CentOS virt - Mar 2014 - Xen4CentOS installation strangeness

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?

Regards,
Peter
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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
>    [1]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
>