Aug  7 02:06:01 2019
>   DistUpgraded: Fresh install
>   DistroCodename: disco
>   DistroVariant: ubuntu
>   ExtraDebuggingInterest: Yes
>   GraphicsCard:
>    Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) (prog-if 00
> [VGA controller])
>      Subsystem: ASUSTeK Computer Inc. UHD Graphics 620 [1043:10a1]
>   InstallationDate: Installed on 2019-08-06 (1 days ago)
>   InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
>   Lsusb:
>    Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
>    Bus 001 Device 004: ID 27c6:5201
>    Bus 001 Device 003: ID 8087:0a2b Intel Corp.
>    Bus 001 Device 002: ID 13d3:56b9 IMC Networks
>    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>   MachineType: ASUSTeK COMPUTER INC. ZenBook S UX391UA
>   ProcEnviron:
>    TERM=xterm-256color
>    PATH=(custom, no user)
>    XDG_RUNTIME_DIR=<set>
>    LANG=en_US.UTF-8
>    SHELL=/bin/bash
>   ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-23-generic
> root=UUID=6c2ff7ef-a93b-47fe-ae85-a60f10a4201f ro quiet splash vt.handoff=1
>   SourcePackage: xorg
>   UpgradeStatus: No upgrade log present (probably fresh install)
>   dmi.bios.date: 05/18/2018
>   dmi.bios.vendor: American Megatrends Inc.
>   dmi.bios.version: UX391UA.204
>   dmi.board.asset.tag: ATN12345678901234567
>   dmi.board.name: UX391UA
>   dmi.board.vendor: ASUSTeK COMPUTER INC.
>   dmi.board.version: 1.0
>   dmi.chassis.asset.tag: No Asset Tag
>   dmi.chassis.type: 10
>   dmi.chassis.vendor: ASUSTeK COMPUTER INC.
>   dmi.chassis.version: 1.0
>   dmi.modalias:
> dmi:bvnAmericanMegatrendsInc.:bvrUX391UA.204:bd05/18/2018:svnASUSTeKCOMPUTERINC.:pnZenBookSUX391UA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX391UA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
>   dmi.product.family: ZenBook S
>   dmi.product.name: ZenBook S UX391UA
>   dmi.product.version: 1.0
>   dmi.sys.vendor: ASUSTeK COMPUTER INC.
>   version.compiz: compiz N/A
>   version.libdrm2: libdrm2 2.4.97-1ubuntu1
>   version.libgl1-mesa-dri: libgl1-mesa-dri 19.0.2-1ubuntu1.1
>   version.libgl1-mesa-glx: libgl1-mesa-glx N/A
>   version.xserver-xorg-core: xserver-xorg-core 2:1.20.4-1ubuntu3
>   version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
>   version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.0.1-0ubuntu1
>   version.xserver-xorg-video-intel: xserver-xorg-video-intel
> 2:2.99.917+git20180925-2
>   version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1839253/+subscriptions
>