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SubjectRe: i810_audio.c: Clicks while playing audio
Naren Devaiah wrote:
> Hi,
> On a HP Vectra VL 400 with a i815 motherboard playing a .wav file (haven't
> tried anything else) causes the sound to be played with a lot of periodic
> clicks.
> The kernel is 2.4.3
> dmesg shows:
> Intel 810 + AC97 Audio, version 0.01, 17:25:00 Apr 6 2001
> PCI: Enabling device 00:1f.5 (0000 -> 0001)
> PCI: Found IRQ 9 for device 00:1f.5
> PCI: The same IRQ used for device 00:1f.3
> PCI: Setting latency timer of device 00:1f.5 to 64
> i810: Intel ICH 82801AA found at IO 0x1300 and 0x1200, IRQ 9
> ac97_codec: AC97 Audio codec, id: 0x4352:0x5934 (Cirrus Logic CS4299)
> i810_audio: 9568 bytes in 50 milliseconds
> i810_audio: DMA overrun on send
> i810_audio: DMA overrun on send
> lsmod show:
> root@darkstar:~# lsmod
> Module Size Used by
> i810_audio 14084 0
> ac97_codec 7908 0 [i810_audio]
> My question is: What does "DMA overrun on send" mean?

It means it sounds like you have an older version of the driver (older here
means "not my latest patch"). I sent my stuff to Alan, and it was in the ac
series kernels, but I don't know what happened to make it into 2.4.3. I'm
fixing one last known bug in the driver tonight, and when I'm done I'll put a
patch against 2.4.3 on my web site and drop a note here.


Doug Ledford <>
Please check my web site for aic7xxx updates/answers before
e-mailing me about problems
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