DispVM does not work anymore

[mitte...@digitrace.de]

Hey there,

today I noticed that my dispVM is no longer working (not in Dom0 and not
in AppVMs). There is the notification that the DispVM starts, but
nothing shows up.
If I start the internal fedora-23-dvm I boots up without any problems
and also allows me to start tools (e.g. Firefox)

any idea what is wrong?

Thanks

[Ángel]

I suspect you too may be suffering
https://github.com/QubesOS/qubes-issues/issues/2182

Look at /var/log/libvirt/libxl/libxl-driver.log and see if there is a
line like
xc: error: X86_PV_VCPU_MSRS record truncated: length 8, min 9: Internal
error

The reason that directly booting the dvn works is that the problem lies
in restoring the savefile (and the buggy creation of it).

There are some patches fixing it, but you would need to recompile xen :/

Best regards

[raah...@gmail.com]

open qubes-manager window. click view and show internal vms. Then remove the dvm qube.

then in a dom0 terminal make a new one. qvm-create-default-dvm fedora-24.

[Robert Mittendorf]

> I suspect you too may be suffering
> https://github.com/QubesOS/qubes-issues/issues/2182
>
> Look at /var/log/libvirt/libxl/libxl-driver.log and see if there is a
> line like
> xc: error: X86_PV_VCPU_MSRS record truncated: length 8, min 9: Internal
> error
>
> The reason that directly booting the dvn works is that the problem lies
> in restoring the savefile (and the buggy creation of it).
>
> There are some patches fixing it, but you would need to recompile xen :/

/var/log/libvirt/libxl
(dom0) contains only 2 empty folders ("dump" and "save")

raahelps suggestion to recreate the dvm worked