Re: [Qemu-devel] Re: [6322] add a -vga none cli option (Stefano Stabellini)

["Daniel P. Berrange" <berrange@redhat.com>]

On Sun, Jan 18, 2009 at 10:39:58PM +0100, Sebastian Herbszt wrote:
> Anthony Liguori wrote:
> >Revision: 6322
> >         http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6322
> >Author:   aliguori
> >Date:     2009-01-15 20:37:28 +0000 (Thu, 15 Jan 2009)
> >
> >Log Message:
> >-----------
> >add a -vga none cli option (Stefano Stabellini)
> >
> >currently there is no way to fully disable any graphic card device for
> >the PC architecture.
> >You can have no graphical output, thanks to -nographic, but you would
> >have the VGA device connected to your PCI bus anyway.
> >There is already a convenient -vga option to choose between std, cirrus
> >and vmware; this patch add the new option "none" to select no graphic
> >card at all.
> 
> I just tried this with r6367 on WinXP and SDL support as
> 
> qemu.exe -L . -hda dummy.img -vga none
> 
> and it made qemu crash. This happens on the call to
> "sdl_display_init(ds, full_screen, no_frame);" in vl.c.
> 
> Maybe "-vga none" should imply "-nographic" ?

The VGA adapter isn't the only thing being displayed on the SDL/VNC
display - you potentially have the monitor console, and serial / parallel
devices & anything else that's using one of QEMU's text consoles. So it 
is correct that '-vga none' is independant of '-nographic' & thus it is 
neccessary to fix the crash seen.

Regards,
Daniel
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