Disable console log window (xconsole)

• In /etc/X11/xenodm/Xsetup_0 (as superuser) comment out the line ${exec_prefix}/bin/xconsole ... via #.

Set background color

• In /etc/X11/xenodm/Xsetup_0 (as superuser) comment out the line ${exec_prefix}/bin/xsetroot -fg via # and replace it with ${exec_prefix}/bin/xsetroot -solid black.