Public bug reported:

Two issues with GNOME Display Settings since upgrading to Ubuntu 24.04
beta

1 - I am unable to select Fractional Scaling and set it to 150%.

The Fractional Scaling checkbox appears to do nothing - 1) selecting it
does not enable the Apply button 2) does not update the list of
supported scaling factors to include fractional values.

2 - There is a ghost display

I have one display plugged into a NVDIA 4080, using proprietary driver.
There is a ghost "Unknown Display" in Display Settings at resolution
1024x768.

Expectations:

1 - I should be able to enable Fractional Scaling and set it to 150%

2 - There should be no ghost "Unknown Display"

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: xorg 1:7.7+23ubuntu2
ProcVersionSignature: Ubuntu 6.8.0-22.22-generic 6.8.1
Uname: Linux 6.8.0-22-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.capabilities.gpu0: Error: path was not a regular file.
.proc.driver.nvidia.capabilities.mig: Error: path was not a regular file.
.proc.driver.nvidia.gpus.0000.01.00.0: Error: path was not a regular file.
.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  535.171.04  Tue Mar 19 
20:30:00 UTC 2024
 GCC version:  gcc version 13.2.0 (Ubuntu 13.2.0-23ubuntu3)
ApportVersion: 2.28.0-0ubuntu1
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 14 19:14:31 2024
DistUpgraded: 2024-04-14 17:14:28,561 DEBUG migrateToDeb822Sources()
DistroCodename: noble
DistroVariant: ubuntu
DkmsStatus:
 nvidia/535.171.04, 6.5.0-27-generic, x86_64: installed
 nvidia/535.171.04, 6.8.0-22-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
 Subsystem: Micro-Star International Co., Ltd. [MSI] AlderLake-S GT1 [1462:7d25]
 NVIDIA Corporation AD103 [GeForce RTX 4080] [10de:2704] (rev a1) (prog-if 00 
[VGA controller])
   Subsystem: Micro-Star International Co., Ltd. [MSI] AD103 [GeForce RTX 4080] 
[1462:5111]
InstallationDate: Installed on 2022-04-30 (715 days ago)
InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
MachineType: Micro-Star International Co., Ltd. MS-7D25
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: root=UUID=43e064ac-5857-4c85-b15d-1dd96cdad27b ro quiet 
splash vt.handoff=7 initrd=boot\initrd.img-6.8.0-22-generic
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to noble on 2024-04-15 (0 days ago)
dmi.bios.date: 11/13/2023
dmi.bios.release: 5.27
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: A.F0
dmi.board.asset.tag: Default string
dmi.board.name: PRO Z690-A WIFI (MS-7D25)
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: 2.0
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Micro-Star International Co., Ltd.
dmi.chassis.version: 2.0
dmi.modalias: 
dmi:bvnAmericanMegatrendsInternational,LLC.:bvrA.F0:bd11/13/2023:br5.27:svnMicro-StarInternationalCo.,Ltd.:pnMS-7D25:pvr2.0:rvnMicro-StarInternationalCo.,Ltd.:rnPROZ690-AWIFI(MS-7D25):rvr2.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr2.0:skuDefaultstring:
dmi.product.family: Default string
dmi.product.name: MS-7D25
dmi.product.sku: Default string
dmi.product.version: 2.0
dmi.sys.vendor: Micro-Star International Co., Ltd.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.120-2build1
version.libgl1-mesa-dri: libgl1-mesa-dri 24.0.3-1ubuntu4
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 2:21.1.11-2ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:22.0.0-1build1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20210115-1build1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2build1

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


** Tags: amd64 apport-bug noble resolution ubuntu

** Attachment added: "Screenshot from 2024-04-14 19-18-51.png"
   
https://bugs.launchpad.net/bugs/2061344/+attachment/5765520/+files/Screenshot%20from%202024-04-14%2019-18-51.png

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https://bugs.launchpad.net/bugs/2061344

Title:
  Issues with GNOME Display Settings in Ubuntu 24.04 beta

Status in xorg package in Ubuntu:
  New

Bug description:
  Two issues with GNOME Display Settings since upgrading to Ubuntu 24.04
  beta

  1 - I am unable to select Fractional Scaling and set it to 150%.

