From e37c1f5f5741450ba6233d4301b6222b67f7fc22 Mon Sep 17 00:00:00 2001
From: Martin Whitaker <mageia@martin-whitaker.me.uk>
Date: Sat, 16 Mar 2019 12:10:36 +0000
Subject: Add 'xclone' boot option to control Xorg default configuration
 (mga#24469).

---
 NEWS                   | 2 ++
 lib/Xconfig/various.pm | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/NEWS b/NEWS
index 85a9a4f..1c06686 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,5 @@
+- add 'xclone' boot option to control Xorg default configuration (mga#24469)
+
 Version 1.25 - 4 November 2018
 
 - fix setting systemd default.target to requested runlevel (mga#22593)
diff --git a/lib/Xconfig/various.pm b/lib/Xconfig/various.pm
index 7d245f2..114390f 100644
--- a/lib/Xconfig/various.pm
+++ b/lib/Xconfig/various.pm
@@ -49,6 +49,8 @@ sub default {
 
     my $isLaptop = detect_devices::isLaptop();
 
+    my ($clone) = cat_("/proc/cmdline") =~ /.*\bxclone=(\S+)/;
+
     add2hash_($various, { 
 	isLaptop => $isLaptop,
 	xdm => 1,
@@ -59,6 +61,7 @@ sub default {
 	if_($card->{Driver} eq 'savage', HWCursor => 1),
 	if_($card->{Driver} eq 'intel' && $isLaptop, Clone => 0),
 	if_($card->{Driver} eq 'ati' && $isLaptop, Clone => 1, BIOSHotkeys => 0),
+	if_(defined $clone, Clone => $clone), # overrides driver-specific default
 	if_(exists $card->{DRI_GLX}, use_DRI_GLX => $card->{DRI_GLX} && !$card->{Xinerama}),
 	if_(member($card->{Driver}, qw(i128 ati sis trident via savage)), EXA => 0), #- list taken from http://wiki.x.org/wiki/ExaStatus
     });
-- 
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