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Old 02-10-2011, 06:57 AM   #1
LQ Newbie
Registered: Jan 2011
Location: Suzhou, China
Distribution: Slackware 13.1
Posts: 3

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kvm: vm entry failed with error 0xffffffff

Hi guys, I'm using Slackware 13.1. The kernel version is
I'm trying to use kvm on my machine which has a AMD processor with SVM support.
I create disk image with command "qemu-img create -f qcow2 xp.img
10G". When I run "qemu-system-x86_64 -hda xp.img -cdrom /path/windows.iso -boot d -m 512" command it dosen't work. And prompts below error messages:
No protocol specified
No protocol specified
kvm: vm entry failed with error 0xffffffff
kvm_run returned -22

I have searched this forum, but didn't find any guide. Can any body help? TKS!
Old 02-10-2011, 07:23 AM   #2
Senior Member
Registered: Aug 2004
Location: Pisa, Italy
Distribution: Slackware
Posts: 2,458

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it seems there's a bug with kvm with amd processors on 32bit with kernels <2.6.34

this is the patch to apply

then you have to rebuild the kernel.

or you can switch to slackware64 (there kvm on amd works ok).
Old 02-13-2011, 08:58 PM   #3
LQ Newbie
Registered: Jan 2011
Location: Suzhou, China
Distribution: Slackware 13.1
Posts: 3

Original Poster
Rep: Reputation: 0
Thanks, I have already switched to Slackware64. And it works!



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