Public bug reported:

Default install  of Focal Fossa 20.04 Beta downloaded April 4, 2020.

Steps to Reproduce:
1. Open Settings
2. Navigate to Displays.
3. In Scale section, select `200%`
4. Click Apply
Expected behavior: Screens refresh with a 200% scale applied and a dialog to 
confirm.
Error encountered: Screens switch to "power saving mode" (go blank).  After 
about 15 seconds, they wake up in the original 100% scale mode.

Other notes:
I have done this successfully with 18.04 on the exact same hardware (different 
hard drive partitions) in the past after installing NVidia drivers.
I have successfully rearranged the monitors in Settings and changed the Primary 
Display in Settings with this install.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia wl
.proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory: 
'/proc/driver/nvidia/gpus/0000:01:00.0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.suspend: suspend hibernate resume
.proc.driver.nvidia.suspend_depth: default modeset uvm
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module  440.64  Fri Feb 21 01:17:26 
UTC 2020
 GCC version:  gcc version 9.3.0 (Ubuntu 9.3.0-8ubuntu1)
ApportVersion: 2.20.11-0ubuntu22
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr  5 10:09:14 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus:
 bcmwl, 6.30.223.271+bdcom, 5.4.0-21-generic, x86_64: installed
 nvidia, 440.64, 5.4.0-21-generic, x86_64: installed
ExtraDebuggingInterest: Yes, including running git bisection searches
GraphicsCard:
 NVIDIA Corporation TU106 [GeForce RTX 2070 Rev. A] [10de:1f07] (rev a1) 
(prog-if 00 [VGA controller])
   Subsystem: eVga.com. Corp. TU106 [GeForce RTX 2070 Rev. A] [3842:2173]
InstallationDate: Installed on 2020-04-05 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402)
MachineType: Micro-Star International Co., Ltd. MS-7B17
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-21-generic 
root=UUID=a4cb80c1-f367-4150-afd3-31e3ee90bd50 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/25/2019
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.50
dmi.board.asset.tag: Default string
dmi.board.name: MPG Z390 GAMING PRO CARBON (MS-7B17)
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: 1.0
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Micro-Star International Co., Ltd.
dmi.chassis.version: 1.0
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1.50:bd03/25/2019:svnMicro-StarInternationalCo.,Ltd.:pnMS-7B17:pvr1.0:rvnMicro-StarInternationalCo.,Ltd.:rnMPGZ390GAMINGPROCARBON(MS-7B17):rvr1.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr1.0:
dmi.product.family: Default string
dmi.product.name: MS-7B17
dmi.product.sku: Default string
dmi.product.version: 1.0
dmi.sys.vendor: Micro-Star International Co., Ltd.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.100-4
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.2-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.7-2ubuntu2
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 
2:2.99.917+git20190815-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

** Affects: ubuntu
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal ubuntu

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https://bugs.launchpad.net/bugs/1870929

Title:
  Display Scaling causes monitors to sleep

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