Replacing the shutdown screen
The UL warning image displayed during shutdown can be modified by replacing the file
with an appropriate alternative, in 1200x900 "565" format.
For example, you might wish to try: modified-shutdown.565.
On a linux system, you can convert 1200x900 PNG images to 565-format images as follows:
$ yum -y install netpbm-progs $ pngtopnm myfile.png | ./ppmto565.py -z -o myfile.565
ppmto565.py script found at http://dev.laptop.org/~cscott/ppmto565.py
On core OS versions prior to 8.2, you must omit the -z option. The resulting raw 565-format files seem large, but we use a compressing filesystem on the XO which slims them down nicely.
To disable the shutdown screen entirely (for debugging, for instance), use:
chkconfig ul-warning off
The shutdown screen will still appear on the next shutdown, but will not appear on subsequent shutdowns.
Our UL certification requires us to display this warning; please do not disable the screen in deployed laptops unless for personal use only.