[Qemu-devel] Multiple monitors

[Qemu-devel] Multiple monitors

[tom289332]

Hello,

What are the possible ways to use multiple monitors with qemu (running locally)?

(I asked this on qemu-discuss last week, but got no responses, so I'm trying here.)

I read somewhere that spice supports multiple monitors. But I'm worried that 
with spice being network-based, it won't be fast enough for video playback 
(I've tried vnc, and it was too slow). Is it possible to have one monitor use 
sdl and the other to use spice/vnc/anything?

And I saw somewhere something about multiple monitors in sdl2, but I can't find 
anything relevant in the manpage. Does sdl2 support multiple monitors?

I appreciate any other suggestions or solutions too.

Thanks!

Re: [Qemu-devel] Multiple monitors

[Gerd Hoffmann]

On Fr, 2015-04-17 at 12:45 -0400, tom289332@Safe-mail.net wrote:
> Hello,
> 
> What are the possible ways to use multiple monitors with qemu (running locally)?

> (I asked this on qemu-discuss last week, but got no responses, so I'm trying here.)
> 
> I read somewhere that spice supports multiple monitors. But I'm worried that 
> with spice being network-based, it won't be fast enough for video playback 
> (I've tried vnc, and it was too slow). Is it possible to have one monitor use 
> sdl and the other to use spice/vnc/anything?

For a multihead setup easiest is spice+qxl indeed.  virtio-gpu will be
able to do that too, but it isn't merged yet.

For multiseat see docs/multiseat.txt

> And I saw somewhere something about multiple monitors in sdl2, but I can't find 
> anything relevant in the manpage. Does sdl2 support multiple monitors?

Yes.  With sdl/vnc you can switch between monitors using hotkeys.  with
sdl2 you get a separate window.  gtk allows both (switching using
hotkeys or tabs, but also showing tabs as separate windows).

cheers,
  Gerd