+ m->udev_device_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
+ if (!m->udev_device_monitor)
+ return -ENOMEM;
+
+ r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "input", NULL);
+ if (r < 0)
+ return r;
+
+ r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "graphics", NULL);
+ if (r < 0)
+ return r;
+
+ r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "drm", NULL);
+ if (r < 0)
+ return r;
+
+ r = udev_monitor_enable_receiving(m->udev_device_monitor);
+ if (r < 0)
+ return r;
+
+ m->udev_device_fd = udev_monitor_get_fd(m->udev_device_monitor);
+ zero(ev);
+ ev.events = EPOLLIN;
+ ev.data.u32 = FD_DEVICE_UDEV;
+ if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_device_fd, &ev) < 0)
+ return -errno;
+