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) Create /usr/share/X11/xorg.conf.d/30-monitor.conf and add this Section “Monitor” Identifier “Monitor0″ read more »