KVM/QEMU - can't restart an existing machine after update

[Reid]

I’m trying to restart a Win11 machine built using KVM/QEMU a few years ago, but I’m getting this error msg: "Unable to find any master var store for loader: /usr/share/edk2-ovmf/x64/OVMF_CODE.secboot.4m.fd.?

Actually, at first I was getting the error referenced by taogi in this forum post:

Missing file OVMF_CODE.secboot.fd after Update

Hi, I am running a windows 11 virtual machine with GPU passthrough for almost two years now. The machine was configured with Virtual Machine Manager. It worked like a charm so far. Unfortunatelly, after the last Update to version “ManjaroLinux 24.2.0 Yonada”, Virtual Machine Manager complains about a missing file named “/usr/share/edk2-ovmf/x64/OVMF_CODE.secboot.fd” which is indeed missing. The missing file ist referenced in the configuration like this: <os> <type arch="x86_64" machine…

So I followed the guidance shown in that thread. But now I’m getting error about “unable to fine master var store” shown above.
Have you heard of this?
Your thoughts welcome.
thx

[freggel.doe]

Check nvram settings in your vm’s xml file:

$ sudo grep nvram -R /etc/libvirt/qemu
/etc/libvirt/qemu/arch.xml:    <nvram template='/usr/share/edk2/x64/OVMF_VARS.4m.fd'>/var/lib/libvirt/qemu/nvram/arch.fd</nvram>

In my arch vm example here there is a template given as /usr/share/edk2/x64/OVMF_VARS.4m.fd and the actual file for the vm vars as /var/lib/libvirt/qemu/nvram/arch.fd.
Are both files (for your vm!) existing on your machine?

[Reid]

Hi freggel.doe -
Thx for the reply.
I executed the grep command and got this response:

/etc/libvirt/qemu/win10b.xml:    <nvram format='raw'>/var/lib/libvirt/qemu/nvram/win10b_VARS.4m.fd</nvram>

To me, that’s just one file.

[Reid]

This is the contents of /usr/share/edk2/x64

rsv2@reid-galagopro:~$ ls -l /usr/share/edk2/x64
total 15856
-rw-r--r-- 1 root root 4194304 Nov 28 06:05 MICROVM.4m.fd
-rw-r--r-- 1 root root 4194304 Nov 28 06:05 OVMF.4m.fd
-rw-r--r-- 1 root root 3653632 Nov 28 06:05 OVMF_CODE.4m.fd
-rw-r--r-- 1 root root 3653632 Nov 28 06:05 OVMF_CODE.secboot.4m.fd
-rw-r--r-- 1 root root  540672 Nov 28 06:05 OVMF_VARS.4m.fd
rsv2@reid-galagopro:~$ 
rsv2@reid-galagopro:~$ 

[freggel.doe]

@Reid

/var/lib/libvirt/qemu/nvram/win10b_VARS.4m.fd

I assume this file exists?
Does the vm start if you move it out of the way?

[Reid]

Hey freggel.doe
many thanks for that. There was an incorrectly named file, which I corrected, and it boots now.
So I can understand the purpose of those files, do you happen know where I can find the documentation that explains those files?

[freggel.doe]

@Reid

So I can understand the purpose of those files, do you happen know where I can find the documentation that explains those files?

I don’t have a documentation link at hand but AFAIK those files are needed to save some uefi settings for the vm, the boot entries for example.

[Reid]

OK, got it.
And thx again