black screen on Atari 7800

black screen on the Atari 7800. sound exits but nothing appears on the screen

In:
\RECALBOX\share\system\recalbox.conf

Change this line:

global.videomode=CEA 4 HDMI
to
global.videomode=default

it's really a hell this black screen ;-(
i've still work to fix it in all cases.

nadenislamarre is the same problem of the retropie? something with framebuffer, i think they solved with a patch in sdl