Ubuntu24.04 VMs no longer booting after Upgrade to Parallels Desktop 27 Pro

A

AndreasK27

Member
After Upgrading to Parallels Desktop 27 (Pro Editon) on my 48GB M4 Pro MacBook Pro with MacOS 26.6.2, my Ubuntu 24.04 VMs no longer start and hang after displaying:
EFI stub: Booting Linux Kernel...
EFI stub: EFI_RNG_PROTOCOL unavailable
EFI stub: Loaded initrd from LINUX_EFI_INITRD_MEDIA_GUID device path
EFI stub: Generating empty DTB
EFI stub: Exiting boot services ...

Also after Upgrading, Parallels did not display the Control-Center. I had to start the VMs by double-click on the .pvm files in the Parallels folder.

Starting Windows 11 VMs worked fine, Ubuntu 24.04 VMs do seem to have an UEFI-configuration boot Issue.
 
AndreasK27 said:
After Upgrading to Parallels Desktop 27 (Pro Editon) on my 48GB M4 Pro MacBook Pro with MacOS 26.6.2, my Ubuntu 24.04 VMs no longer start and hang after displaying:
EFI stub: Booting Linux Kernel...
EFI stub: EFI_RNG_PROTOCOL unavailable
EFI stub: Loaded initrd from LINUX_EFI_INITRD_MEDIA_GUID device path
EFI stub: Generating empty DTB
EFI stub: Exiting boot services ...

Also after Upgrading, Parallels did not display the Control-Center. I had to start the VMs by double-click on the .pvm files in the Parallels folder.

Starting Windows 11 VMs worked fine, Ubuntu 24.04 VMs do seem to have an UEFI-configuration boot Issue.
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Hello,
Thank you for your post.
We have created a ticket for you, and we will be following up accordingly. Please check your email.
Regards,
Parallels Team
 
Hello,

This issue, as mentioned above, is being caused when "Enable Nested virtualization" is on for Linux virtual machines (M3 and newer).

Note that this has already been submitted to the development team for further investigation at code level.

Regards,
Parallels Team
 
Same problem here.

Host: Macbook Air M4, macOS 26.6.2(25G83), Parallels Desktop 27.0.0 (58628).
Guest: Ubuntu 24.04.4 desktop (ARM64), kernel 6.8.0-138-generic.

The VM hangs immediately after GRUB prints "Loading initial ramdisk ..." and pegs one CPU at 100%. My Windows 11 VM and my Ubuntu 24.04.4 server VM (which had nested virtualization off) both boot fine.

Unchecking "Enable nested virtualization" fixed it, as described above.

Thanks.
 
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