Without this argument, qemu will print an angry message about not being
able to connect to a display server if $DISPLAY is not set.  For me,
that breaks iotests.supported_formats() because it thus only sees
["Could", "not", "connect"] as the supported formats.

Signed-off-by: Max Reitz <mreitz@redhat.com>
---
 tests/qemu-iotests/check | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tests/qemu-iotests/check b/tests/qemu-iotests/check
index f925606cc5..f2a0df8af2 100755
--- a/tests/qemu-iotests/check
+++ b/tests/qemu-iotests/check
@@ -581,13 +581,13 @@ export QEMU_PROG="$(type -p "$QEMU_PROG")"
 
 case "$QEMU_PROG" in
     *qemu-system-arm|*qemu-system-aarch64)
-        export QEMU_OPTIONS="-nodefaults -machine virt,accel=qtest"
+        export QEMU_OPTIONS="-nodefaults -display none -machine virt,accel=qtest"
         ;;
     *qemu-system-tricore)
-        export QEMU_OPTIONS="-nodefaults -machine tricore_testboard,accel=qtest"
+        export QEMU_OPTIONS="-nodefaults -display none -machine tricore_testboard,accel=qtest"
         ;;
     *)
-        export QEMU_OPTIONS="-nodefaults -machine accel=qtest"
+        export QEMU_OPTIONS="-nodefaults -display none -machine accel=qtest"
         ;;
 esac
 
-- 
2.21.0

On 6/25/19 11:19 PM, Max Reitz wrote:
> Without this argument, qemu will print an angry message about not being
> able to connect to a display server if $DISPLAY is not set.  For me,
> that breaks iotests.supported_formats() because it thus only sees
> ["Could", "not", "connect"] as the supported formats.
> 
> Signed-off-by: Max Reitz <mreitz@redhat.com>

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

> ---
>  tests/qemu-iotests/check | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/tests/qemu-iotests/check b/tests/qemu-iotests/check
> index f925606cc5..f2a0df8af2 100755
> --- a/tests/qemu-iotests/check
> +++ b/tests/qemu-iotests/check
> @@ -581,13 +581,13 @@ export QEMU_PROG="$(type -p "$QEMU_PROG")"
>  
>  case "$QEMU_PROG" in
>      *qemu-system-arm|*qemu-system-aarch64)
> -        export QEMU_OPTIONS="-nodefaults -machine virt,accel=qtest"
> +        export QEMU_OPTIONS="-nodefaults -display none -machine virt,accel=qtest"
>          ;;
>      *qemu-system-tricore)
> -        export QEMU_OPTIONS="-nodefaults -machine tricore_testboard,accel=qtest"
> +        export QEMU_OPTIONS="-nodefaults -display none -machine tricore_testboard,accel=qtest"
>          ;;
>      *)
> -        export QEMU_OPTIONS="-nodefaults -machine accel=qtest"
> +        export QEMU_OPTIONS="-nodefaults -display none -machine accel=qtest"
>          ;;
>  esac
>  
>