diff --git a/include/sway/commands.h b/include/sway/commands.h
index 0732a90a4..d8b07a912 100644
--- a/include/sway/commands.h
+++ b/include/sway/commands.h
@@ -117,6 +117,7 @@ sway_cmd cmd_input;
 sway_cmd cmd_seat;
 sway_cmd cmd_ipc;
 sway_cmd cmd_kill;
+sway_cmd cmd_lock;
 sway_cmd cmd_layout;
 sway_cmd cmd_log_colors;
 sway_cmd cmd_mark;
@@ -148,6 +149,9 @@ sway_cmd cmd_unmark;
 sway_cmd cmd_workspace;
 sway_cmd cmd_ws_auto_back_and_forth;
 sway_cmd cmd_workspace_layout;
+sway_cmd cmd_idle_timeout;
+sway_cmd cmd_lock_timeout;
+sway_cmd cmd_swaylock_command;
 
 sway_cmd bar_cmd_activate_button;
 sway_cmd bar_cmd_binding_mode_indicator;
diff --git a/include/sway/config.h b/include/sway/config.h
index 87123289a..e4fdf64b8 100644
--- a/include/sway/config.h
+++ b/include/sway/config.h
@@ -305,6 +305,9 @@ struct sway_config {
 	enum sway_container_layout default_layout;
 	char *font;
 	int font_height;
+	uint32_t idle_timeout;
+	uint32_t lock_timeout;
+	char *swaylock_command;
 
 	// Flags
 	bool focus_follows_mouse;
diff --git a/include/sway/idle.h b/include/sway/idle.h
new file mode 100644
index 000000000..e2a22e7e6
--- /dev/null
+++ b/include/sway/idle.h
@@ -0,0 +1,8 @@
+#ifndef _SWAY_IDLE_H
+#define _SWAY_IDLE_H
+#include <sway/server.h>
+
+void idle_setup_seat(struct sway_server *server, struct sway_seat *seat);
+bool idle_init(struct sway_server *server);
+void invoke_swaylock();
+#endif
diff --git a/include/sway/server.h b/include/sway/server.h
index 296fbf224..ac685bf83 100644
--- a/include/sway/server.h
+++ b/include/sway/server.h
@@ -21,6 +21,7 @@ struct sway_server {
 
 	struct wlr_compositor *compositor;
 	struct wlr_data_device_manager *data_device_manager;
+	struct wlr_idle *idle;
 
 	struct sway_input_manager *input;
 
