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-rw-r--r--ui/spice-display.c26
1 files changed, 22 insertions, 4 deletions
diff --git a/ui/spice-display.c b/ui/spice-display.c
index 2f8adb6b9f..52f8cb5ae1 100644
--- a/ui/spice-display.c
+++ b/ui/spice-display.c
@@ -674,10 +674,28 @@ static int interface_client_monitors_config(QXLInstance *sin,
 
     memset(&info, 0, sizeof(info));
 
-    head = qemu_console_get_head(ssd->dcl.con);
-    if (mc->num_of_monitors > head) {
-        info.width  = mc->monitors[head].width;
-        info.height = mc->monitors[head].height;
+    if (mc->num_of_monitors == 1) {
+        /*
+         * New spice-server version which filters the list of monitors
+         * to only include those that belong to our display channel.
+         *
+         * single-head configuration (where filtering doesn't matter)
+         * takes this code path too.
+         */
+        info.width  = mc->monitors[0].width;
+        info.height = mc->monitors[0].height;
+    } else {
+        /*
+         * Old spice-server which gives us all monitors, so we have to
+         * figure ourself which entry we need.  Array index is the
+         * channel_id, which is the qemu console index, see
+         * qemu_spice_add_display_interface().
+         */
+        head = qemu_console_get_index(ssd->dcl.con);
+        if (mc->num_of_monitors > head) {
+            info.width  = mc->monitors[head].width;
+            info.height = mc->monitors[head].height;
+        }
     }
 
     trace_qemu_spice_ui_info(ssd->qxl.id, info.width, info.height);