Public bug reported:

On all my machines with a single monitor this bug is absent, i.e. it is
specific to a dual monitor configuration only.

One of my desktops is connected to a Dell 24" (1200x1920 i.e. portrait
mode, useful for editing source code) via VGA and AOC 28" (1920x1080)
via DVI (btw, I noticed that xrandr says it is connected via HDMI ---
this desktop doesn't even have an HDMI port, only DVI and VGA!). The
Dell monitor is quite old, but of extremely high quality, which is why I
still keep it. Now, being so old, in the last couple of months it has
developed the following symptom: it would boot into 1024x768 (or
768x1024 to be pedantically exact) resolution and as soon as I login to
unity session I would execute a script "fix-resolution.sh" which
contains the following three commands:

xrandr --newmode "1920x1200_60.00" 193.16 1920 2048 2256 2592 1200 1201 1204 
1242 -HSync +Vsync
xrandr --addmode VGA-1 "1920x1200_60.00"
xrandr --output VGA-1 --mode "1920x1200_60.00"

This would fix the resolution and I would continue working normally.
However, even though I previously set the Theme (both GTK Theme and
Window decoration theme in unity-tweak-tool) to "Radiance", the top
panel becomes dark, i.e. as in Ambience. But the window decorations are
light, i.e. as they should be in the "Radiance" theme.

Why did I mention the resolution switch issue above? Because I noticed,
that when the computer boots with the Dell monitor in the correct
resolution (by luck, i.e. maybe EDID info from the monitor gets through
to the OS side?) then the top panel is correct, i.e. light as in
Radiance.

The Ubuntu version is 16.04.3:

$ lsb_release -rd
Description:    Ubuntu 16.04.3 LTS
Release:        16.04
$ unity --version
unity 7.4.0
$ uname -a
Linux brave 4.10.0-40-generic #44~16.04.1-Ubuntu SMP Thu Nov 9 15:37:44 UTC 
2017 x86_64 x86_64 x86_64 GNU/Linux

Any ideas on how to fix the GTK Theme to Radiance? I tried setting it
via System Settings/Appearance and via unity-tweak-tool and even via
gnome-tweak-tool. None of the methods is sufficient to force the theme
to remain set to Radiance.

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

** Package changed: gnome-terminal (Ubuntu) => unity (Ubuntu)

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https://bugs.launchpad.net/bugs/1736723

Title:
  GTK Theme is reset to Ambience on almost every reboot

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