kvm_intel is not working on pve5.1 for older cpu

[Pmx1]

Hi,
I have a intel core 2 duo T7200 dell inspiron where I am installing pve5.1, where I see modprobe kvm_intel fails, whereas if I install pve4.4 I could see kvm_intel in lsmod and even nested virtualization works too.
Hence I would know is there a kernel patch from pve available for this issue?

pve5.1 error:
root@pve:~# modprobe kvm
root@pve:~# modprobe kvm_intel
modprobe: ERROR: could not insert 'kvm_intel': Input/output error

pve4.4:
root@pve:~# echo "options kvm-intel nested=Y" > /etc/modprobe.d/kvm-intel.conf ^C
root@pve:~# cat /etc/modprobe.d/kvm-intel.conf
cat: /etc/modprobe.d/kvm-intel.conf: No such file or directory
root@pve:~# echo "options kvm-intel nested=Y" > /etc/modprobe.d/kvm-intel.conf
root@pve:~# modprobe -r kvm_intel
root@pve:~# modprobe kvm_intel
root@pve:~#
root@pve:~# cat /sys/module/kvm_intel/parameters/nested
Y
root@pve:~# lsmod | grep kvm
kvm_intel 172032 0
kvm 544768 1 kvm_intel
irqbypass 16384 1 kvm
root@pve:~#


Many thanks!

 

[fabian]

see https://forum.proxmox.com/threads/pve-5-1-kvm-broken-on-old-cpus.37666/

 

[Pmx1]

Thanks for those pointers and quick response!!