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-rw-r--r--Xext/sync.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/Xext/sync.c b/Xext/sync.c
index 7ea8a44fa..d495116dc 100644
--- a/Xext/sync.c
+++ b/Xext/sync.c
@@ -2793,6 +2793,14 @@ IdleTimeBlockHandler(pointer env, struct timeval **wt, pointer LastSelectMask)
break;
}
}
+ /*
+ * We've been called exactly on the idle time, but we have a
+ * NegativeTransition trigger which requires a transition from an
+ * idle time greater than this. Schedule a wakeup for the next
+ * millisecond so we won't miss a transition.
+ */
+ if (XSyncValueEqual (idle, *pIdleTimeValueLess))
+ AdjustWaitForDelay(wt, 1);
}
else if (pIdleTimeValueGreater)
{