Commit 4171d32e authored by Jes Sorensen's avatar Jes Sorensen Committed by Anthony Liguori
Browse files

Introduce -display none

New option -display none. This option differs from -nographic by not
trying to take control of stdio etc. but instead behaves as if a
graphics display is enabled, except that it doesn't show one.
Signed-off-by: default avatarJes Sorensen <>
Signed-off-by: default avatarAnthony Liguori <>
parent 1472a95b
......@@ -592,7 +592,7 @@ ETEXI
DEF("display", HAS_ARG, QEMU_OPTION_display,
"-display sdl[,frame=on|off][,alt_grab=on|off][,ctrl_grab=on|off]\n"
" [,window_close=on|off]|curses\n"
" [,window_close=on|off]|curses|none\n"
" select display type\n", QEMU_ARCH_ALL)
@item -display @var{type}
......@@ -609,6 +609,12 @@ support a text mode, QEMU can display this output using a
curses/ncurses interface. Nothing is displayed when the graphics
device is in graphical mode or if the graphics device does not support
a text mode. Generally only the VGA device models support text mode.
@item 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.
@end table
......@@ -110,6 +110,7 @@ typedef enum DisplayType
} DisplayType;
extern int autostart;
......@@ -1618,6 +1618,8 @@ static DisplayType select_display(const char *p)
fprintf(stderr, "Curses support is disabled\n");
} else if (strstart(p, "none", &opts)) {
display = DT_NONE;
} else {
fprintf(stderr, "Unknown display type: %s\n", p);
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