From bf12befd6dd54c6cb0a66d6355acc35f4a783d93 Mon Sep 17 00:00:00 2001
From: Michael Stapelberg <michael@stapelberg.de>
Date: Mon, 7 Nov 2011 23:07:08 +0000
Subject: [PATCH] lib/StartXDummy.pm: document why we use -config /dev/null

---
 testcases/lib/StartXDummy.pm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/testcases/lib/StartXDummy.pm b/testcases/lib/StartXDummy.pm
index 8657ba9d..36b9e006 100644
--- a/testcases/lib/StartXDummy.pm
+++ b/testcases/lib/StartXDummy.pm
@@ -54,6 +54,9 @@ sub start_xdummy {
             # Child, close stdout/stderr, then start Xdummy.
             POSIX::close(0);
             POSIX::close(2);
+            # We use -config /dev/null to prevent Xdummy from using the system
+            # Xorg configuration. The tests should be independant from the
+            # actual system X configuration.
             exec './Xdummy', ":$displaynum", '-config', '/dev/null';
             exit 1;
         }
-- 
2.39.5