Bug#856027: mate-desktop: "solid color" for background does not work at all

[Soramichi AKIYAMA]

Package: mate-desktop
Version: 1.16.1-1
Severity: normal

Dear Maintainers,

I found that changing the background color to a "solid color" does not work at all in my environment.
It actually looked working at first, but after I did "Pick a Color" several times it stopped working and it does not recover even after I reboot the machine.
The background becomes just black, or sometimes a random color no matter which color I choose.
The "Horizontal gradient" and "Vertical gradient" options looks working.

I'm using Ge Force GT 710 and NVIDIA driver 375.20, in case this information helps.
The version of X is 1.19.1 (the default of stretch).
> X.Org X Server 1.19.1
> Release Date: 2017-01-11
> X Protocol Version 11, Revision 0

-- System Information:
Debian Release: 9.0
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.9.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages mate-desktop depends on:
ii  hicolor-icon-theme        0.15-1
ii  libatk1.0-0               2.22.0-1
ii  libc6                     2.24-9
ii  libcairo-gobject2         1.14.8-1
ii  libcairo2                 1.14.8-1
ii  libgdk-pixbuf2.0-0        2.36.4-1
ii  libglib2.0-0              2.50.2-2
ii  libgtk-3-0                3.22.7-2
ii  libmate-desktop-2-17      1.16.1-1
ii  libpango-1.0-0            1.40.3-3
ii  libpangocairo-1.0-0       1.40.3-3
ii  libstartup-notification0  0.12-4
ii  libxrandr2                2:1.5.1-1
ii  mate-desktop-common       1.16.1-1
ii  python                    2.7.13-2
ii  python-requests           2.12.4-1

Versions of packages mate-desktop recommends:
ii  mate-user-guide  1.16.0-1

mate-desktop suggests no packages.

-- no debconf information