Hello, After upgrading to SLES8 SP3 AMD64 I started experiencing random lockups. The whole system freezes with no warning or messages. I also am unable to start up normally, acpi=oldboot doesnt work and the only way to start the system is to disable acpi completely, otherwise it freezes immedaitely with a blank screen when it tries to load the kernel from grub. Dual Opteron 240, DELL PERC 4/SC RAID controller, using driver megaraid2 , 2GB DDR memory, Details of motherboard here: http://www.msicomputer.com/product/detail_spec/product_detail.asp? model=K8T_Master2-FAR All extra settings are disabled in the BIOS. This is important and potenitally major, I'm running on 2.4.19 that I manually installed now but need a solution to this problem.