Re: [Xen-devel] Wondering about cirris and stdvga

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Fri, Mar 17, 2017 at 10:19:47AM -0400, Konrad Rzeszutek Wilk wrote:
> On Fri, Nov 25, 2016 at 07:17:31PM +0100, Dario Faggioli wrote:
> > On Mon, 2016-11-21 at 10:04 +0100, Dario Faggioli wrote:
> > > On Sat, 2016-11-19 at 12:56 +0200, Pasi Kärkkäinen wrote:
> > > > 2) It'd good to create an upstream Wayland bugreport and
> > > > investigate
> > > > more about why cirrus is broken with Wayland.
> > > > 
> > > Sure, I can do that.
> > > 
> > An update.
> > 
> > The discussion here has gone on a bit:
> > https://bugzilla.redhat.com/show_bug.cgi?id=1227770
> > 
> > The conclusion seems to be that:
> > "cirrus (virtual) hardware is simply to old to run wayland."
> > 
> > And so this is (and will very likely remain) a 'WONTFIX' for cirrus, at
> > least on Fedora.
> > 
> > I've also opened a thread on wayland-devel mailing list:
> > https://lists.freedesktop.org/archives/wayland-devel/2016-November/0318
> > 56.html
> > 
> > There, I learned that Wayland is not the component to blame, as Wayland
> > is the protocol. So, in our case, the 'bug' is most likely in
> > gnome-shell / Mutter.
> > 
> > That's not a good thing, though. In fact, just to cite a few sentences
> > from the thread:
> > 
> > "Packed 24bpp is going to be pain, not least because I don't know of
> > any clients which render in packed-24"
> > 
> > "The 24bpp paths in pretty much everything are also badly untested, so
> > that's asking for trouble."
> > 
> > "you will need to test and fix every single Wayland compositor out
> > there."
> > 
> > "I really think you'd be far far better off trying to figure out how to
> > move off the legacy Cirrus emulation as soon as you can."
> > 
> > So, we can try seeing if I manage to get some logs out of Mutter to
> > figure out the actual bug more precisely _but_, considering all that
> > people have said both here and in the other forums, I think it would be
> > better to spend that time figuring out how to switch (and document this
> > for 4.8 and previous version, of course).
> 
> 
> Yes. Also as there does not seem to be any supported OS that 
> _needs_ the old Cirrus OS to boot and function.

Not that I oppose to change to stdvga, but what would happen to Windows VMs
that suddenly change from cirrus to stdvga, is that going to trigger the
license invalidation stuff? AFAIK this happens when you change hardware, but
maybe a VGA change doesn't trigger that because it's common for people to
upgrade VGA cards?

Roger.

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