Re: [Qemu-devel] [PATCH] qxl: Export "mode" as a property

[Alexander Larsson <alexl@redhat.com>]

On tis, 2012-11-20 at 10:15 +0100, Gerd Hoffmann wrote:
> On 11/20/12 10:07, Daniel P. Berrange wrote:
> > On Tue, Nov 20, 2012 at 08:50:09AM +0100, Gerd Hoffmann wrote:
> >> On 11/19/12 14:11, Alexander Larsson wrote:
> >>> This way you can easily tell from qemu if the guest is using
> >>> a qxl driver or not.
> >>
> >> Device properties are for configuration, not inspection.
> > 
> > Sounds like we need to expose something via the monitor to let admin
> > apps discover if QXL has been enabled with SPICE vs plain VGA compat
> > mode only.  This is useful for apps to know, so that they can tell
> > the user that something is wrong performance wise, if the OS is
> > expected to have QXL present but does not.
> 
> Adding this to "info spice" is an option.  This has been discussed in
> the past.  IIRC we didn't actually implement it as there was not clear
> whenever this is actually needed or whenever management will handle this
> using the guest agent anyway.  Alon?

I'm working on a kind of "troubleshooting log" option for gnome-boxes
which wants to record all these kinds of data so that a helpdesk or a
developer can help figuring out a problem with a guest. Knowing if a qxl
driver is in use is an important piece of information. Additionally it
would be very nice if the driver could report a version string that I
could query (same for virtio driver, etc).