  The Fractional Scaling checkbox appears to do nothing - 1) selecting
  it does not enable the Apply button 2) does not update the list of
  supported scaling factors to include fractional values.

  2 - There is a ghost display

  I have one display plugged into a NVDIA 4080, using proprietary
  driver. There is a ghost "Unknown Display" in Display Settings at
  resolution 1024x768.

  Expectations:

  1 - I should be able to enable Fractional Scaling and set it to 150%

  2 - There should be no ghost "Unknown Display"

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: xorg 1:7.7+23ubuntu2
  ProcVersionSignature: Ubuntu 6.8.0-22.22-generic 6.8.1
  Uname: Linux 6.8.0-22-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  .proc.driver.nvidia.capabilities.gpu0: Error: path was not a regular file.
  .proc.driver.nvidia.capabilities.mig: Error: path was not a regular file.
  .proc.driver.nvidia.gpus.0000.01.00.0: Error: path was not a regular file.
  .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  535.171.04  Tue Mar 19 
20:30:00 UTC 2024
   GCC version:  gcc version 13.2.0 (Ubuntu 13.2.0-23ubuntu3)
  ApportVersion: 2.28.0-0ubuntu1
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CasperMD5CheckResult: pass
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Apr 14 19:14:31 2024
  DistUpgraded: 2024-04-14 17:14:28,561 DEBUG migrateToDeb822Sources()
  DistroCodename: noble
  DistroVariant: ubuntu
  DkmsStatus:
   nvidia/535.171.04, 6.5.0-27-generic, x86_64: installed
   nvidia/535.171.04, 6.8.0-22-generic, x86_64: installed
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Subsystem: Micro-Star International Co., Ltd. [MSI] AlderLake-S GT1 
[1462:7d25]
   NVIDIA Corporation AD103 [GeForce RTX 4080] [10de:2704] (rev a1) (prog-if 00 
[VGA controller])
     Subsystem: Micro-Star International Co., Ltd. [MSI] AD103 [GeForce RTX 
4080] [1462:5111]
  InstallationDate: Installed on 2022-04-30 (715 days ago)
  InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 
(20220419)
  MachineType: Micro-Star International Co., Ltd. MS-7D25
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  ProcKernelCmdLine: root=UUID=43e064ac-5857-4c85-b15d-1dd96cdad27b ro quiet 
splash vt.handoff=7 initrd=boot\initrd.img-6.8.0-22-generic
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: Upgraded to noble on 2024-04-15 (0 days ago)
  dmi.bios.date: 11/13/2023
  dmi.bios.release: 5.27
  dmi.bios.vendor: American Megatrends International, LLC.
  dmi.bios.version: A.F0
  dmi.board.asset.tag: Default string
  dmi.board.name: PRO Z690-A WIFI (MS-7D25)
  dmi.board.vendor: Micro-Star International Co., Ltd.
  dmi.board.version: 2.0
  dmi.chassis.asset.tag: Default string
  dmi.chassis.type: 3
  dmi.chassis.vendor: Micro-Star International Co., Ltd.
  dmi.chassis.version: 2.0
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInternational,LLC.:bvrA.F0:bd11/13/2023:br5.27:svnMicro-StarInternationalCo.,Ltd.:pnMS-7D25:pvr2.0:rvnMicro-StarInternationalCo.,Ltd.:rnPROZ690-AWIFI(MS-7D25):rvr2.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr2.0:skuDefaultstring:
  dmi.product.family: Default string
  dmi.product.name: MS-7D25
  dmi.product.sku: Default string
  dmi.product.version: 2.0
  dmi.sys.vendor: Micro-Star International Co., Ltd.
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.120-2build1
  version.libgl1-mesa-dri: libgl1-mesa-dri 24.0.3-1ubuntu4
  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 2:21.1.11-2ubuntu1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:22.0.0-1build1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20210115-1build1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.17-2build1

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