According to #294938 this problem is fixed in 2.6.10 kernels. I don't know if it would be possible to identify the fix and backport it to 2.6.8 (I understand this is generally quite hard for ACPI problems).
Cheers, FJP -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]