Using Core i7 boxes with CentOS 5.7, have experienced lockups on half of a handful of units over a couple months. They are Logic Supply Mini-ITX model KR960 with Core i7-3610QE. A couple weeks ago I enabled self-reboot on kernel panic (echo 10 > /proc/sys/kernel/panic) on all units, and had another unit lock up rather than reboot itself. I'm not sure how to pursue the problem. Doing "yum update kernel*" shows there's a newer kernel, 2.6.18-371.1.2.el5 - I'm using the stock 2.6.18-274.el5 kernel now - where's a change log of the differences so I can see if there are driver or kernel updates that might seem to apply? I don't know if setting up kdump would help since it doesn't even seem to be getting to the point where the kernel is trying to handle a panic. What else might I try?