diff --git a/sway/commands.c b/sway/commands.c
index a67bc1277..09ef05867 100644
--- a/sway/commands.c
+++ b/sway/commands.c
@@ -102,12 +102,15 @@ static struct cmd_handler handlers[] = {
 	{ "focus_follows_mouse", cmd_focus_follows_mouse },
 	{ "for_window", cmd_for_window },
 	{ "fullscreen", cmd_fullscreen },
+	{ "idle_timeout", cmd_idle_timeout },
 	{ "include", cmd_include },
 	{ "input", cmd_input },
+	{ "lock_timeout", cmd_lock_timeout },
 	{ "mode", cmd_mode },
 	{ "mouse_warping", cmd_mouse_warping },
 	{ "output", cmd_output },
 	{ "seat", cmd_seat },
+	{ "swaylock_command", cmd_swaylock_command },
 	{ "workspace", cmd_workspace },
 	{ "workspace_auto_back_and_forth", cmd_ws_auto_back_and_forth },
 };
@@ -166,6 +169,7 @@ static struct cmd_handler command_handlers[] = {
 	{ "focus", cmd_focus },
 	{ "kill", cmd_kill },
 	{ "layout", cmd_layout },
+	{ "lock", cmd_lock },
 	{ "move", cmd_move },
 	{ "opacity", cmd_opacity },
 	{ "reload", cmd_reload },
@@ -423,7 +427,7 @@ struct cmd_results *config_command(char *exec, enum cmd_status block) {
 	struct cmd_handler *handler = find_handler(argv[0], block);
 	if (!handler) {
 		char *input = argv[0] ? argv[0] : "(empty)";
-		results = cmd_results_new(CMD_INVALID, input, "Unknown/invalid command");
+		results = cmd_results_new(CMD_INVALID, input, "Unknown/invalid command %d", block);
 		goto cleanup;
 	}
 	int i;
diff --git a/sway/commands/idle_timeout.c b/sway/commands/idle_timeout.c
new file mode 100644
index 000000000..e5ae17c1c
--- /dev/null
+++ b/sway/commands/idle_timeout.c
@@ -0,0 +1,17 @@
+#include <string.h>
+#include <strings.h>
+#include <errno.h>
+#include "sway/commands.h"
+
+struct cmd_results *cmd_idle_timeout(int argc, char **argv) {
+	struct cmd_results *error = NULL;
+	if ((error = checkarg(argc, "idle_timeout", EXPECTED_EQUAL_TO, 1))) {
+		return error;
+	}
+	errno = 0;
+	config->idle_timeout = strtol(argv[0], NULL, 10);
+	if (errno == EINVAL || errno == ERANGE)
+		return cmd_results_new(CMD_INVALID, "idle_timeout", "Invalid timeout '%s'", argv[0]);
+
+	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}
diff --git a/sway/commands/lock.c b/sway/commands/lock.c
new file mode 100644
index 000000000..b4495ad65
--- /dev/null
+++ b/sway/commands/lock.c
@@ -0,0 +1,11 @@
+#include <wlr/util/log.h>
+#include "log.h"
+#include "sway/commands.h"
+#include "sway/idle.h"
+
+struct cmd_results *cmd_lock(int argc, char **argv) {
+
+	invoke_swaylock();
+
+	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}
diff --git a/sway/commands/lock_timeout.c b/sway/commands/lock_timeout.c
new file mode 100644
index 000000000..b85157a22
--- /dev/null
+++ b/sway/commands/lock_timeout.c
@@ -0,0 +1,17 @@
+#include <string.h>
+#include <strings.h>
+#include <errno.h>
+#include "sway/commands.h"
+
+struct cmd_results *cmd_lock_timeout(int argc, char **argv) {
+	struct cmd_results *error = NULL;
+	if ((error = checkarg(argc, "lock_timeout", EXPECTED_EQUAL_TO, 1))) {
+		return error;
+	}
+	errno = 0;
+	config->lock_timeout = strtol(argv[0], NULL, 10);
+	if (errno == EINVAL || errno == ERANGE)
+		return cmd_results_new(CMD_INVALID, "lock_timeout", "Invalid lock timeout.");
+
+	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}
diff --git a/sway/commands/swaylock_command.c b/sway/commands/swaylock_command.c
new file mode 100644
index 000000000..27063cd2e
--- /dev/null
+++ b/sway/commands/swaylock_command.c
@@ -0,0 +1,16 @@
+#include <string.h>
+#include "sway/commands.h"
+#include "log.h"
+#include "stringop.h"
+
+struct cmd_results *cmd_swaylock_command(int argc, char **argv) {
+	struct cmd_results *error = NULL;
+	if ((error = checkarg(argc, "swaylock_command", EXPECTED_AT_LEAST, 1))) {
+		return error;
+	}
+	free(config->swaylock_command);
+	config->swaylock_command = join_args(argv, argc);
+	wlr_log(L_DEBUG, "Using custom swaylock command: %s",
+			config->swaylock_command);
+	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}
diff --git a/sway/config.c b/sway/config.c
index 90b833ab7..952e11ef6 100644
--- a/sway/config.c
+++ b/sway/config.c
@@ -155,6 +155,9 @@ static void config_defaults(struct sway_config *config) {
 	config->floating_mod = 0;
 	config->dragging_key = BTN_LEFT;
 	config->resizing_key = BTN_RIGHT;
+	config->idle_timeout = 600;
+	config->lock_timeout = 300;
+	config->swaylock_command = strdup("swaylock -c 000000");
 	if (!(config->floating_scroll_up_cmd = strdup(""))) goto cleanup;
 	if (!(config->floating_scroll_down_cmd = strdup(""))) goto cleanup;
 	if (!(config->floating_scroll_left_cmd = strdup(""))) goto cleanup;
diff --git a/sway/idle.c b/sway/idle.c
new file mode 100644
index 000000000..d999a8c76
--- /dev/null
+++ b/sway/idle.c
@@ -0,0 +1,159 @@
+#define _POSIX_C_SOURCE 200112L
+#include <sys/types.h>
+#include <unistd.h>
+#include <wlr/types/wlr_idle.h>
+#include <wlr/types/wlr_output.h>
+#include <wlr/util/log.h>
+#include <sway/server.h>
+#include <sway/output.h>
+#include <sway/layers.h>
+#include <sway/config.h>
+#include <wlr/config.h>
+#include <wlr/backend/session.h>
+#include <wlr/backend/multi.h>
+
+
+void invoke_swaylock() {
+	int pid = fork();
+	if (pid == 0) {
+		char *const cmd[] = { "sh", "-c", config->swaylock_command, NULL, };
+		execvp(cmd[0], cmd);
+		exit(1);
+	}
+	wlr_log(L_DEBUG, "Spawned swaylock %d", pid);
+}
+
+bool have_lock(void *data) {
+	if (root_container.children == NULL)
+		return false;
+	if (root_container.children->items == NULL)
+		return false;
+	for (int i = 0; i < root_container.children->length; ++i) {
+		struct sway_container *output_container =
+			root_container.children->items[i];
+		if (output_container == NULL)
+			return false;
+		struct sway_output *output =
+			output_container->sway_output;
+		if (output == NULL)
+			return false;
+		if (output->layers == NULL)
+			return false;
+		struct wl_list *layers = &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY];
+		if (layers == NULL)
+			return false;
+		struct sway_layer_surface *sway_layer;
+		wl_list_for_each_reverse(sway_layer, layers, link) {
+			struct wlr_layer_surface *surface = sway_layer->layer_surface;
+			if (surface != NULL && surface->namespace != NULL) {
+				if (!strcmp("lockscreen", surface->namespace))
+					wlr_log(L_DEBUG, "Lockscreen found!");
+				return true;
+			}
+		}
+	}
+
+	wlr_log(L_DEBUG, "No lockscreen found");
+	return false;
+}
+
+static void prepare_for_sleep(struct wlr_session *session, void *data) {
+	wlr_log(L_DEBUG, "PrepareForSleep signal received");
+	invoke_swaylock();
+}
+
+void setup_sleep_listener(struct sway_server *server) {
+	struct wlr_session *session = NULL;
+	if (wlr_backend_is_multi(server->backend)) {
+		session = wlr_multi_get_session(server->backend);
+	}
+	if (!session) {
+		wlr_log(L_INFO, "No supported session found, skipping sleep litener setup");
+	}
+
+	wlr_session_prepare_for_sleep_listen(session, prepare_for_sleep, have_lock, server);
+}
+
+static int handle_idle(void* data) {
+	wlr_log(L_DEBUG, "Idle state");
+	for (int i = 0; i < root_container.children->length; ++i) {
+		struct sway_container *cont = root_container.children->items[i];
+		if (cont->type != C_OUTPUT) {
+			continue;
+		}
+		if (cont->sway_output && cont->sway_output->wlr_output) {
+			wlr_output_enable(cont->sway_output->wlr_output, false);
+		}
+	}
+	return 0;
+}
+
+static int handle_resume(void *data) {
+	wlr_log(L_DEBUG, "Active state");
+	for (int i = 0; i < root_container.children->length; ++i) {
+		struct sway_container *cont = root_container.children->items[i];
+		if (cont->type != C_OUTPUT) {
+			continue;
+		}
+		if (cont->sway_output && cont->sway_output->wlr_output) {
+			wlr_output_enable(cont->sway_output->wlr_output, true);
+		}
+	}
+	return 0;
+}
+
+static const struct wlr_idle_timeout_listener idle_listener = {
+	.idle = handle_idle,
+	.resumed = handle_resume,
+};
+
+static int handle_lock(void* data) {
+	wlr_log(L_DEBUG, "Lock screen");
+	invoke_swaylock();
+	return 0;
+}
+
+static int handle_nop(void *data) {
+	//NOP
+	return 0;
+}
+
+
+static const struct wlr_idle_timeout_listener lock_listener = {
+	.idle = handle_lock,
+	.resumed = handle_nop,
+};
+
+void idle_setup_seat(struct sway_server *server, struct sway_seat *seat) {
+	if (server->idle == NULL) {
+		return;
+	}
+	if (config != NULL) {
+		if (config->idle_timeout > 0) {
+			wlr_log(L_DEBUG, "Setup idle timer %d", config->idle_timeout);
+			wlr_idle_listen(server->idle, config->idle_timeout * 1000, &idle_listener, seat->wlr_seat);
+		} else {
+			wlr_log(L_INFO, "Idle timeout set to 0, will disable screen power management");
+		}
+		if (config->lock_timeout > 0) {
+			wlr_log(L_DEBUG, "Setup lock timer %d", config->lock_timeout);
+			wlr_idle_listen(server->idle, config->lock_timeout * 1000, &lock_listener, seat->wlr_seat);
+			setup_sleep_listener(server);
+		} else {
+			wlr_log(L_INFO, "Lock timeout set to 0, will disable auto lock");
+		}
+	} else {
+		wlr_log(L_ERROR, "Cant setup idle timers for seat since no config is available!");
+	}
+}
+
+bool idle_init(struct sway_server *server) {
+	wlr_log(L_DEBUG, "Initializing idle");
+	server->idle = wlr_idle_create(server->wl_display);
+	struct sway_seat *seat = NULL;
+	wl_list_for_each(seat, &input_manager->seats, link) {
+		idle_setup_seat(server, seat);
+	}
+	return true;
+}
+
diff --git a/sway/input/cursor.c b/sway/input/cursor.c
index 944ad8eb9..ce0a7415f 100644
--- a/sway/input/cursor.c
+++ b/sway/input/cursor.c
@@ -6,6 +6,7 @@
 #endif
 #include <wlr/types/wlr_cursor.h>
 #include <wlr/types/wlr_xcursor_manager.h>
+#include <wlr/types/wlr_idle.h>
 #include "list.h"
 #include "log.h"
 #include "sway/input/cursor.h"
@@ -171,6 +172,7 @@ void cursor_send_pointer_motion(struct sway_cursor *cursor, uint32_t time_msec)
 
