Good Afternoon,
I experienced the same problem with an extremely sluggish state on my IBM Thinkcentre M50 8187-F8G. After trying to disable ACPI_SLEEP with no success I found out the following:
http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=TCTR-ERRN91
After flashing my BIOS those sleep state problems disappeared.
regards,
Clemens
