Public bug reported:
I have a really annoying bug, I can reproduce often (although it is a
bit random).
I have an Ubuntu 12.04 KVM server , using Centos 6 guests - when I
install the latest kernel for centos 6.3 -2.6.32-279.1.1.el6 - if you
reboot from inside a Centos6 vm it gets stuck in a loop between
seabios/grub - this does't happen 100% of the time - there is a high
chance it will though - usually after 3 reboots it will get stuck in the
loop - it will NEVER reboot without manual intervention (virsh
destroy..)
It seem to fail at the kernel initialise stage - if I use vga=normal I
can see the words 'Probing EEID...' for a sec (then it reboots)
If i use virsh/virt-manager to reboot its fine, only from inside a
centos6 vm (with latest centos kernel) does this occur
As a test I installed centos 6.2 - this was 100% fine *until* I did a
yum update then I got the same issue.
Ubuntu 10.04 KVM host / Centos 6.3 (guest) is fine - so i'm unsure
where the fault is. Likewize a Centos 6.3 kvm host and centos 6.3 guest
is also fine...
I have installed a 2nd Ubuntu 12.04 KVM server and the exact same thing
occurs (i.e 2 different servers = same issue)
How can I troubleshoot this ? I already have already enabled the boot
options 'console=ttyS0' (which I can access vm's using virsh console id)
however this gives no output (as it crashes when initialising the
kernel)
I have also tried installing the latest qemu-kvm (1.1) from source on
the Ubuntu 12.04 kvm server, the same thing occurs .
At present we are replacing Ubuntu as the KVM host (to Centos) whilst
this bug remains.
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: kvm libvirt
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https://bugs.launchpad.net/bugs/1025188
Title:
qemu-kvm : Ubuntu 12.04 (host) / Centos 6.3 (guest) rebooting from
guest gets stuck in a seabios/grub loop - cannot initialise kernel
(10.04 is fine)
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