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[Xen-devel] [RFC PATCH v2 01/17] libxl: fix qemu-trad cmdline for no sdl/vnc case



When qemu is running in stubdomain, any attempt to initialize vnc/sdl
there will crash it (on failed attempt to load a keymap from a file). If
vfb is present, all those cases are skipped. But since
b053f0c4c9e533f3d97837cf897eb920b8355ed3 "libxl: do not start dom0 qemu
for stubdomain when not needed" it is possible to create a stubdomain
without vfb and contrary to the comment -vnc none do trigger VNC
initialization code (just skips exposing it externally).
Change the implicit SDL avoiding method to -nographics option, used when
none of SDL or VNC is enabled.

Signed-off-by: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Jason Andryuk <jandryuk@xxxxxxxxx>
---
Changes in v2:
 - typo in qemu option
---
 tools/libxl/libxl_dm.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/tools/libxl/libxl_dm.c b/tools/libxl/libxl_dm.c
index fdd7fa3..ebe8e0c 100644
--- a/tools/libxl/libxl_dm.c
+++ b/tools/libxl/libxl_dm.c
@@ -475,14 +475,14 @@ static int libxl__build_device_model_args_old(libxl__gc 
*gc,
         if (libxl_defbool_val(vnc->findunused)) {
             flexarray_append(dm_args, "-vncunused");
         }
-    } else
+    } else if (!sdl)
         /*
          * VNC is not enabled by default by qemu-xen-traditional,
-         * however passing -vnc none causes SDL to not be
-         * (unexpectedly) enabled by default. This is overridden by
-         * explicitly passing -sdl below as required.
+         * however skipping -vnc causes SDL to be
+         * (unexpectedly) enabled by default. If undesired, disable graphics at
+         * all.
          */
-        flexarray_append_pair(dm_args, "-vnc", "none");
+        flexarray_append(dm_args, "-nographic");
 
     if (sdl) {
         flexarray_append(dm_args, "-sdl");
-- 
git-series 0.9.1

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