Multiple sound cards in Wheezy occasionally misses ALSA motherboard card0

[conover@rahul.net (John Conover)]

I Added to EOF of /etc/modprobe.d/alsa-base.conf:

    options snd_bt87x index=-2
    options snd-hda-intel index=0
    options snd-usb-audio index=1 vid=0x046d pid=0x081b
    options snd_bt87x index=2
    options snd-usb-audio index=3 vid=0x0d8c pid=0x0008

to accomodate 4 sound cards, (card1 is a USB microphone, and is not
connected.)

Occasionally, after a boot, "cat /proc/asound/cards", yields:

    0 [U0x46d0x81b    ]: USB-Audio - USB Device 0x46d:0x81b
                         USB Device 0x46d:0x81b at usb-0000:00:1a.7-1.4, high speed
    2 [Bt878          ]: Bt87x - Brooktree Bt878
                         Brooktree Bt878 at 0xf0000000, irq 16

    Note that the HDA-Intel was NOT card0.                    

Usually, after a boot, "cat /proc/asound/cards", yields:

    0 [Intel          ]: HDA-Intel - HDA Intel
                         HDA Intel at 0xf7adc000 irq 50
    2 [Bt878          ]: Bt87x - Brooktree Bt878
                         Brooktree Bt878 at 0xf0000000, irq 16
    3 [Device         ]: USB-Audio - C-Media USB Audio Device
                         C-Media USB Audio Device at usb-0000:00:1d.2-1, full speed

    Which is correct as per /etc/udev/rules.d/25-alsa.rules and
    /etc/modprobe.d/alsa-base.conf assignments.

Any ideas why card0 is occasionally erratic?

(Maybe 25-alsa.rules should be named to a lower number? Maybe "options
snd-hda-intel index=0" in /etc/modprobe.d/alsa-base.conf should be
omitted?)

    Thanks for any help,

    John

-- 

John Conover, conover@rahul.net, http://www.johncon.com/