diff --git a/src/uterm_drm_shared.c b/src/uterm_drm_shared.c
index bef6ff8..2c9c126 100644
--- a/src/uterm_drm_shared.c
+++ b/src/uterm_drm_shared.c
@@ -93,3 +93,101 @@ const struct mode_ops uterm_drm_mode_ops = {
 	.get_width = uterm_drm_mode_get_width,
 	.get_height = uterm_drm_mode_get_height,
 };
+
+int uterm_drm_set_dpms(int fd, uint32_t conn_id, int state)
+{
+	int i, ret, set;
+	drmModeConnector *conn;
+	drmModePropertyRes *prop;
+
+	switch (state) {
+	case UTERM_DPMS_ON:
+		set = DRM_MODE_DPMS_ON;
+		break;
+	case UTERM_DPMS_STANDBY:
+		set = DRM_MODE_DPMS_STANDBY;
+		break;
+	case UTERM_DPMS_SUSPEND:
+		set = DRM_MODE_DPMS_SUSPEND;
+		break;
+	case UTERM_DPMS_OFF:
+		set = DRM_MODE_DPMS_OFF;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	conn = drmModeGetConnector(fd, conn_id);
+	if (!conn) {
+		log_err("cannot get display connector");
+		return -EFAULT;
+	}
+
+	ret = state;
+	for (i = 0; i < conn->count_props; ++i) {
+		prop = drmModeGetProperty(fd, conn->props[i]);
+		if (!prop) {
+			log_error("cannot get DRM property (%d): %m", errno);
+			continue;
+		}
+
+		if (!strcmp(prop->name, "DPMS")) {
+			ret = drmModeConnectorSetProperty(fd, conn_id,
+							  prop->prop_id, set);
+			if (ret) {
+				log_info("cannot set DPMS");
+				ret = -EFAULT;
+			}
+			drmModeFreeProperty(prop);
+			break;
+		}
+		drmModeFreeProperty(prop);
+	}
+
+	if (i == conn->count_props) {
+		log_warn("display does not support DPMS");
+		ret = UTERM_DPMS_UNKNOWN;
+	}
+
+	drmModeFreeConnector(conn);
+	return ret;
+}
+
+int uterm_drm_get_dpms(int fd, drmModeConnector *conn)
+{
+	int i, ret;
+	drmModePropertyRes *prop;
+
+	for (i = 0; i < conn->count_props; ++i) {
+		prop = drmModeGetProperty(fd, conn->props[i]);
+		if (!prop) {
+			log_error("cannot get DRM property (%d): %m", errno);
+			continue;
+		}
+
+		if (!strcmp(prop->name, "DPMS")) {
+			switch (conn->prop_values[i]) {
+			case DRM_MODE_DPMS_ON:
+				ret = UTERM_DPMS_ON;
+				break;
+			case DRM_MODE_DPMS_STANDBY:
+				ret = UTERM_DPMS_STANDBY;
+				break;
+			case DRM_MODE_DPMS_SUSPEND:
+				ret = UTERM_DPMS_SUSPEND;
+				break;
+			case DRM_MODE_DPMS_OFF:
+			default:
+				ret = UTERM_DPMS_OFF;
+			}
+
+			drmModeFreeProperty(prop);
+			return ret;
+		}
+		drmModeFreeProperty(prop);
+	}
+
+	if (i == conn->count_props)
+		log_warn("display does not support DPMS");
+	return UTERM_DPMS_UNKNOWN;
+}
diff --git a/src/uterm_drm_shared_internal.h b/src/uterm_drm_shared_internal.h
index 5e918d9..53d00ae 100644
--- a/src/uterm_drm_shared_internal.h
+++ b/src/uterm_drm_shared_internal.h
@@ -34,6 +34,8 @@
 #include "uterm_video.h"
 #include "uterm_video_internal.h"
 
+/* drm mode */
+
 struct uterm_drm_mode {
 	drmModeModeInfo info;
 };
@@ -54,4 +56,9 @@ static inline drmModeModeInfo *uterm_drm_mode_get_info(struct uterm_mode *m)
 
 extern const struct mode_ops uterm_drm_mode_ops;
 
+/* drm dpms */
+
+int uterm_drm_set_dpms(int fd, uint32_t conn_id, int state);
+int uterm_drm_get_dpms(int fd, drmModeConnector *conn);
+
 #endif /* UTERM_DRM_SHARED_INTERNAL_H */
diff --git a/src/uterm_video_drm.c b/src/uterm_video_drm.c
index 9630081..1cfec3b 100644
--- a/src/uterm_video_drm.c
+++ b/src/uterm_video_drm.c
@@ -306,69 +306,21 @@ static void display_deactivate(struct uterm_display *disp)
 
 static int display_set_dpms(struct uterm_display *disp, int state)
 {
-	int i, ret, set;
-	drmModeConnector *conn;
-	drmModePropertyRes *prop;
+	int ret;
 
 	if (!display_is_conn(disp) || !video_is_awake(disp->video))
 		return -EINVAL;
 
