Kernel on host is 6.0.15-1. Problem as in subject line.
When I try to start the VM, I get:
Failed to load the NVRAM store from the file (VERR_VFS_UNSUPPORTED_FORMAT).
Can't attach Nvram Storage driver (VERR_VFS_UNSUPPORTED_FORMAT).
|Result Code:|NS_ERROR_FAILURE (0X80004005)|
| --- | --- |
I noticed that my extensions were 7.0.2 but my virtualbox is 7.0.4. I updated, hoping that this would make the issue go away, but it didn’t.
you misunderstood me, I already updated my virtualbox extensions, but the problem persists.
someone else experienced the same error recently but did not disclose the solution:
Someone else reported this issue on the virtualbox forum
and found that changing the name of the VM made the error go away. I tried this, but the error persists.
I don’t know if virtualbox uses semantic versioning - if they do - the major release number usually signals breaking changes - no backwards compatibility.
If I recall - the efi image which has changed from v6 to v7.
The change has to do with the requirements of win11 - tpm and secureboot.
Without any way of testing - as there may be implications involvning your activation key - you could try the following
- Open the folder with your current win11 vm.
- Assuming your current vm’s name is win11
- Create a backup copy of the win11.nvram file
cp win11.nvram win11.nvram.bak
- Create a new win11 named win11vbox7
- don’t install or boot it - the only interesting about the vm is the .nvram file.
- Open the folder with the new vm
- Copy the new nvram file to your existing vm
- Replace your current win11.nvram with the newname.nvram file e.g.
cp win11vbox7.nvram ../win11/win11.nvram
- Start your old vm
If it works - then
The win11 guest started booting again after this.
(It froze during the boot process though; but another site that talked about win11 guests no longer booting about the 6->7 VB upgrade recommended turning off 3d acceleration, and that worked for me too. )
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