Bug#944352: scummvm: screen gets black and/or flickering in full screen mode using X11 sessions

[Thorsten Ehlers]

Package: scummvm
Version: 2.1.0+dfsg1-1
Severity: important

Dear Maintainer,

   * What led up to the situation?

        Starting a Gnome / X11 session and choose option "Full Screen" in
scummvm.
        scummvm is shortly visible but renders both mouse pointers the red one
of scummvm and the X11 one.
        If we move the mouse the screen renders black and stays black.

        If we try the same in a Virtualbox environment the screen flickers
badly in full screen mode.


   * What exactly did you do (or not do) that was effective (or
     ineffective)?

        Start Gnome in Wayland session

   * What was the outcome of this action?

        In a Gnome / Wayland session scummvm works fine in full screen mode.

   * What outcome did you expect instead?

        I expect scummvm to work in both X11 and Wayland sessions as it used to
be before

greetings



-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.3.0-1-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages scummvm depends on:
ii  liba52-0.7.4     0.7.4-20
ii  libasound2       1.1.9-1
ii  libc6            2.29-3
ii  libfaad2         2.9.1-1
ii  libflac8         1.3.3-1
ii  libfluidsynth1   1.1.11-4
ii  libfreetype6     2.10.1-2
ii  libgcc1          1:9.2.1-17
ii  libjpeg62-turbo  1:1.5.2-2+b1
ii  libmad0          0.15.1b-10
ii  libmpeg2-4       0.5.1-8+b1
ii  libogg0          1.3.2-1+b1
ii  libpng16-16      1.6.37-1
ii  libsdl2-2.0-0    2.0.10+dfsg1-1
ii  libsndio7.0      1.5.0-3
ii  libstdc++6       9.2.1-17
ii  libtheora0       1.1.1+dfsg.1-15
ii  libvorbis0a      1.3.6-2
ii  libvorbisfile3   1.3.6-2
ii  scummvm-data     2.1.0+dfsg1-1
ii  zlib1g           1:1.2.11.dfsg-1+b1

scummvm recommends no packages.

Versions of packages scummvm suggests:
ii  beneath-a-steel-sky         0.0372-7
pn  drascula                    <none>
pn  flight-of-the-amazon-queen  <none>
pn  fluidsynth | timidity       <none>
pn  lure-of-the-temptress       <none>

-- no debconf information