I have a laptop using the snd_hda_intel driver under 2.6.16. When I
first install the module, aplay works with the hardware device:
aplay -Dhw:0,0 sound.wav
plays, as many times as I try to play it. But if I ever go through dmix:
aplay -Dplug:dmix sound.wav
then I get no sound, and will never get sound again, even if I try to
go back to using the hardware device directly. The only way I can
reset it is to unload and reload the module.
Running
aplay -Dplug:hw sound.wav
plays the sound fine and does not mess up further attempts to play.
lspci | grep Audio:
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High
Definition Audio Controller (rev 02)
lspci -v for that device says:
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High
Definition Audio Controller (rev 02)
Subsystem: ASUSTeK Computer Inc.: Unknown device 1447
Flags: bus master, fast devsel, latency 0, IRQ 209
Memory at febfc000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [50] Power Management version 2
Capabilities: [60] Message Signalled Interrupts: 64bit+ Queue=0/0
Enable+
Capabilities: [70] Express Unknown type IRQ 0
Capabilities: [100] Virtual Channel
Capabilities: [130] Unknown (5)
/var/log/messages says, when loading the module:
ACPI: PCI Interrupt 0000:00:1b.0[A] -> GSI 21 (level, low) -> IRQ 193
This is alsa-driver 1.0.13, kernel 2.6.16-20.1smp from CentOS 4.3.
alsa-lib version 1.0.13.
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