enable modify display resolution in virtual machine
diff --git a/ui/ozone/platform/drm/common/drm_util.cc b/ui/ozone/platform/drm/common/drm_util.cc
index 0c78e5f..7538ba5 100644
--- a/ui/ozone/platform/drm/common/drm_util.cc
+++ b/ui/ozone/platform/drm/common/drm_util.cc
@@ -126,6 +126,7 @@
     case DRM_MODE_CONNECTOR_DVIA:
       return display::DISPLAY_CONNECTION_TYPE_DVI;
     case DRM_MODE_CONNECTOR_VIRTUAL:
+      return display::DISPLAY_CONNECTION_TYPE_UNKNOWN;
       // A display on VM is treated as an internal display.
     case DRM_MODE_CONNECTOR_LVDS:
     case DRM_MODE_CONNECTOR_eDP: