General informations The Linux kernel configuration item CONFIG_SERIAL_8250_PNP has multiple definitions: 8250/16550 PNP device support found in drivers/tty/serial/8250/Kconfig The configuration item CONFIG_SERIAL_8250_PNP: prompt: 8250/16550 PNP device support type: bool depends on: ( CONFIG_EXPERT ) && ( CONFIG_SERIAL_8250 && CONFIG_PNP ) defined in drivers/tty/serial/8250/Kconfig found in Linux