Public bug reported:

Adjusting display settings for multiple monitors in gnome-shell in
Ubuntu 17.10/18.04 is really annoying due to its user-unfriendly
operation:

1. When you select a resolution, you have to go and look for the small
close button in the resolution selection window's titlebar and manually
close the resolution selection window. It should close the window
automatically when you select the resolution.

2. When you change the scaling (eg from 200% to 100%), it always resets
the monitor layout to left-right. So if you have already changed it to
above/below and then you change the scaling from 200% to 100% for the
primary monitor, the layout resets to left-right and you have to change
it back again.

3. The default in X11 when it forgets the monitor settings is to set
native resolutions on both monitors. In X11, if the laptop monitor is 4K
and the external monitor say 1920x1080, in X11 it inexplicably sets both
to scale to 200%, so the text etc on the external monitor is gigantic.
(IIRC, it doesn't have this problem in Wayland - it will set the 4K to
200% and the external to 100%.)

4. In case 3, when I change the 4K display to 1920x1020 and then change
the scaling from 200% to 100%, the 'Apply' button disappears so it's
impossible to select the new configuration. (It seems that it considers
these different configurations to be equivalent, perhaps because they
have both been divided by two?)

This is made worse by the fact that normally g-c-c remembers settings
for different monitors (ie resolutions and display layouts for different
monitors), but it completely forgets when either:

a) You switch between Wayland and X11;

b) At apparent random intervals, particularly if you change monitors (eg
from a 1920x1080 one to a 1680x1050 one).

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-control-center 1:3.26.2-0ubuntu5
ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
Uname: Linux 4.15.0-10-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Mar  8 11:05:49 2018
InstallationDate: Installed on 2017-08-16 (203 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
SourcePackage: gnome-control-center
UpgradeStatus: Upgraded to bionic on 2017-11-17 (110 days ago)

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


** Tags: amd64 apport-bug bionic

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https://bugs.launchpad.net/bugs/1754225

Title:
  The display settings in gnome-control-center are annoying to use for
  multiple monitors

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

Bug description:
  Adjusting display settings for multiple monitors in gnome-shell in
  Ubuntu 17.10/18.04 is really annoying due to its user-unfriendly
  operation:

  1. When you select a resolution, you have to go and look for the small
  close button in the resolution selection window's titlebar and
  manually close the resolution selection window. It should close the
  window automatically when you select the resolution.

  2. When you change the scaling (eg from 200% to 100%), it always
  resets the monitor layout to left-right. So if you have already
  changed it to above/below and then you change the scaling from 200% to
  100% for the primary monitor, the layout resets to left-right and you
  have to change it back again.

  3. The default in X11 when it forgets the monitor settings is to set
  native resolutions on both monitors. In X11, if the laptop monitor is
  4K and the external monitor say 1920x1080, in X11 it inexplicably sets
  both to scale to 200%, so the text etc on the external monitor is
  gigantic. (IIRC, it doesn't have this problem in Wayland - it will set
  the 4K to 200% and the external to 100%.)

  4. In case 3, when I change the 4K display to 1920x1020 and then
  change the scaling from 200% to 100%, the 'Apply' button disappears so
  it's impossible to select the new configuration. (It seems that it
  considers these different configurations to be equivalent, perhaps
  because they have both been divided by two?)

  This is made worse by the fact that normally g-c-c remembers settings
  for different monitors (ie resolutions and display layouts for
  different monitors), but it completely forgets when either:

  a) You switch between Wayland and X11;

  b) At apparent random intervals, particularly if you change monitors
  (eg from a 1920x1080 one to a 1680x1050 one).

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: gnome-control-center 1:3.26.2-0ubuntu5
  ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
  Uname: Linux 4.15.0-10-generic x86_64
  ApportVersion: 2.20.8-0ubuntu10
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Mar  8 11:05:49 2018
  InstallationDate: Installed on 2017-08-16 (203 days ago)
  InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
  SourcePackage: gnome-control-center
  UpgradeStatus: Upgraded to bionic on 2017-11-17 (110 days ago)

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