when i boot my computer and it starts up ModemManager it prints a warning message after the login prompt.

the warning says:

ModemManager[18918] <warn> Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:1c.3/0000:24:00.0': not supported by any plugin

followed by the warning:

ModemManager[18918] <warn> Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:1c.5/0000:25:00.0': not supported by any plugin