Re: [linux-audio-user] Midi Woes

Hi Clemens,

try those 3 commands as root from a sheel:

"rmmod snd-mpu401 snd-mpu401_uart"

"modprobe mpu_port pnp=1"

Make sure no appliction is using the midi port before entering the
above commands.

then type this command:

"cat /proc/interrupts /proc/ioports |grep MPU"

The last command should output dma and IRQ addresses of your mpu interface.

That's what it outputs in my case:

cat /proc/interrupts /proc/ioports | grep MPU
  5: 14 IO-APIC-edge MPU401 UART
0330-0331 : MPU401 UART

The MPU is sitting at dma is 5 on IRQ 0x330. And those are the very
same values I have the MPU401 setup in my bios.

Not that it matters, it should work already, as in:

$~/ pmidi -l
 Port Client name Port name
 14:0 Midi Through Midi Through Port-0
 20:0 MPU-401 UART MPU-401 UART MIDI

The problem in my case is it doesn't work...
Onboard MPU401 has never worked too well for me in the latest kernels,
tested on a an asus nforce2 based MB and on an ASRock "el-cheapo"
SIS7012 based MB, both of them using the intel8x0 sound module.

It doesn't work in that if I try playing a midi file the kernel
complains on syslog about weird erros.
That kinda worked with the older alsa versions that still had the
"mpu_port" parameter for the onboard sound module.
The midi port worked for some random amount of time untill it
completely locked my box. I tested this under various distros.
I am thinking about buying an extrenal/USB midi box, I am stuck
without midi right now.

Hopefully you'll be luckier than I was.

Cheers,

-gzed

2006/11/10, Chip VanDan <chip.vandan@email-addr-hidden>:
> Well there was nothing about gameports or MIDI ports in the BIOS
> except that they were "enabled" so I'm not sure how else to find the
> physical address of the port. Perhaps I just need to put more
> research time into finding a module to enable it in the OS, but if
> it's not a serial port then what is it?
>
> > The serial ports have nothing to do with MIDI.
> > The MIDI port should be listed under "gameport" or "MIDI" or "MPU-401".
>
>
>
> --
> -----BEGIN GEEK CODE BLOCK-----
> Version: 3.12
> GCA/FA/S/O d+(--) s+: a-- C+++ L++ P E-- W++ N-
> o K? w O-- M- V- PS+ PE- Y+ PGP t- 5-- X R- !tv
> b++ DI++ D+ G+ e+/++ h--- r--/+++ z+++(*)
> ------END GEEK CODE BLOCK------
>
Received on Mon Nov 13 04:15:14 2006