-	switch (state) {
-	case UTERM_DPMS_ON:
-		set = DRM_MODE_DPMS_ON;
-		break;
-	case UTERM_DPMS_STANDBY:
-		set = DRM_MODE_DPMS_STANDBY;
-		break;
-	case UTERM_DPMS_SUSPEND:
-		set = DRM_MODE_DPMS_SUSPEND;
-		break;
-	case UTERM_DPMS_OFF:
-		set = DRM_MODE_DPMS_OFF;
-		break;
-	default:
-		return -EINVAL;
-	}
-
 	log_info("setting DPMS of display %p to %s", disp,
-			uterm_dpms_to_name(state));
+		 uterm_dpms_to_name(state));
 
-	conn = drmModeGetConnector(disp->video->drm.fd, disp->drm.conn_id);
-	if (!conn) {
-		log_err("cannot get display connector");
-		return -EFAULT;
-	}
+	ret = uterm_drm_set_dpms(disp->video->drm.fd, disp->drm.conn_id,
+				 state);
+	if (ret < 0)
+		return ret;
 
-	ret = 0;
-	for (i = 0; i < conn->count_props; ++i) {
-		prop = drmModeGetProperty(disp->video->drm.fd, conn->props[i]);
-		if (!prop) {
-			log_error("cannot get DRM property (%d): %m", errno);
-			continue;
-		}
-
-		if (!strcmp(prop->name, "DPMS")) {
-			ret = drmModeConnectorSetProperty(disp->video->drm.fd,
-				disp->drm.conn_id, prop->prop_id, set);
-			if (ret) {
-				log_info("cannot set DPMS");
-				ret = -EFAULT;
-			}
-			drmModeFreeProperty(prop);
-			break;
-		}
-		drmModeFreeProperty(prop);
-	}
-
-	if (i == conn->count_props) {
-		ret = 0;
-		log_warn("display does not support DPMS");
-		state = UTERM_DPMS_UNKNOWN;
-	}
-
-	drmModeFreeConnector(conn);
-	disp->dpms = state;
-	return ret;
+	disp->dpms = ret;
+	return 0;
 }
 
 static int display_use(struct uterm_display *disp)
@@ -984,45 +936,6 @@ static void show_displays(struct uterm_video *video)
 	}
 }
 
-static int get_dpms(struct uterm_display *disp, drmModeConnector *conn)
-{
-	int i, ret;
-	drmModePropertyRes *prop;
-
-	for (i = 0; i < conn->count_props; ++i) {
-		prop = drmModeGetProperty(disp->video->drm.fd, conn->props[i]);
-		if (!prop) {
-			log_error("cannot get DRM property (%d): %m", errno);
-			continue;
-		}
-
-		if (!strcmp(prop->name, "DPMS")) {
-			switch (conn->prop_values[i]) {
-			case DRM_MODE_DPMS_ON:
-				ret = UTERM_DPMS_ON;
-				break;
-			case DRM_MODE_DPMS_STANDBY:
-				ret = UTERM_DPMS_STANDBY;
-				break;
-			case DRM_MODE_DPMS_SUSPEND:
-				ret = UTERM_DPMS_SUSPEND;
-				break;
-			case DRM_MODE_DPMS_OFF:
-			default:
-				ret = UTERM_DPMS_OFF;
-			}
-
-			drmModeFreeProperty(prop);
-			return ret;
-		}
-		drmModeFreeProperty(prop);
-	}
-
-	if (i == conn->count_props)
-		log_warn("display does not support DPMS");
-	return UTERM_DPMS_UNKNOWN;
-}
-
 static void bind_display(struct uterm_video *video, drmModeRes *res,
 							drmModeConnector *conn)
 {
@@ -1057,7 +970,7 @@ static void bind_display(struct uterm_video *video, drmModeRes *res,
 	disp->flags |= DISPLAY_AVAILABLE;
 	disp->next = video->displays;
 	video->displays = disp;
-	disp->dpms = get_dpms(disp, conn);
+	disp->dpms = uterm_drm_get_dpms(disp->video->drm.fd, conn);
 	log_info("display %p DPMS is %s", disp,
 			uterm_dpms_to_name(disp->dpms));
 	VIDEO_CB(video, disp, UTERM_NEW);
diff --git a/src/uterm_video_dumb.c b/src/uterm_video_dumb.c
index 3fba9ab..4333e85 100644
--- a/src/uterm_video_dumb.c
+++ b/src/uterm_video_dumb.c
@@ -265,69 +265,21 @@ static void display_deactivate(struct uterm_display *disp)
 
 static int display_set_dpms(struct uterm_display *disp, int state)
 {
-	int i, ret, set;
-	drmModeConnector *conn;
-	drmModePropertyRes *prop;
+	int ret;
 
 	if (!display_is_conn(disp) || !video_is_awake(disp->video))
 		return -EINVAL;
 
