I had this working when I got my Thinkpad X30 a couple of years ago, then I botched the installation and for the longest time I haven’t had proper suspend/resume. A couple of questions to the thinkpad linux mailing list sorted me out. I’ve put the solution here just in case my installation gets fcked up again.
I’ve put this “acpi_sleep=s3_bios,s3_mode” on the kernel line in my /boot/grub/menu.lst, installed the uswsusp package.
Then I can use s2ram or s2disk. To get ubuntu to do the right thing from GUI put this /usr/lib/hal/scripts/linux/hal-system-power-suspend-linux
!/bin/sh
/sbin/s2ram
And this in /usr/lib/hal/scripts/linux/hal-system-power-hibernate-linux
!/bin/sh
/sbin/s2disk
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