[LAU] How to find out correct parameters for snd-mpu401?

Clemens Ladisch cladisch at fastmail.net
Tue May 5 03:38:48 EDT 2009


CC-Band wrote:
> i am not able to load the snd-mpu401-module ...
> 
> i tried a few parameters (p.e. "modprobe snd-mpu401 port=0xb000 irq=11") but 
> always get the message:
> 
> FATAL: Error inserting snd_mpu401 (/lib/modules/2.6.25.8/kernel/sound/drivers/mpu401/snd-mpu401.ko): No such device

MPU-401 ports are ISA devices; they are not listed in the PCI Plug&Play
information, and you cannot use a port address from there.

If your mainboard is recent enough, the MPU-401 is listed in the ACPI
Plug&Play information, and the snd-mpu401 module will automatically load
without any parameters.

If there is no ACPI information about the MPU-401, you have to manually
set the parameters, _and_ disable P&P ("pnp=0").  The port address and
interrupt can be set in the BIOS setup, and that is the only place where
you can look to determine their values.


HTH
Clemens



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