How do I enable or disable Suspend and Resume?
On some machines, Suspend is enabled by default. But most machines will need to explicitly enable the feature. To see if it is already enabled, look for the "Power" icon in the GNOME panel. Click it and see if Suspend is an option. Or click on the Shutdown menu item to see if there is a Suspend item. If so, then suspend and resume is enabled. Clicking on the Suspend button should allow the machine to suspend.
If these buttons don't exist, and you would like to see if it will work, then the feature will need to be manually enabled. Add the following line to /etc/power.conf:
S3-support enable
Then execute:
/usr/sbin/pmconfig
/usr/sbin/svcadm restart hal
This will save the settings and restart the HAL daemon, making the GNOME tools to use the new settings.
If you don't desire this feature or it was enabled by default and you want to know how to disable it, just add or change the line in /etc/power.conf to read:
S3-support disable
and run the two commands to disable the feature.