KVM version 84 Host OS: Centos version: 2.6.18-92.el5 Guest OS: Windows Server 2008 Web Processor: Intel Xeon L5420 Quad-Core

I have installed kvm version 84 from .rpm's on lfarkas.org. Without the --no-acpi option, Windows 2008 boots fine. With the --no-acpi option, the VM displays the following:

Windows Boot Manager Windows failed to start... Status 0xc0000225 Info: Windows failed to load because the firmware (BIOS) is not ACPI compatible

I heard that for best performance, the -no-acpi option is recommended. Maybe that's only an issue with other versions of Windows/KVM. Can anyone confirm?

Assuming -no-acpi is worth persuing, is there a solution? Is it a known issue? I couldn't find many references on the web. I downloaded & compiled the latest kernel version 2.6.28.7 from kernel.org and I think the -no-acpi option worked but I've wiped the machine now so can't confirm. Do I need to install a kernel patch and if so which one?

This is the kvm command-line...

/usr/bin/qemu-kvm -no-acpi -k en-gb -m 1024 -monitor stdio -usb -usbdevice tablet -net nic,macaddr=52:54:00:12:34:58 -net tap,script=/etc/incharge/qemu-ifup -vnc :1 -hda /media/vm01/vm01-hda.raw -hdb /media/archive/vm01-hdb.raw

...although any variant with -no-acpi fails, including the installing from the .iso...

/usr/bin/qemu-kvm -no-acpi -m 1024 -vnc :1 -cdrom "/media/archive/win2008web-trial.iso" -boot d /media/vm01/vm01-hda.raw

For anyone else wanting to know how to install KVM version 84, this worked for me: yum remove kvm yum install zlib-devel alsa-lib-devel SDL-devel gnutls-devel dev86 texi2html glibc-devel.i386 rpm -i -v http://www.lfarkas.org/linux/packages/centos/5/x86_64/etherboot-roms-kvm-5.4... rpm -i -v http://www.lfarkas.org/linux/packages/centos/5/x86_64/kmod-kvm-84-1.x86_64.r... rpm -i -v http://www.lfarkas.org/linux/packages/centos/5/x86_64/kvm-84-1.x86_64.rpm reboot

Before I post this solution under my original forum post... http://www.centos.org/modules/newbb/viewtopic.php?topic_id=19034&forum=3... ...is this the recommended method for running KVM 72+?

According to this... http://www.linux-kvm.org/page/Guest_Support_Status ...KVM version 72 is required for Windows Server 2008. CentOS ships with KVM 36 and the testing repositories have version 66 - and that's only provided as source: http://dev.centos.org/centos/5/testing/SRPMS/. Maybe the KVM HowTo could be updated for anyone with the misfortune to require Windows Server 2008: http://wiki.centos.org/HowTos/KVM

Thanks, Julez