x11-common: Add PACKAGECONFIG for screen blanking

when "blank" is not in PACKAGECONFIG, explicitly set dpms and
screensaver off. The intention here is to make it easier to
create builds that should not blank the screen (just remove
"blank" from x11-common PACKAGECONFIG).

Also remove a unneeded "find -exec rm" from do_install.

Partly fixes [YOCTO #7278].

(From OE-Core rev: 32ac0bfb0167cb350be5d4b8faca490956dd7d93)

Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-graphics/x11-common/x11-common/Xserver.in

@@ -5,7 +5,7 @@ XSERVER=/usr/bin/Xorg
 
 . /etc/profile
 
-ARGS=" -br -pn"
+ARGS=" -br -pn @BLANK_ARGS@"
 
 DISPLAY=':0'
 

meta/recipes-graphics/x11-common/x11-common_0.1.bb

@@ -9,14 +9,21 @@ inherit distro_features_check
 REQUIRED_DISTRO_FEATURES = "x11"
 
 SRC_URI = "file://etc \
+           file://Xserver.in \
            file://gplv2-license.patch"
 
 S = "${WORKDIR}"
 
+PACKAGECONFIG ??= "blank"
+# dpms and screen saver will be on only if 'blank' is in PACKAGECONFIG
+PACKAGECONFIG[blank] = ""
+
 do_install() {
 	cp -R ${S}/etc ${D}${sysconfdir}
+	sed -e 's/@BLANK_ARGS@/${@bb.utils.contains('PACKAGECONFIG', 'blank', '', '-s 0 -dpms', d)}/' \
+		${S}/Xserver.in > ${D}${sysconfdir}/X11/Xserver
+
 	chmod -R 755 ${D}${sysconfdir}
-	find ${D}${sysconfdir} -type f -name \*~ -exec rm -rf {} \;
 }
 
 RDEPENDS_${PN} = "dbus-x11 xmodmap xdpyinfo xtscal xinit formfactor"