underrun is an event, so don't use the timestamp if we are still in t…

…his state

git-svn-id: https://xpra.org/svn/Xpra/trunk@17286 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/xpra/sound/sink.py

@@ -256,9 +256,11 @@ def set_min_level(self):
             return
         try:
             cmtt = self.queue.get_property("min-threshold-time")//MS_TO_NS
-            #from 100% down to 0% in 2 seconds after underrun:
-            now = monotonic_time()
-            pct = max(0, int((self.last_underrun+2-now)*50))
+            if self.queue_state=="underrun":
+                pct = 100
+            else:
+                #from 100% down to 0% in 2 seconds after underrun:
+                pct = max(0, int((self.last_underrun+2-now)*50))
             #cannot go higher than mst-50:
             mst = self.queue.get_property("max-size-time")
             mrange = max(lrange+100, 150)