-	switch (state) {
-	case UTERM_DPMS_ON:
-		set = DRM_MODE_DPMS_ON;
-		break;
-	case UTERM_DPMS_STANDBY:
-		set = DRM_MODE_DPMS_STANDBY;
-		break;
-	case UTERM_DPMS_SUSPEND:
-		set = DRM_MODE_DPMS_SUSPEND;
-		break;
-	case UTERM_DPMS_OFF:
-		set = DRM_MODE_DPMS_OFF;
-		break;
-	default:
-		return -EINVAL;
-	}
-
 	log_info("setting DPMS of display %p to %s", disp,
-			uterm_dpms_to_name(state));
+		 uterm_dpms_to_name(state));
 
-	conn = drmModeGetConnector(disp->video->dumb.fd, disp->dumb.conn_id);
-	if (!conn) {
-		log_err("cannot get display connector");
-		return -EFAULT;
-	}
+	ret = uterm_drm_set_dpms(disp->video->dumb.fd, disp->dumb.conn_id,
+				 state);
+	if (ret < 0)
+		return ret;
 
-	ret = 0;
-	for (i = 0; i < conn->count_props; ++i) {
-		prop = drmModeGetProperty(disp->video->dumb.fd, conn->props[i]);
-		if (!prop) {
-			log_error("cannot get DRM property (%d): %m", errno);
-			continue;
-		}
-
-		if (!strcmp(prop->name, "DPMS")) {
-			ret = drmModeConnectorSetProperty(disp->video->dumb.fd,
-				disp->dumb.conn_id, prop->prop_id, set);
-			if (ret) {
-				log_info("cannot set DPMS");
-				ret = -EFAULT;
-			}
-			drmModeFreeProperty(prop);
-			break;
-		}
-		drmModeFreeProperty(prop);
-	}
-
-	if (i == conn->count_props) {
-		ret = 0;
-		log_warn("display does not support DPMS");
-		state = UTERM_DPMS_UNKNOWN;
-	}
-
-	drmModeFreeConnector(conn);
-	disp->dpms = state;
-	return ret;
+	disp->dpms = ret;
+	return 0;
 }
 
 static int display_swap(struct uterm_display *disp)
@@ -568,45 +520,6 @@ static void show_displays(struct uterm_video *video)
 	}
 }
 
-static int get_dpms(struct uterm_display *disp, drmModeConnector *conn)
-{
-	int i, ret;
-	drmModePropertyRes *prop;
-
-	for (i = 0; i < conn->count_props; ++i) {
-		prop = drmModeGetProperty(disp->video->dumb.fd, conn->props[i]);
-		if (!prop) {
-			log_error("cannot get DRM property (%d): %m", errno);
-			continue;
-		}
-
-		if (!strcmp(prop->name, "DPMS")) {
-			switch (conn->prop_values[i]) {
-			case DRM_MODE_DPMS_ON:
-				ret = UTERM_DPMS_ON;
-				break;
-			case DRM_MODE_DPMS_STANDBY:
-				ret = UTERM_DPMS_STANDBY;
-				break;
-			case DRM_MODE_DPMS_SUSPEND:
-				ret = UTERM_DPMS_SUSPEND;
-				break;
-			case DRM_MODE_DPMS_OFF:
-			default:
-				ret = UTERM_DPMS_OFF;
-			}
-
-			drmModeFreeProperty(prop);
-			return ret;
-		}
-		drmModeFreeProperty(prop);
-	}
-
-	if (i == conn->count_props)
-		log_warn("display does not support DPMS");
-	return UTERM_DPMS_UNKNOWN;
-}
-
 static void bind_display(struct uterm_video *video, drmModeRes *res,
 							drmModeConnector *conn)
 {
@@ -641,7 +554,7 @@ static void bind_display(struct uterm_video *video, drmModeRes *res,
 	disp->flags |= DISPLAY_AVAILABLE;
 	disp->next = video->displays;
 	video->displays = disp;
-	disp->dpms = get_dpms(disp, conn);
+	disp->dpms = uterm_drm_get_dpms(disp->video->dumb.fd, conn);
 	log_info("display %p DPMS is %s", disp,
 			uterm_dpms_to_name(disp->dpms));
 	VIDEO_CB(video, disp, UTERM_NEW);