MIDI with C-Media 8738?

From: Björn Persson (bjorn_persson_at_sverige.nu)
Date: 01/31/04

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    To: fedora-list@redhat.com
Date: Sat, 31 Jan 2004 20:36:00 +0100

    I can't find a way to play MIDI music through the built-in "sound card" on
    my motherboard. Playmidi tries to use /dev/sequencer (and so does Kmid on
    the rare occasions when it doesn't segfault). /dev/sequencer exists as a
    device file (device 14, 1), but trying to open it produces the message "No
    such device".

    I found the following in /etc/sysconfig/hwconf:

    class: AUDIO
    bus: PCI
    detached: 0
    driver: cmpci
    desc: "C-Media Electronics Inc|CM8738"
    vendorId: 13f6
    deviceId: 0111
    subVendorId: 13f6
    subDeviceId: 0111
    pciType: 1
    pcibus: 2
    pcidev: 9
    pcifn: 0

    I currently have Linux 2.4.22-1.2149.nptl, and the cmpci module is loaded.
    Assuming that the kernel is configured as specified in
    /usr/src/linux-2.4.22-1.2149.nptl/configs/kernel-2.4.22-i686.config, the
    cmpci module should have MIDI support. There is a line
    "CONFIG_SOUND_CMPCI_MIDI=y".

    If I load the v_midi module /dev/sequencer can be opened, but then Playmidi
    says "No playback device found.". Maybe v_midi is for some other hardware?

    /dev/midi00 seems to exist (device 14, 2). Should I link /dev/sequencer to
    /dev/midi00?

    In that other OS I can play MIDI files just fine, so I know the hardware is
    OK.

    Thanks in advance for any help.
    Björn Persson 

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