Found the following script in the forumes (slightly modified by me).
This gets suspend working on a D820 under gutsy:
#!/bin/sh
# discover video card's ID
ID=`lspci | grep VGA | awk '{ print $1 }' | sed -e '[EMAIL PROTECTED]:@@' -e
's@:@/@'`
# securely create a temporary file
TMP_FILE=`mktemp /var/tmp/video_state.XXXXXX`
trap 'rm -f $TMP_FILE' 0 1 15
# switch to virtual terminal 1 to avoid graphics
# corruption in X
chvt 1
# write all unwritten data (just in case)
sync
# dump current data from the video card to the
# temporary file
cat /proc/bus/pci/$ID > $TMP_FILE
# suspend
echo -n mem > /sys/power/state
# restore video card data from the temporary file
# on resume
cat $TMP_FILE > /proc/bus/pci/$ID
# switch back to virtual terminal 7 (running X)
chvt 9
# remove temporary file
rm -f $TMP_FILE
--
Suspend to ram erratic latest gutsy 09/17/2007
https://bugs.launchpad.net/bugs/140590
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