[Qemu-discuss] Installed Ubuntu 14.04 and now getting "unknown OS type hvm" on my old VMs.

[Hans Deragon]

Greetings,

I installed Ubuntu 14.04 64 bits and am now getting "unknown OS type
hvm" when I try 'virsh define <servername>' on my old VMs.

A search trough the web suggest that kernel modules are not loaded.  I
my case, they are:

# lsmod | fgrep kvm
kvm_intel             143109  0
kvm                   451511  1 kvm_intel

Other suggest that the BIOS is not configured for Virtualization. My old
Ubuntu 12.04 64 bits is still available via dualboot, and the same VMs
start fine under it.  It is not the BIOS.

My system supports 'vmx' (it is a DX58SO Intel motherboard support VT-d.

# egrep "^flags" /proc/cpuinfo  | fgrep --color vmx^
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall
nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology
nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16
xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm ida dtherm tpr_shadow vnmi
flexpriority ept vpid

I spent an hour looking through the web to no avail.  Anybody can tell
me what the problem is and why my VMs work under 12.04 but not on 14.04,
on the same hardware and same BIOS settings?  I am out of options here;
it should work.

My system is fully updated with the latest packages.  Could there be a
dependency missing (forgotten in a .deb)?

# uname -a
Linux <servername> 3.13.0-36-generic #63-Ubuntu SMP Wed Sep 3 21:30:07
UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

Best regards,
Hans Deragon