I have this setting enabled and am still having the same issue. Seems to be a ACPI bug in the kernel version that unraid is currently using. The kernel creates the ACPI device node /sys/bus/acpi/devices/LNXPWRBN:00, but never registers the corresponding /sys/bus/platform/devices/LNXPWRBN:00 platform device. fixed in https://github.com/torvalds/linux/commit/ab06eb920401 At least that is the conclusion I came to after a night of trying to diagnose it.