[PATCH] xfree86/modes: Be sure to only use new EDID for physical output dimensions

Evan Broder ebroder at mokafive.com
Fri Jan 7 19:10:23 PST 2011

The EDID processing regards physical dimensions of 0mm x 0mm as
invalid. Previously the old values for height and width would be
preserved if none of the physical dimension specifications in the new
EDID were considered valid.

This will come up in particular if first a monitor is connected to an
output, and then a projector is connected. Since projectors generally
report physical dimensions of 0mm x 0mm, this would result in the
projector claiming to have the physical dimensions of the monitor.

Signed-off-by: Evan Broder <ebroder at mokafive.com>
 hw/xfree86/modes/xf86Crtc.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/hw/xfree86/modes/xf86Crtc.c b/hw/xfree86/modes/xf86Crtc.c
index c4470c3..47d3ad1 100644
--- a/hw/xfree86/modes/xf86Crtc.c
+++ b/hw/xfree86/modes/xf86Crtc.c
@@ -3016,6 +3016,8 @@ xf86OutputSetEDID (xf86OutputPtr output, xf86MonPtr edid_mon)
     output->MonInfo = edid_mon;
+    output->mm_width = 0;
+    output->mm_height = 0;
     if (debug_modes) {
 	xf86DrvMsg(scrn->scrnIndex, X_INFO, "EDID for output %s\n",

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