This is how to fix initial black screen on Syberia Steam version running on PlayOnLinux
Syberia player.ini
You need to create a file called player.ini inside the Syberia directory, as follow:
echo "1024 768 16 0 BaseCMO.cmo" > ~/.PlayOnLinux/wineprefix/Steam/drive_c/Program\ Files/Steam/SteamApps/common/Syberia/player.ini
To confirm the contents of the file:
cat ~/.PlayOnLinux/wineprefix/Steam/drive_c/Program\ Files/Steam/SteamApps/common/Syberia/player.ini
1024 768 16 BaseCMO.cmo
After that, just restart Syberia and you should be able to see the initial screen.
PlayOnLinux – How to play windowed:
Configure -> Wine -> Configure wine -> Display -> Emulate a virtual desktop