disable fb0

orm/omapdss/overlay0s/devices/platform/omapdss/overlay1# ovl0=/sys/devices/platf
orm/omapdss/overlay1s/devices/platform/omapdss/overlay1# ovl1=/sys/devices/platf
orm/omapdss/overlay2s/devices/platform/omapdss/overlay1# ovl2=/sys/devices/platf
orm/omapdss/manager0s/devices/platform/omapdss/overlay1# mgr0=/sys/devices/platf
orm/omapdss/manager1s/devices/platform/omapdss/overlay1# mgr1=/sys/devices/platf
rm/omapdss/display1ys/devices/platform/omapdss/overlay1# lcd=/sys/devices/platfo
rm/omapdss/display0ys/devices/platform/omapdss/overlay1# dvi=/sys/devices/platfo
m/omapdss/display2sys/devices/platform/omapdss/overlay1# tv=/sys/devices/platfor
/fb0@beagleboard:/sys/devices/platform/omapdss/overlay1# fb0=/sys/class/graphics
/fb1@beagleboard:/sys/devices/platform/omapdss/overlay1# fb1=/sys/class/graphics
/fb2@beagleboard:/sys/devices/platform/omapdss/overlay1# fb2=/sys/class/graphics
root@beagleboard:/sys/devices/platform/omapdss/overlay1#
root@beagleboard:/sys/devices/platform/omapdss/overlay1# cd $fb0
root@beagleboard:/sys/class/graphics/fb0# cat overlays
0
root@beagleboard:/sys/class/graphics/fb0# cd $fb1
root@beagleboard:/sys/class/graphics/fb1# cat overlays
1
root@beagleboard:/sys/class/graphics/fb1# cd $ovl0
root@beagleboard:/sys/devices/platform/omapdss/overlay0# cat enabled
1
root@beagleboard:/sys/devices/platform/omapdss/overlay0# cd $ovl1
root@beagleboard:/sys/devices/platform/omapdss/overlay1# cat enabled
1
root@beagleboard:/sys/devices/platform/omapdss/overlay1# cd $fb0
root@beagleboard:/sys/class/graphics/fb0# echo "" > overlays
root@beagleboard:/sys/class/graphics/fb0# echo 1 > blank
-sh: echo: write error: Invalid argument
-> nothing happens here, as the fb0 isn't connected to the overlay
root@beagleboard:/sys/class/graphics/fb0# echo 0 > blank
-sh: echo: write error: Invalid argument
root@beagleboard:/sys/class/graphics/fb0# echo "0" > overlays
root@beagleboard:/sys/class/graphics/fb0# cd $ovl0
root@beagleboard:/sys/devices/platform/omapdss/overlay0# echo 0 > enabled
root@beagleboard:/sys/devices/platform/omapdss/overlay0# cd $fb0
root@beagleboard:/sys/class/graphics/fb0# echo 1 > blank
-> lcd disables (although ovl1 and fb1 are still enabled...)
root@beagleboard:/sys/class/graphics/fb0# echo 0 > blank
-> lcd enables
root@beagleboard:/sys/class/graphics/fb0# cd $ovl0
root@beagleboard:/sys/devices/platform/omapdss/overlay0# echo 1 > enabled
root@beagleboard:/sys/devices/platform/omapdss/overlay0# cd $ovl1
root@beagleboard:/sys/devices/platform/omapdss/overlay1# echo 0 > enabled
-> content of fb0 is shown (expected, as fb1 was on top of fb0)
root@beagleboard:/sys/devices/platform/omapdss/overlay1#