 static void handle_cursor_motion(struct wl_listener *listener, void *data) {
 	struct sway_cursor *cursor = wl_container_of(listener, cursor, motion);
+	wlr_idle_notify_activity(cursor->seat->input->server->idle, cursor->seat->wlr_seat);
 	struct wlr_event_pointer_motion *event = data;
 	wlr_cursor_move(cursor->cursor, event->device,
 		event->delta_x, event->delta_y);
@@ -181,6 +183,7 @@ static void handle_cursor_motion_absolute(
 		struct wl_listener *listener, void *data) {
 	struct sway_cursor *cursor =
 		wl_container_of(listener, cursor, motion_absolute);
+	wlr_idle_notify_activity(cursor->seat->input->server->idle, cursor->seat->wlr_seat);
 	struct wlr_event_pointer_motion_absolute *event = data;
 	wlr_cursor_warp_absolute(cursor->cursor, event->device, event->x, event->y);
 	cursor_send_pointer_motion(cursor, event->time_msec);
@@ -230,6 +233,7 @@ void dispatch_cursor_button(struct sway_cursor *cursor,
 
 static void handle_cursor_button(struct wl_listener *listener, void *data) {
 	struct sway_cursor *cursor = wl_container_of(listener, cursor, button);
+	wlr_idle_notify_activity(cursor->seat->input->server->idle, cursor->seat->wlr_seat);
 	struct wlr_event_pointer_button *event = data;
 	dispatch_cursor_button(cursor,
 			event->time_msec, event->button, event->state);
@@ -237,6 +241,7 @@ static void handle_cursor_button(struct wl_listener *listener, void *data) {
 
