Installing and Configuring Ubuntu on a Laptop
Subject:   Suspend to RAM
Date:   2005-11-22 06:13:05
From:   asgeirn
On my Thinkpad T42 with ATI hardware, I had to add acpi_sleep=s3_bios to fix the blank screen upon ACPI resume.

I got the tip from ThinkWiki, a place with useful information also for non-Thinkpad owners with the same hardware bits as Lenovo use.