[SOLVED] kvm virtualization suddenly not available after reboot

[Por12]

Hi there,

Two days ago I turned off one of the machines in my cluster (a HP Prodesk, that had been working flawlessly for weeks). Today I turned the machine back on and I am not able to start any VM. I get the following error:

TASK ERROR: KVM virtualisation configured, but not available. Either disable in VM configuration or enable in BIOS.
Obviously the machine supports virtualization as it was running VMs until before the last shut down. I did not update the machine before powering it off.

If I try to run "grep -R "" /sys/module/kvm_intel/parameters" I get the following error: No such file or directory

Here is my PVE Version :

proxmox-ve: 8.1.0 (running kernel: 6.5.11-7-pve)
pve-manager: 8.1.3 (running version: 8.1.3/b46aac3b42da5d15)
proxmox-kernel-helper: 8.1.0
pve-kernel-6.2: 8.0.5
proxmox-kernel-6.5: 6.5.11-7
proxmox-kernel-6.5.11-7-pve-signed: 6.5.11-7
proxmox-kernel-6.2.16-20-pve: 6.2.16-20
proxmox-kernel-6.2: 6.2.16-20
proxmox-kernel-6.2.16-19-pve: 6.2.16-19
proxmox-kernel-6.2.16-18-pve: 6.2.16-18
ceph-fuse: 17.2.6-pve1+3
corosync: 3.1.7-pve3
criu: 3.17.1-2
glusterfs-client: 10.3-5
ifupdown2: 3.2.0-1+pmx7
ksm-control-daemon: 1.4-1
libjs-extjs: 7.0.0-4
libknet1: 1.28-pve1
libproxmox-acme-perl: 1.5.0
libproxmox-backup-qemu0: 1.4.1
libproxmox-rs-perl: 0.3.3
libpve-access-control: 8.0.7
libpve-apiclient-perl: 3.3.1
libpve-common-perl: 8.1.0
libpve-guest-common-perl: 5.0.6
libpve-http-server-perl: 5.0.5
libpve-network-perl: 0.9.5
libpve-rs-perl: 0.8.7
libpve-storage-perl: 8.0.5
libspice-server1: 0.15.1-1
lvm2: 2.03.16-2
lxc-pve: 5.0.2-4
lxcfs: 5.0.3-pve4
novnc-pve: 1.4.0-3
proxmox-backup-client: 3.1.2-1
proxmox-backup-file-restore: 3.1.2-1
proxmox-kernel-helper: 8.1.0
proxmox-mail-forward: 0.2.2
proxmox-mini-journalreader: 1.4.0
proxmox-widget-toolkit: 4.1.3
pve-cluster: 8.0.5
pve-container: 5.0.8
pve-docs: 8.1.3
pve-edk2-firmware: 4.2023.08-2
pve-firewall: 5.0.3
pve-firmware: 3.9-1
pve-ha-manager: 4.0.3
pve-i18n: 3.1.5
pve-qemu-kvm: 8.1.2-6
pve-xtermjs: 5.3.0-3
qemu-server: 8.0.10
smartmontools: 7.3-pve1
spiceterm: 3.3.0
swtpm: 0.8.0+pve1
vncterm: 1.8.0
zfsutils-linux: 2.2.2-pve1

The VM processor is set up (and always has been) as kvm64.
Any ideas?

Thanks in advance.

SOLVED: CMOS battery was empty and by default BIOS had virtualization options off.

 

[dcsapak]

can you post the output of 'dmesg' and check in your bios if the option is turned on? e.g. a bios upgrade or loss of power can sometimes reset that option there

 

[Por12]

Thanks! Will check the BIOS setting on the weekend.

Regarding the dmesg command, I found one error that indeed suggests that it has somehow been disabled by BIOS

"[ 0.152680] x86/cpu: VMX (outside TXT) disabled by BIOS"

I found another error that seems bad!

"Failed to start zfs-import@rust\x2dolivar.service - Import ZFS pool rust\x2dolivar."

Here is the full output from the command on pastebin as it's too long to be directly pasted: https://pastebin.com/TAc93AEx.

Thanks!

 

[leesteken]

Thanks! Will check the BIOS setting on the weekend.

Regarding the dmesg command, I found one error that indeed suggests that it has somehow been disabled by BIOS

Maybe the CMOS battery is empty and setting are not saved when the power is off?

 

[Por12]

That could very well be the issue. I turned the system off because there was some work being done on the electrical system so I went without power for a while. And now I remember that I took a while to power on after I pressed the button.

I'll report back. Thanks.

 

[Por12]

Well, it definitely was a case of empty CMOS battery. BIOS had no date and the virtualization options off.

Thanks for the hint.