diff --git a/Linux/sgml/Makefile.sgml b/Linux/sgml/Makefile.sgml
new file mode 100644
index 00000000..375a50e2
--- /dev/null
+++ b/Linux/sgml/Makefile.sgml
@@ -0,0 +1,6 @@
+# sgml tools are from linuxdoc-tools
+default: README.sgml
+ sgml2html -s 0 -T 2 README.sgml 2>/dev/null
+all: default text
+text txt: README.sgml
+ sgml2rawtxt README
diff --git a/README.sgml b/Linux/sgml/README.sgml
similarity index 97%
rename from README.sgml
rename to Linux/sgml/README.sgml
index ba9fe802..b439bdc7 100644
--- a/README.sgml
+++ b/Linux/sgml/README.sgml
@@ -4,7 +4,7 @@
@@ -85,7 +85,9 @@ Alternatively, have a look at
-Some versions of Xorg and SDL have brightness issues. If you have Xorg >= 7.5 and broken brightness,
+Some versions of Xorg and SDL have brightness issues.
+
+OS X has a well known gamma issue where the screen turns dark, but we currently have no fix.
+
diff --git a/Linux/sgml/sgml2rawtxt b/Linux/sgml/sgml2rawtxt
new file mode 100755
index 00000000..d87d2d36
--- /dev/null
+++ b/Linux/sgml/sgml2rawtxt
@@ -0,0 +1,4 @@
+#!/bin/bash
+sgml2txt -b 2 "$1"
+cat "$1.txt" | sed -e 's/[^m]*m//g' -e 's/.//g' >tmp$$
+mv tmp$$ "$1.txt"
diff --git a/README.html b/README.html
index d4c24b08..0a020daa 100644
--- a/README.html
+++ b/README.html
@@ -12,7 +12,7 @@
Page last edited Oct. 12, 2013
+Page last edited Dec. 27, 2013
Alternatively, have a look at Makefile.darwin for more instructions on building from a console.
Some versions of Xorg and SDL have brightness issues. If you have Xorg >= 7.5 and broken brightness, +
Some versions of Xorg and SDL have brightness issues.
+Try setting "export SDL_VIDEO_X11_NODIRECTCOLOR=1", or if you have Xorg >= 7.5 and broken brightness,
these patched libSDL binaries may help.
OS X has a well known gamma issue where the screen turns dark, but we currently have no fix.