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Re: [PATCH] ui/console: Display the 'none' backend in '-display help'

From: Gerd Hoffmann
Subject: Re: [PATCH] ui/console: Display the 'none' backend in '-display help'
Date: Tue, 21 Jan 2020 07:30:08 +0100

On Mon, Jan 20, 2020 at 08:29:47PM +0100, Philippe Mathieu-Daudé wrote:
> Commit c388f408b5 added the possibility to list the display
> backends using '-display help'. Since the 'none' backend is
> is not implemented as a DisplayChangeListenerOps, it is not
> registered to the dpys[] array with qemu_display_register(),
> and is not listed in the help output.
> This might be confusing, as we list it in the man page:
>   -display type
>       Select type of display to use. This option is a replacement for
>       the old style -sdl/-curses/... options. Valid values for type are
>       none
>           Do not display video output. The guest will still see an
>           emulated graphics card, but its output will not be displayed
>           to the QEMU user. This option differs from the -nographic
>           option in that it only affects what is done with video
>           output; -nographic also changes the destination of the serial
>           and parallel port data.
> Fix by manually listing the special 'none' backend in the help.
> Suggested-by: Thomas Huth <address@hidden>
> Signed-off-by: Philippe Mathieu-Daudé <address@hidden>

Added to ui queue.


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