At: http://www.linux.com/article.pl?sid=06/05/24/1716222
are instructions for implementing suspend mode on a Linux notebook, but the script is for Gentoo and it seems like Centos needs something else. As this puts my system REALLY fast into Suspend, but it never comes back out.
Further the temp file: var/tmp/video_state.XXXXXX is empty, so something is not right.
Now for my system, HP NC4010, cat /sys/power/state results in:
standby mem disk (I think that is the list, definitely 3 items with the 2nd being mem).
I ASSuME that this meets what the instructions tell you need to see if your notebook supports acpi suspend.
But grep ACPI_SLEEP KERNEL_CONFIG does not seem to have a SLEEP line. Well maybe I was not looking in the right place for the kernel_config. I was looking in /usr/src/
But echo -n mem > /sys/power/state really puts my system into a suspend mode fast.
Perhaps part of the problem is with cat /proc/bus/pci/$ID > $TMP_FILE as there are a couple of directories in this directory.
It is rather hard to supply more detailed information, as I have to keep rebooting between XP and Linux until I get Thunderbird migrated...