Mostly for my archive: (might be userfull for others)

Fix a small ‘hick-up’ every 10 seconds for i2c polling of monitor:  (/etc/rc.local)

echo 0 > /sys/module/drm_kms_helper/parameters/poll

Turn off leds: (/etc/rc.local)

echo 0 > /sys/devices/platform/leds-gpio/leds/pandaboard\:\:status1/brightness
echo 0 > /sys/devices/platform/leds-gpio/leds/pandaboard\:\:status2/brightness

Fix screenblanking: (thx to comment in here)

Section "Monitor"
 Identifier "Monitor0"
 Option "DPMS"
EndSection

Section "ServerLayout"
 Identifier "NoBlankScreen"
 Option "BlankTime" "0"
 Option "StandbyTime" "0"
 Option "SuspendTime" "0"
 Option "OffTime" "0"
EndSection

Then

"