This property represents the globally-unique identifier of the connected
display, if one is available.

Signed-off-by: Aaron Plattner <[email protected]>
Reviewed-by: Andy Ritger <[email protected]>
---
 randr.h        |    1 +
 randrproto.txt |   12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/randr.h b/randr.h
index 9cb9403..53e2660 100644
--- a/randr.h
+++ b/randr.h
@@ -183,5 +183,6 @@ typedef unsigned long       XRandrModeFlags;
 #define RR_PROPERTY_CLONE_LIST         "CloneList"
 #define RR_PROPERTY_BORDER             "Border"
 #define RR_PROPERTY_BORDER_DIMENSIONS  "BorderDimensions"
+#define RR_PROPERTY_GUID               "GUID"
 
 #endif /* _RANDR_H_ */
diff --git a/randrproto.txt b/randrproto.txt
index e90b1cd..2190540 100644
--- a/randrproto.txt
+++ b/randrproto.txt
@@ -1856,6 +1856,17 @@ doesn't handle a mandatory property correctly.
          2 = left/right and top/bottom borders can be specified independently
          4 = all four borders can be specified independently
 
+    "GUID"                     aka RR_PROPERTY_GUID
+       Type:                   INTEGER
+       Format:                 8
+       Num items:              16
+       Flags:                  Immutable
+       Range/List:             -
+
+       Some display devices, such as DisplayPort 1.2 devices, have globally
+       unique identifiers.  When such an identifier is available, this property
+       contains its raw bytes.
+
 
 9.2 Properties introduced with version 1.2 of the RandR extension
 
@@ -1889,6 +1900,7 @@ Property                  Immutable       Mandatory since
 ────────                       ─────────       ───────────────
 Border                         yes             not mandatory
 BorderDimensions               yes: static     not mandatory
+GUID                           yes             not mandatory
 
                              ❧❧❧❧❧❧❧❧❧❧❧
 
-- 
1.7.9.5

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