[ovirt-users] oVirt 3.5 on RHEL 6.6 hyperv enabled breaks Windows VMs

[Michal Skrivanek]

On 24 Oct 2014, at 18:43, Markus Stockhausen wrote:

> Hi,
> 
> we are running the hyperv flags since months in our Win7 VMs without any issue. As we are still on OVirt 3.4 FC20 infrastructure we set them with hooks (and really depend on them).
> 
> Maybe RHEL related?
> 
It might be. What's running on your host?

Did you see the same problem with anything newer than Windows XP?

Thanks,
michal
> Markus
> 
> Am 24.10.2014 18:22 schrieb Charles Gruener <cgruener at gruener.us>:
> https://bugzilla.redhat.com/show_bug.cgi?id=1110305
> 
> This enabled the hv_relaxed flag on all my Windows VMs, causing them to no longer boot.  The same thing would happen if I simply booted from the Windows install media.  I would get a screen with a stop error:
> 
> Your PC needs to restart.
> Please hold down the power button.
> Error Code: 0x0000001E
> Parameters:
> 0xFFFFFFFFC0000096
> 0xFFFFF802C4044EA4
> 0x00000000000000000
> 0x00000000000000000
> 
> I created a file called /etc/ovirt-engine/osinfo.conf.d/01-windows.properties that had one line:
> 
> os.windows_xp.devices.hyperv.enabled.value = false
> 
> I restarted ovirt-engine and now I can start my Windows VMs.
> 
> Why does this occur?  Is it because I upgraded from 3.4 to 3.5?  Is there something else I'm doing wrong?  I would like to not need this workaround.  Thanks.
> 
> Charles
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