On 05/21/2017 02:22 AM, Vít Šesták wrote:
> Getting rid of seamless mode: HVM is one approach, loopback VNC or Xvfb is 
> another one.
> On pausing VMs: Actually, even if you just suspend and resume the whole 
> system, all VMs get unpaused.
> Xen actually has some restore capability, at least for PVs and maybe also for 
> HVMs. This one is actually used in today's DVM implementation (as of 3.2), 
> but it will AFAIK be handled differently in Qubes 4. The problem is it is 
> hard to make it working properly with template-based VMs without additional 
> restrictions and without counterintuitive impact on performance (like 
> hibernated VMs affecting TemplateVM performance). See 
> https://github.com/QubesOS/qubes-issues/issues/832#issuecomment-289100070 .
> So, if you want hibernation, you can use a standalone VM. Such VM can handle 
> everything on its own without involving Qubes (provided that the OS supports 
> hibernation). I am not sure if hibernation will work well with standalone PV, 
> but with standalone HVM, I see no reason why it should not work.
> Regards,
> Vít Šesták 'v6ak'

I'm curious:  Would hibernation work correctly if the VM were paused
first? I don't use suspend or hibernation myself, so I don't know the
answer to that.

Of course, in the current Qubes kernel configuration, Hibernation
support isn't even enabled in the kernel, so I suppose it's currently a
moot point.

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