 static void handle_cursor_axis(struct wl_listener *listener, void *data) {
 	struct sway_cursor *cursor = wl_container_of(listener, cursor, axis);
+	wlr_idle_notify_activity(cursor->seat->input->server->idle, cursor->seat->wlr_seat);
 	struct wlr_event_pointer_axis *event = data;
 	wlr_seat_pointer_notify_axis(cursor->seat->wlr_seat, event->time_msec,
 		event->orientation, event->delta);
@@ -244,12 +249,14 @@ static void handle_cursor_axis(struct wl_listener *listener, void *data) {
 
 static void handle_touch_down(struct wl_listener *listener, void *data) {
 	struct sway_cursor *cursor = wl_container_of(listener, cursor, touch_down);
+	wlr_idle_notify_activity(cursor->seat->input->server->idle, cursor->seat->wlr_seat);
 	struct wlr_event_touch_down *event = data;
 	wlr_log(L_DEBUG, "TODO: handle touch down event: %p", event);
 }
 
 static void handle_touch_up(struct wl_listener *listener, void *data) {
 	struct sway_cursor *cursor = wl_container_of(listener, cursor, touch_up);
+	wlr_idle_notify_activity(cursor->seat->input->server->idle, cursor->seat->wlr_seat);
 	struct wlr_event_touch_up *event = data;
 	wlr_log(L_DEBUG, "TODO: handle touch up event: %p", event);
 }
@@ -257,6 +264,7 @@ static void handle_touch_up(struct wl_listener *listener, void *data) {
 static void handle_touch_motion(struct wl_listener *listener, void *data) {
 	struct sway_cursor *cursor =
 		wl_container_of(listener, cursor, touch_motion);
+	wlr_idle_notify_activity(cursor->seat->input->server->idle, cursor->seat->wlr_seat);
 	struct wlr_event_touch_motion *event = data;
 	wlr_log(L_DEBUG, "TODO: handle touch motion event: %p", event);
 }
@@ -297,6 +305,7 @@ static void apply_mapping_from_region(struct wlr_input_device *device,
 
 static void handle_tool_axis(struct wl_listener *listener, void *data) {
 	struct sway_cursor *cursor = wl_container_of(listener, cursor, tool_axis);
+	wlr_idle_notify_activity(cursor->seat->input->server->idle, cursor->seat->wlr_seat);
 	struct wlr_event_tablet_tool_axis *event = data;
 	struct sway_input_device *input_device = event->device->data;
 
@@ -319,6 +328,7 @@ static void handle_tool_axis(struct wl_listener *listener, void *data) {
 
 static void handle_tool_tip(struct wl_listener *listener, void *data) {
 	struct sway_cursor *cursor = wl_container_of(listener, cursor, tool_tip);
+	wlr_idle_notify_activity(cursor->seat->input->server->idle, cursor->seat->wlr_seat);
 	struct wlr_event_tablet_tool_tip *event = data;
 	dispatch_cursor_button(cursor, event->time_msec,
 			BTN_LEFT, event->state == WLR_TABLET_TOOL_TIP_DOWN ?
@@ -327,6 +337,7 @@ static void handle_tool_tip(struct wl_listener *listener, void *data) {
 
