It looks like your tv standard is set wrong. The default standard in your bios is PAL. SCART is more like NTSC from the driver's perspective, so try setting the standard to NTSC.
xrandr --output S-video --set tv_standard NTSC xrandr --output S-video --off xrandr --output S-video --auto
It looks like your tv standard is set wrong. The default standard in your bios is PAL. SCART is more like NTSC from the driver's perspective, so try setting the standard to NTSC.
xrandr --output S-video --set tv_standard NTSC
xrandr --output S-video --off
xrandr --output S-video --auto