RGBA but A is the first byte? Okay. I hate byte order issues.
Does this change anything?
This experiment2 should also create a .addons/screensaver/fbset.txt, please post it.
If you have a shell, you can try this directly:
Code:
# fbset
# /usr/local/ScreenSaver/pngshow /mnt/onboard/someimage.png
# echo $?
Thanks for testing.