Upon doing the first command you suggested, after a reboot, the PC screen
turned on and off a few times and now the screen is just black. I'm
force-rebooting the PC now and seeing if I'll regain the image on my screen.

On Sun, Apr 7, 2019, 10:00 PM Daniel van Vugt <email address hidden>
wrote:

> That's good news.
>
> Now please try these while the image is open:
>
>   xrandr --output DVI-I-1 --set "dithering mode" "off"
>
> or
>
>   xrandr --output DVI-I-1 --set "dithering mode" "static 2x2"
>
> and change 'DVI-I-1' if you are using a different connector now.
>
> ** Changed in: linux (Ubuntu)
>        Status: Confirmed => Incomplete
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1819023
>
> Title:
>   [nouveau] Scrolling screen flicker, especially on default Ubuntu lock
>   screen
>
> Status in linux package in Ubuntu:
>   Incomplete
>
> Bug description:
>   My screen is experiencing a weird "scrolling" flicker, especially
>   while displaying blue, indigo, and violet hues/colors, such as on the
>   default Ubuntu 18.10 (x64 Desktop) lock screen. The screen flicker
>   scrolls up and down, with the brightest part of the flicker being
>   towards the top, with a gradient that fades back to the original color
>   near the bottom.
>
>   Problem occurs on any one monitor on any one video output protocol
>   (DVI-D, HDMI, and VGA).
>
>
>   I will upload an illustration or render as soon as possible for better
> explanation.
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 18.10
>   Package: xorg 1:7.7+19ubuntu8
>   ProcVersionSignature: Ubuntu 4.18.0-16.17-generic 4.18.20
>   Uname: Linux 4.18.0-16-generic x86_64
>   ApportVersion: 2.20.10-0ubuntu13.2
>   Architecture: amd64
>   BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
>   CompositorRunning: None
>   CurrentDesktop: ubuntu:GNOME
>   Date: Thu Mar  7 10:39:50 2019
>   DistUpgraded: 2018-10-19 10:50:54,557 ERROR got error from
> PostInstallScript ./xorg_fix_proprietary.py (g-exec-error-quark: Failed to
> execute child process “./xorg_fix_proprietary.py” (No such file or
> directory) (8))
>   DistroCodename: cosmic
>   DistroVariant: ubuntu
>   ExtraDebuggingInterest: Yes, if not too technical
>   GraphicsCard:
>    NVIDIA Corporation GF108 [GeForce GT 440] [10de:0de0] (rev a1) (prog-if
> 00 [VGA controller])
>      Subsystem: NVIDIA Corporation GF108 [GeForce GT 440] [10de:0828]
>   InstallationDate: Installed on 2018-08-17 (202 days ago)
>   InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64
> (20180426)
>   MachineType: BIOSTAR Group A880G+
>   ProcEnviron:
>    PATH=(custom, no user)
>    XDG_RUNTIME_DIR=<set>
>    LANG=en_US.UTF-8
>    SHELL=/bin/bash
>   ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-16-generic
> root=UUID=a967adb1-1600-455b-8704-e2bf5de5081d ro quiet splash vt.handoff=1
>   SourcePackage: xorg
>   UpgradeStatus: Upgraded to cosmic on 2018-10-19 (139 days ago)
>   dmi.bios.date: 09/21/2011
>   dmi.bios.vendor: American Megatrends Inc.
>   dmi.bios.version: 080016
>   dmi.board.asset.tag: To Be Filled By O.E.M.
>   dmi.board.name: A880G+
>   dmi.board.vendor: BIOSTAR Group
>   dmi.chassis.asset.tag: None
>   dmi.chassis.type: 3
>   dmi.chassis.vendor: BIOSTAR Group
>   dmi.modalias:
> dmi:bvnAmericanMegatrendsInc.:bvr080016:bd09/21/2011:svnBIOSTARGroup:pnA880G+:pvr:rvnBIOSTARGroup:rnA880G+:rvr:cvnBIOSTARGroup:ct3:cvr:
>   dmi.product.family: To Be Filled By O.E.M.
>   dmi.product.name: A880G+
>   dmi.product.sku: To Be Filled By O.E.M.
>   dmi.sys.vendor: BIOSTAR Group
>   version.compiz: compiz N/A
>   version.libdrm2: libdrm2 2.4.95-1
>   version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.2-0ubuntu1
>   version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.2-0ubuntu1
>   version.xserver-xorg-core: xserver-xorg-core 2:1.20.1-3ubuntu2.1
>   version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
>   version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.1.0-1
>   version.xserver-xorg-video-intel: xserver-xorg-video-intel
> 2:2.99.917+git20171229-1ubuntu1
>   version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-3
>
> To manage notifications about this bug go to:
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>