friedrico (the author of [0]) pointed me to some patches which he used
to get around some issues with qcontrol and systemd as seen in #781886,
these look similar to stuff I was playing with but didn't manage to
finish.
I'm about to go AFK for a few days, but I shall try (again :-/) to make
some time to look into this again when I am back.
Ian.
[0] https://aur.archlinux.org/packages/qcontrol/
diff -ruN a/Makefile b/Makefile
--- a/Makefile 2016-10-30 14:59:12.000000000 +0100
+++ b/Makefile 2017-04-17 20:11:44.719807514 +0200
@@ -5,10 +5,10 @@
LDFLAGS += -g
LIBS += -lpthread
-LIBS_STATIC += /usr/lib/liblua5.1.a -lpthread -lm -ldl
+LIBS_STATIC += /usr/lib/liblua51.a -lpthread -lm -ldl
-CFLAGS += $(shell pkg-config --cflags lua5.1)
-LIBS += $(shell pkg-config --libs lua5.1)
+CFLAGS += $(shell pkg-config --cflags lua51)
+LIBS += $(shell pkg-config --libs lua51)
ifeq ($(shell pkg-config --exists libsystemd-daemon 2>/dev/null && echo 1),1)
CPPFLAGS += -DHAVE_SYSTEMD
diff -ruN a/systemd/qcontrold.service b/systemd/qcontrold.service
--- a/systemd/qcontrold.service 2016-10-30 14:59:12.000000000 +0100
+++ b/systemd/qcontrold.service 2017-04-17 20:14:52.507884975 +0200
@@ -1,7 +1,7 @@
[Unit]
Description=qcontrold
-Requires=dev-input-by\x2dpath-platform\x2dgpio\x2dkeys\x2devent.device
-After=dev-input-by\x2dpath-platform\x2dgpio\x2dkeys\x2devent.device
+Requires=sys-devices-platform-gpio\x2dkeys-input-input0-event0.device
+After=sys-devices-platform-gpio\x2dkeys-input-input0-event0.device
# If the config file is there, we assume qcontrol works on this machine.
ConditionPathExists=/etc/qcontrol.conf
diff -ruN a/systemd/qcontrol.service b/systemd/qcontrol.service
--- a/systemd/qcontrol.service 2016-10-30 14:59:12.000000000 +0100
+++ b/systemd/qcontrol.service 2017-04-17 20:48:22.049529747 +0200
@@ -2,6 +2,7 @@
Description=qcontrol
# If the config file is there, we assume qcontrol works on this machine.
ConditionPathExists=/etc/qcontrol.conf
+Requires=qcontrold.socket
[Service]
Type=oneshot
KERNELS=="input0" SUBSYSTEMS=="input"
ATTRS{phys}=="gpio-keys/input0",TAG+="systemd"
