Public bug reported:

When the nvidia driver is installed, the screen turns off when trying to
set some fractional scaling values like 150%. And it stays off even
after rebooting and logging in again.

And from ssh I can see there's no current mode set anymore (just like in
bug 1869750):

$ xrandr
Screen 0: minimum 8 x 8, current 960 x 600, maximum 16384 x 16384
DVI-I-0 disconnected (normal left inverted right x axis y axis)
DVI-I-1 disconnected (normal left inverted right x axis y axis)
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 connected primary (normal left inverted right x axis y axis)
   1920x1200     59.95 +  59.88

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: mutter 3.36.1-3ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-24.28-generic 5.4.30
Uname: Linux 5.4.0-24-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
Date: Fri Apr 17 15:51:15 2020
InstallationDate: Installed on 2020-02-03 (73 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200124)
SourcePackage: mutter
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: gnome-control-center (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: gnome-shell (Ubuntu)
     Importance: Undecided
         Status: New

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


** Tags: amd64 apport-bug black-screen champagne focal nvidia xrandr-scaling

** Tags added: black-screen

** Also affects: gnome-shell (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: gnome-control-center (Ubuntu)
   Importance: Undecided
       Status: New

** Summary changed:

- [nvidia] Screen turns off when trying to switch to fractional scaling values
+ [nvidia] Screen turns off when trying to set fractional scaling values

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https://bugs.launchpad.net/bugs/1873403

Title:
  [nvidia] Screen turns off when trying to set some fractional scaling
  values

Status in gnome-control-center package in Ubuntu:
  New
Status in gnome-shell package in Ubuntu:
  New
Status in mutter package in Ubuntu:
  New

Bug description:
  When the nvidia driver is installed, the screen turns off when trying
  to set some fractional scaling values like 150%. And it stays off even
  after rebooting and logging in again.

  And from ssh I can see there's no current mode set anymore (just like
  in bug 1869750):

  $ xrandr
  Screen 0: minimum 8 x 8, current 960 x 600, maximum 16384 x 16384
  DVI-I-0 disconnected (normal left inverted right x axis y axis)
  DVI-I-1 disconnected (normal left inverted right x axis y axis)
  DP-0 disconnected (normal left inverted right x axis y axis)
  DP-1 connected primary (normal left inverted right x axis y axis)
     1920x1200     59.95 +  59.88

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: mutter 3.36.1-3ubuntu2
  ProcVersionSignature: Ubuntu 5.4.0-24.28-generic 5.4.30
  Uname: Linux 5.4.0-24-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Fri Apr 17 15:51:15 2020
  InstallationDate: Installed on 2020-02-03 (73 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200124)
  SourcePackage: mutter
  UpgradeStatus: No upgrade log present (probably fresh install)

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