Re: [ALSA - driver 0002219]: snd-mpu401 don't load

Lee Revell
2006-06-20T23:54:36Z

On Wed, 2006-06-21 at 01:46 +0200, Rene Herman wrote:
> Lee Revell wrote:
>
> >>> ----------------------------------------------------------------------
> >>> rlrevell - 06-21-06 00:18
> >>> ----------------------------------------------------------------------
> >>> It must be a kernel bug if the port does not appear in /proc/ioports.
>
> >> Lee, please note that legacy (ISA/LPC, even PnP/ACPI controlled) hw does
> >> not ever appear in /proc/ioports without the driver loaded and having
> >> done a request_region().
> >>
> >> By the way, the missing IRQ is not necesarily a problem. An MPU401 can
> >> output MIDI fine without using an IRQ and if his BIOS does not let him
> >> assign an IRQ (and Windows does not use one) I guess no IRQ is available
> >> for it.
> >
> > So where's the bug?
>
> Dunno -- but the snd-mpu401 thing is irrelevant; he said snd-mpu401-uart
> _was_ being loaded, and it should then just take care of the port. As to
> why it's not doing so...
>
> Maybe it's under an unknown PnP ID and not being enabled or something
> like that. Dunno again.

OK, I don't know anything about ancient, pre-PCI hardware, so I guess I
can't help.

Lee