Ubuntu
kvm package

kvm guests hang after startup

Bug #396219 reported by Kamui
28
This bug affects 3 people
Affects Status Importance Assigned to Milestone
kvm (Ubuntu)
New
Undecided
Unassigned

Bug Description

Binary package hint: kvm

Ubuntu jaunty 9.04 x86
kvm : 1:84+dfsg-0ubuntu12
kernel : 2.6.28-13.45
CPU : Intel E8400 with vmx enabled

Kvm guests (both linux and windows) hang right after grub/init prints "starting up..." (and after the boot menu for windows guests) since the last kernel update : 2.6.28-13.44 -> 2.6.28-13.45.

The problem can be fixed with the following switch in the kvm command line : -cpu qemu64,-nx

I am not sure about what triggered this issue because it happens after a reboot on July 5th and the host was up since July 1st. But the only relevant update i made during this time was the kernel's, so i assumed it was the culprit. I had no issue at all before the reboot.

Here is the IRC log for further details : http://pastebin.com/f5e222c02

Tags: hang kvm nx
Revision history for this message
Andreas Hasenack (ahasenack) wrote :

The workaround worked for me.

Revision history for this message
Chad Waters (chad) wrote :

I'm seeing this same issue in Karmic. The workaround resolved it.

Revision history for this message
William Fernando Merlotto (william-prognus) wrote :

The workaround worked for me to!

I have an Ubuntu jaunty x86
kvm: 84+dfsg-0ubuntu12.3
kernel: 2.6.28-13.45
libvirt-bin: 0.6.4-1ubuntu2~dnjl0~jaunty0

Revision history for this message
Alexander Atanasov (aatanasov) wrote :

If you are using libvirt
create /etc/libvirt/qemu/kvm-32
-------------------snip-----------
#!/bin/bash
exec kvm -cpu qemu32,-nx `echo $*`
---------------end-----------------
use qemu64 for 64bit.

Then modify domains to use the wrapper script
virsh edit <domain>
change emulator in device section to:
<emulator>/etc/libvirt/qemu/kvm-32</emulator>

It may be a good idea to ship with a wrapper and a config file to pass extra options to kvm
from libvirt, since it's not easy to pass them now.

Revision history for this message
jkyamog (jkyamog) wrote :

Work around works for me to. I just recently upgraded from Intrepid to Jaunty. The kvm guests doesn't really hang its very very slow. After the work around both my guest is back running on normal speed.

To post a comment you must log in.
This report contains Public information  
Everyone can see this information.
Subscribing...

Other bug subscribers

Remote bug watches

Bug watches keep track of this bug in other bug trackers.