Kwan Lowe wrote: > On Thu, Mar 7, 2013 at 8:51 PM, Johnny Hughes <johnny at centos.org> wrote: <snip> > As far as logging goes, any idea what sort of failures could cause > such a lockup? I.e., if memory was failing, would the system still be > able to log? As the mouse is frozen and kernel sysrq has no effect, > I'm still leaning towards hardware but literally everything except the > case has been swapped out. (Well.. let me qualify that.. Everything > but the 64GB SSD drive has been swapped but it seemed unlikely that a > drive failure could cause such a lockup. Incorrect assumption?) No ideas... and I've had a number of systems do this, over the last couple years, where someone noted it had stopped responding; I go down, and it doesn't respond *at* *all* when I plug in a monitor & keyboard, and power cycling's the only answer. Thinking about it, I believe it's mostly been on our Penguin servers, and that co. uses Supermicro m/b's, and we've had h/w problems with them, also, and have had several m/b's replaced under warranty. mark