[Bug 1021271] Re: KVM "enabling virtualization on CPU0 failed"

[Hong Yuan]

Thanks for the help but alas it does not work this time either.

I have installed and tried both linux-generic-lts-quantal and linux-
generic-lts-raring:

$ sudo wajig install linux-generic-lts-*

Result with quantal:

hong at vhost01:~$ uname -a
Linux vhost01 3.5.0-42-generic #65~precise1-Ubuntu SMP Wed Oct 2 20:57:18 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
hong at vhost01:~$ sudo kvm
failed to initialize KVM: Device or resource busy
Back to tcg accelerator.
Could not initialize SDL(No available video device) - exiting
hong at vhost01:~$ dmesg | grep kvm | tail
[   14.381796] kvm: enabling virtualization on CPU2 failed
[   14.381805] kvm: enabling virtualization on CPU0 failed
[   14.438460] kvm: enabling virtualization on CPU0 failed
[   14.438462] kvm: enabling virtualization on CPU1 failed
[   14.438466] kvm: enabling virtualization on CPU2 failed
[   14.438474] kvm: enabling virtualization on CPU3 failed
[   33.561382] kvm: enabling virtualization on CPU0 failed
[   33.561385] kvm: enabling virtualization on CPU1 failed
[   33.561387] kvm: enabling virtualization on CPU3 failed
[   33.561396] kvm: enabling virtualization on CPU2 failed

Then I boot into each one. Result with raring:

hong at vhost01:~$ uname -a
Linux vhost01 3.8.0-32-generic #47~precise1-Ubuntu SMP Wed Oct 2 16:19:35 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
hong at vhost01:~$ sudo kvm
failed to initialize KVM: Device or resource busy
Back to tcg accelerator.
Could not initialize SDL(No available video device) - exiting
hong at vhost01:~$ dmesg | grep kvm | tail 
[   14.255276] kvm: enabling virtualization on CPU2 failed
[   14.255284] kvm: enabling virtualization on CPU0 failed
[   64.876582] kvm: enabling virtualization on CPU0 failed
[   64.876584] kvm: enabling virtualization on CPU3 failed
[   64.876587] kvm: enabling virtualization on CPU2 failed
[   64.876595] kvm: enabling virtualization on CPU1 failed
[  290.615655] kvm: enabling virtualization on CPU0 failed
[  290.615660] kvm: enabling virtualization on CPU1 failed
[  290.615666] kvm: enabling virtualization on CPU3 failed
[  290.615685] kvm: enabling virtualization on CPU2 failed

While with precies the error is only seen with CPU0, with the new
kernels it is repeated on all CPU's.

With further Googling I stumled upon a post:

https://bbs.archlinux.org/viewtopic.php?id=148163

which suggests a BIOS upgrade might work. But since kvm worked perfectly
under 10.04LTS, it should be software related and a BIOS upgrade would
be a last resort as a workaround rather than a solution.

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https://bugs.launchpad.net/bugs/1021271

Title:
  KVM "enabling virtualization on CPU0 failed"

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