I haven’t seen anything amiss on my WRT1900ACS’s running main on 6.6. I’m pretty sure the series runs with CONFIG_DEFAULT_kmod-leds-turris-omnia, CONFIG_DEFAULT_kmod-usb-ledtrig-usbport, CONFIG_PACKAGE_kmod-leds-turris-omnia and CONFIG_PACKAGE_kmod-usb-ledtrig-usbport