On 3/4/2014 8:45 PM, Pasi Kärkkäinen wrote: > On Tue, Mar 04, 2014 at 02:50:40PM +0200, Peter Peltonen wrote: >> Hi, >> I have a server with Supermicro X7DVL-3 (P9) motherboard, 16G ECC RAM and >> LSI SAS 1068e RAID controller. I installed CentOS 6.5 64bit on the machine >> without any problems, but after following the Xen setup steps at >> http://wiki.centos.org/HowTos/Xen/Xen4QuickStart >> which installed me the kernel 3.10.32-11.el6.centos.alt.x86_64, I >> encountered a problem: After "Starting certmonger [OK]" the screen went >> black and the system became unresponsive: keyboard was not working >> (NumLock did not respond) and SSH was not responding either. After first >> lockup I increased dom0 max mem to 2G, but rebooting after that produced >> the same result. The strange thing is, that after a third reboot >> everything worked ok: screen went black for a moment after "Staring >> certmonger [OK]" but after that the graphical login screen appeared and I >> could use the system normally. The fourth reboot went ok as well. >> Any ideas what could cause this kind of behaviour? >> > No idea really.. but what you should do is to enable/configure a serial console, > probably by using the IPMI SOL, so you can capture and log all the Xen and dom0 kernel > boot messages.. > > So we can hopefully *see* what the issue is, and not have to guess :) > > -- Pasi > >> Regards, >> Peter >> Also, are you sure your hardware is stable? It sounds a lot like a hardware issue... Try to run memtest for a while. Z.