I'm having similar problem with AMD 64 Athlon and Radeon 9250. in Ubuntu 6.06 i386.
Initially after S3 restore the computer would freeze screen would show different color patterns. After playing with acpi-support the computer now reboots on S3 resume. I was trying to execute vbestate save as described in one of the previous messages but getting the following error: Get video state buffer size failed Allocated buffer at 0x11010 (base is 0x0) ES: 0x1101 EBX: 0x0000 Save video state failed -- saving/restoring vbestate on suspend/resume results in black screen https://launchpad.net/bugs/11919 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs