QEMU VM: Version 2.8 Won't Boot

nickf1227 · Apr 21, 2025, 7:11 PM

@jimp Hey man, thanks for your reply

That screenshot comes from the console itself while its booting, a-la a display device/VNC. Happy to give it another go with a serial connection, but I dont think thats possible without a virtio-VM agent?

jimp · Apr 21, 2025, 7:19 PM

@nickf1227 said in QEMU VM: Version 2.8 Won't Boot:

@jimp Hey man, thanks for your reply

That screenshot comes from the console itself while its booting, a-la a display device/VNC. Happy to give it another go with a serial connection, but I dont think thats possible without a virtio-VM agent?

I'm not sure what all might be available on TrueNAS but at least on Proxmox for a serial console on a guest you run qm terminal <id> from the Proxmox host (e.g. over ssh). IIRC that's just part of qemu-server so it may be there already.

It may not be printing anything there but it's good to rule it out at least.

stephenw10 · Apr 23, 2025, 4:18 PM

Since you're hitting this locally try setting the loader value: debug.acpi.disabled="pci"

It looks like this is an ACPI bug preventing the OS finding the PCI devices. Setting that falls back to probing the bus/tree.

I expect it to still fail but the changes output would be useful in diagnosing the problem.

Edit: Actually that seems to prevent any detection in Q35....

netblues

@stephenw10 Finally its all related to uefi.
Booting via bios to q35 and newer freebsd leads to missing virtio interfaces.

Reinstalling with uefi boot makes virtio interfaces available.
This is probably an upgade nightmare, since there is no warning.
A warning can be easily added by checking if an update is on q35 without uefi boot.

Just an idea

stephenw10

It's a bug in the ACPI driver that happened to be present when we branched 25.03 and 2.8: https://reviews.freebsd.org/D48285

We picked back the fix two weeks ago it should be in the current public beta (May 10th). Are you testing that?

netblues

@stephenw10 So you are saying that q35 with bios boot would work?
I need to boot 2.8 beta first under q35.
If the fix isn't there how can I test it?

stephenw10

Yes as I understand it that issue is fixed in the May 10th 2.8 beta. I assume you were testing with an earlier beta version?

chrcoluk

@stephenw10 Since this is a pretty nasty issue, I will try to test myself, but 2.8 beta is as an update only release still right? no installer. This will delay things a bit but will test as soon as possible, using q35, and full virtio.

marcosm

@chrcoluk It can be installed fresh using the Netgate Installer.

chrcoluk

@marcosm said in QEMU VM: Version 2.8 Won't Boot:

@chrcoluk It can be installed fresh using the Netgate Installer.

Ok so I grabbed the latest netgate installer amd64 ISO, this will have an option for 2.8.0?

I will do it over the weekend.

stephenw10

Yes you can choose 2.8.0-beta from the installer menu.

Edit: Now 2.8.0-RC