As per advice from Singularity devs, set is_display_name_default = true in GetDisplayName cap return data to make the single name appear.

This is still always your avatar name - code to set a different display is not yet implemented.
This works from my testing with current Firestorm and Singuarity releases.

1 files changed, 1 insertions, 1 deletions

diff --git a/OpenSim/Capabilities/Handlers/GetDisplayNames/GetDisplayNamesHandler.cs b/OpenSim/Capabilities/Handlers/GetDisplayNames/GetDisplayNamesHandler.cs
index 0353d9d..589602d 100644
--- a/OpenSim/Capabilities/Handlers/GetDisplayNames/GetDisplayNamesHandler.cs
+++ b/OpenSim/Capabilities/Handlers/GetDisplayNames/GetDisplayNamesHandler.cs
@@ -99,7 +99,7 @@ namespace OpenSim.Capabilities.Handlers
                         osdname["legacy_last_name"] = parts[1];
                         osdname["username"] = OSD.FromString(name);
                         osdname["id"] = OSD.FromUUID(uuid);
-                        osdname["is_display_name_default"] = OSD.FromBoolean(false);
+                        osdname["is_display_name_default"] = OSD.FromBoolean(true);
 
                         agents.Add(osdname);
                     }