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Re: /dev/audio - touch it to initialize?

No clue on the HW.  Looks like snapper.  Here's the dmesg:

NetBSD 5.0.2 (GENERIC) #0: Sat Feb  6 18:57:33 UTC 2010
total memory = 1024 MB
avail memory = 985 MB
timecounter: Timecounters tick every 10.000 msec
found openpic PIC at 80040000
OpenPIC Version 1.2: Supports 4 CPUs and 64 interrupt sources.
bootpath: /pci@f2000000/mac-io@17/ata-4@1f000/disk@0:11,/netbsd
mainbus0 (root)
cpu0 at mainbus0: 7455 (Revision 2.1), ID 0 (primary)
powersave: 1
cpu0: 866.67 MHz, 256KB L2 cache no parity parity enabled
memory0 at mainbus0: len=384
spdmem0 at memory0
spdmem0: SDRAM memory, no parity or ECC, 512MB, 143MHz (PC-1100)
spdmem0: 13 rows, 10 cols, 2 banks, 4 banks/chip, 7.0ns cycle time
spdmem0: tAA-tRCD-tRP-tRAS: 3-15-15-37
spdmem0: voltage LvTTL (not 5V tolerant), refresh time 7.8us (self-refreshing)
spdmem1 at memory0
spdmem1: SDRAM memory, no parity or ECC, 512MB, 143MHz (PC-1100)
spdmem1: 13 rows, 10 cols, 2 banks, 4 banks/chip, 7.0ns cycle time
spdmem1: tAA-tRCD-tRP-tRAS: 3-15-15-37
spdmem1: voltage LvTTL (not 5V tolerant), refresh time 7.8us (self-refreshing)
uni_n0 at mainbus0 address 0xf8000000
ki2c0 at uni_n0 address 0xf8001000
iic1 at ki2c0: I2C bus
uninorth0 at mainbus0
pci0 at uninorth0 bus 0
pci0: i/o space, memory space enabled
pchb0 at pci0 dev 11 function 0
pchb0: Apple Computer UniNorth AGP Interface (rev. 0x00)
genfb0 at pci0 dev 16 function 0: NVIDIA GeForce4 MX 420
genfb0: framebuffer at 0x98004000, size 832x624, depth 8, stride 1024
wsdisplay0 at genfb0 kbdmux 1: console (default, vt100 emulation)
wsmux1: connecting to wsdisplay0
drm at genfb0 not configured
uninorth1 at mainbus0
pci1 at uninorth1 bus 0
pci1: i/o space, memory space enabled
pchb1 at pci1 dev 11 function 0
pchb1: Apple Computer UniNorth Host-PCI Bridge (rev. 0x00)
obio0 at pci1 dev 23 function 0: addr 0x80000000
obio0: enabling KeyLargo internal modem
zsc0 at obio0 irq 22,23
zstty0 at zsc0 channel 0
zstty1 at zsc0 channel 1
snapper0 at obio0 offset 0x10000: irq 30,1,2
pmu0 at obio0 offset 0x16000 irq 47:  rev. 12
pmu0: initializing RTC
pmu0: power-mgt not configured
ki2c1 at obio0
iic2 at ki2c1: I2C bus
deq0 at ki2c1 Apple Digital Equalizer, addr 0x68
wdc0 at obio0 offset 0x1f000 irq 19, level triggered: DMA transfer
atabus0 at wdc0 channel 0
wdc1 at obio0 offset 0x20000 irq 20, level triggered: DMA transfer
atabus1 at wdc1 channel 0
wdc2 at obio0 offset 0x21000 irq 21, level triggered: DMA transfer
atabus2 at wdc2 channel 0
snapper0: codec: TAS3001
audio0 at snapper0: full duplex
ohci0 at pci1 dev 24 function 0: Apple Computer KeyLargo USB Controller (rev. 
ohci0: interrupting at irq 27
ohci0: OHCI version 1.0
usb0 at ohci0: USB revision 1.0
ohci1 at pci1 dev 25 function 0: Apple Computer KeyLargo USB Controller (rev. 
ohci1: interrupting at irq 28
ohci1: OHCI version 1.0
usb1 at ohci1: USB revision 1.0
uninorth2 at mainbus0
pci2 at uninorth2 bus 0
pci2: i/o space, memory space enabled
pchb2 at pci2 dev 11 function 0

>Hash: SHA1
>On Feb 2, 2011, at 8:32 PM, Donald Lee wrote:
>> When I boot from disk (not from CD!), the speaker starts pumping
>> out "white noise", which I kill with
>>      dd if=/dev/audio of=/dev/hull bs=1 count=1
>> Has anyone else run into this?
>> The machine is a "Quicksilver" G4, running NetBSD 5.0.2
>What kind of audio hardware is it? I only have a snapper and various different 
>awacs models here and they don't show this behaviour. It's possible that some 
>mixer/output/whatever settings don't get committed to the hardware until 
>something actually touches them.
>Guess I need to get me one of the later G4 models one of these days.
>have fun
>Version: GnuPG v1.4.7 (Darwin)

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