Re: GNOME Shell/Wayland, VirtualBox and absolute input

[Michael Thayer <michael thayer oracle com>]

First answer to self.  Sorry for the double initial message!  I should
know not to write to a mailing list on an unstable Internet connection...

06.12.2016 17:31, Michael Thayer wrote:
> I am looking for a solution to the following problem: when I run
> Fedora 25 with GNOME Shell/Wayland and multiple monitors under
> VirtualBox and install Guest Additions absolute input mapping does
> not work correctly: the first screen as seen from the host is mapped
> to the entire guest virtual desktop, and that only when the first
> screen is in the top left corner of the virtual desktop.
[...]
I will try for a start using suggested_x and _y from inside the driver 
to encourage the compositor to use a layout we are aware of.  Not ideal, 
but hopefully it will work in more cases than we have now.

> Another issue I am looking at is that GNOME Shell does not seem to
> use drm dirtyfb information to tell the driver about updates.
> However virtio-gpu seems to get the information, so presumably there
> is something I can do about this.  Any idea about what I should be
> doing differently?  And (small complaint) the fact that GNOME Shell
> does not do a soft mouse cursor makes debugging pointer issues
> somewhat painful...
[...]
Running gnome-shell under Qemu/virtio-gpu 2D in gdb you seem to be doing 
page flips even without acceleration.  I suspect that might have rather 
bad performance, but it is probably not your highest priority use case.

Regards,

Michael
--
Michael Thayer | VirtualBox engineer
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