 static void handle_tool_button(struct wl_listener *listener, void *data) {
 	struct sway_cursor *cursor = wl_container_of(listener, cursor, tool_button);
+	wlr_idle_notify_activity(cursor->seat->input->server->idle, cursor->seat->wlr_seat);
 	struct wlr_event_tablet_tool_button *event = data;
 	// TODO: the user may want to configure which tool buttons are mapped to
 	// which simulated pointer buttons
diff --git a/sway/input/keyboard.c b/sway/input/keyboard.c
index dbf2ce013..c07557db8 100644
--- a/sway/input/keyboard.c
+++ b/sway/input/keyboard.c
@@ -2,6 +2,7 @@
 #include <limits.h>
 #include <wlr/backend/multi.h>
 #include <wlr/backend/session.h>
+#include <wlr/types/wlr_idle.h>
 #include "sway/input/seat.h"
 #include "sway/input/keyboard.h"
 #include "sway/input/input-manager.h"
@@ -330,6 +331,7 @@ static void handle_keyboard_key(struct wl_listener *listener, void *data) {
 	struct wlr_seat *wlr_seat = keyboard->seat_device->sway_seat->wlr_seat;
 	struct wlr_input_device *wlr_device =
 		keyboard->seat_device->input_device->wlr_device;
+	wlr_idle_notify_activity(keyboard->seat_device->sway_seat->input->server->idle, wlr_seat);
 	struct wlr_event_keyboard_key *event = data;
 
 	xkb_keycode_t keycode = event->keycode + 8;
diff --git a/sway/input/seat.c b/sway/input/seat.c
index 963d38b2f..271a529ea 100644
--- a/sway/input/seat.c
+++ b/sway/input/seat.c
@@ -19,6 +19,7 @@
 #include "sway/tree/container.h"
 #include "sway/tree/view.h"
 #include "sway/tree/workspace.h"
+#include "sway/idle.h"
 #include "log.h"
 
 static void seat_device_destroy(struct sway_seat_device *seat_device) {
@@ -257,6 +258,8 @@ struct sway_seat *seat_create(struct sway_input_manager *input,
 
 	wl_list_insert(&input->seats, &seat->link);
 
+	idle_setup_seat(input->server, seat);
+
 	return seat;
 }
 
diff --git a/sway/main.c b/sway/main.c
index efb674b6b..d258faae1 100644
--- a/sway/main.c
+++ b/sway/main.c
@@ -18,6 +18,7 @@
 #include <wlr/util/log.h>
 #include "sway/config.h"
 #include "sway/debug.h"
+#include "sway/idle.h"
 #include "sway/server.h"
 #include "sway/tree/layout.h"
 #include "sway/ipc-server.h"
@@ -413,6 +414,7 @@ int main(int argc, char **argv) {
 	// TODO: wait for server to be ready
 	// TODO: consume config->cmd_queue
 	config->active = true;
+	idle_init(&server);
 
 	if (!terminate_request) {
 		server_run(&server);
diff --git a/sway/meson.build b/sway/meson.build
index c9bb8f83d..cec4dfd0a 100644
--- a/sway/meson.build
+++ b/sway/meson.build
@@ -1,6 +1,7 @@
 sway_sources = files(
 	'main.c',
 	'server.c',
+	'idle.c',
 	'commands.c',
 	'config.c',
 	'criteria.c',
@@ -38,6 +39,7 @@ sway_sources = files(
 	'commands/for_window.c',
 	'commands/fullscreen.c',
 	'commands/kill.c',
+	'commands/lock.c',
 	'commands/opacity.c',
 	'commands/include.c',
 	'commands/input.c',
@@ -58,6 +60,9 @@ sway_sources = files(
 	'commands/swaybg_command.c',
 	'commands/workspace.c',
 	'commands/ws_auto_back_and_forth.c',
+	'commands/idle_timeout.c',
+	'commands/lock_timeout.c',
+	'commands/swaylock_command.c',
 
 	'commands/bar/activate_button.c',
 	'commands/bar/binding_mode_indicator.c',