[CentOS-virt] Xen4CentOS installation strangeness

Tue Mar 4 12:50:40 UTC 2014
Peter Peltonen <peter.peltonen at gmail.com>


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


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?

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