[libvirt] [PATCH 0/4]use newer video device by -device in qemu commandline

[Guannan Ren]

On 12/10/2012 05:37 PM, Gerd Hoffmann wrote:
>    Hi,
>
>> For backwards
>> compatibility, if a certain qemu version does not support one of the above
>> video device arguments to -device or even -device itself, the -vga will still
>> be used.
> That will not work.  You must check the qemu version.  1.2+ is safe,
> IIRC 1.1 will work too.
>
> Technical background: '-device VGA' (+variants) exists for a looooooong
> time, pretty much day one of the -device switch.  Actually using it did
> not work though due to a nasty initialization order issue in qemu.  The
> qemu memory api created by avi fixed it.
>
> cheers,
>    Gerd
>

      Okay,  if so, I prefer 1.2+ to ensure -device VGA work as expected.
      A question here, all of these four vga device (VGA, cirrus-vga, 
vmware-svga, qxl-vga)
      has existed and been supported since 1.2 QEMU version, is it 
right? If so, libvirt
      doesn't need to check for them individually.

      Guannan