From c9d834737fd6972dea3bc2acdd256ca6953f063f Mon Sep 17 00:00:00 2001
From: John Coulter <jbcoulter@ldschurch.org>
Date: Thu, 13 Dec 2012 14:20:09 -0700
Subject: [PATCH] Disable all displays before attempting to call xrandr. 
 Workaround for error "cannot find crtc for output".  See
 https://bugs.freedesktop.org/show_bug.cgi?id=22539 and
 https://bugs.freedesktop.org/show_bug.cgi?id=29929

---
 autorandr | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/autorandr b/autorandr
index c14f5cb..4165bc9 100755
--- a/autorandr
+++ b/autorandr
@@ -164,6 +164,13 @@ config_equal() {
 }
 
 load_cfg_xrandr() {
+	# Disable all displays first. There is a bug in xrandr where trying to enable a different display
+	# when two displays are already attached gives the error "cannot find crtc for output" even
+	# when --off was passed to disable existing displays. If --off is called first as a separate
+	# command the crtcs are freed up for use.
+	# https://bugs.freedesktop.org/show_bug.cgi?id=22539
+	# https://bugs.freedesktop.org/show_bug.cgi?id=29929
+	$XRANDR | grep -P '(^[^ ]+) (dis)?connected' | sed -r 's/(^[^ ]+).*/--output \1 --off/' | xargs $XRANDR
 	sed 's!^!--!' "$1" | xargs $XRANDR
 }