Bug#837786: mutter: Issues repainting the display on mouse movement

[JWM]

Package: mutter
Version: 3.21.92-1
Severity: grave
Justification: causes non-serious data loss

Dear Maintainer,

After upgrading my system this morning and restarting a new gnome-shell session
(by rebooting), everything being displayed fails to repaint properly.

Everytime I launch an application and try to move the window it leaves traces
(i.e., shadows of its previous positions). The same happens on mouse hover.

Also, the clock (on the top desktop) flickers constantly.  Something similar
happens with the title bar in certain applications (e.g., vivaldi).

Since the only packages upgraded were related to mutter and gnome-shell, I
figure the one to blame is mutter.

I tried upgrading mutter to the version in unstable, but the result is the
same.

There is also no difference by using the classic gnome session or the wayland
session ---although, with wayland, the flickering and repainting is slightly
less frequent.

I tried recording the desktop session (with GNOME's screencast functionality),
but funnily the flickering stops while recording.



-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (500, 'testing'), (200, 'unstable'), (101, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.7.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages mutter depends on:
ii  gsettings-desktop-schemas  3.21.4-2
ii  libc6                      2.23-5
ii  libglib2.0-0               2.49.6-1
ii  libmutter0i                3.21.92-1
ii  libx11-6                   2:1.6.3-1
ii  libxcomposite1             1:0.4.4-1
ii  mutter-common              3.21.92-1
ii  zenity                     3.20.0-1

Versions of packages mutter recommends:
ii  gnome-session [x-session-manager]  3.20.2-1

Versions of packages mutter suggests:
ii  gnome-control-center  1:3.21.90-1
ii  xdg-user-dirs         0.15-2

-- no debconf information