Hello.
This.patch works like a charm.
aplay is good and also mplayer works fine.
Thanks.
----- Original Message -----
From: "Takashi Iwai" <tiwai@xxxxxxx>
To: "Peter Hanzel" <hanzelpeter@xxxxxxxxx>
Sent: Tuesday, July 21, 2009 3:17 PM
Subject: Re: ALSA in kernel 2.6.30.1 in VMWare
> At Tue, 21 Jul 2009 14:06:39 +0200,
> Peter Hanzel wrote:
>>
>> Hello.
>>
>> The pcm_lib.c from 2.6.29 is working.
>> Exactly this:
>> git checkout 1c85cc64456c97f3b265788abafec5c482c6a908
>> sound/core/pcm_lib.c
>>
>> Is the good one. I recompiled 2.6.30 with this pcm_lib.c from that
>> checkout
>> and it works like a charm.
>
> OK. Then ignoring the bogus update would be a solution.
> Try the patch below with the latest code. Does it work?
> (You shouldn't set xrun_debug proc file in this case. Otherwise you'll
> get many messages.)
>
>
> Takashi
>
> ---
> diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
> index 333e4dd..3b673e2 100644
> --- a/sound/core/pcm_lib.c
> +++ b/sound/core/pcm_lib.c
> @@ -244,18 +244,27 @@ static int snd_pcm_update_hw_ptr_interrupt(struct
> snd_pcm_substream *substream)
> delta = new_hw_ptr - hw_ptr_interrupt;
> }
> if (delta < 0) {
> - delta += runtime->buffer_size;
> + if (runtime->periods == 1)
> + delta += runtime->buffer_size;
> if (delta < 0) {
> hw_ptr_error(substream,
> "Unexpected hw_pointer value "
> "(stream=%i, pos=%ld, intr_ptr=%ld)\n",
> substream->stream, (long)pos,
> (long)hw_ptr_interrupt);
> +#if 1
> + /* simply skipping the hwptr update seems more
> + * robust in some cases, e.g. on VMware with
> + * inaccurate timer source
> + */
> + return 0; /* skip this update */
> +#else
> /* rebase to interrupt position */
> hw_base = new_hw_ptr = hw_ptr_interrupt;
> /* align hw_base to buffer_size */
> hw_base -= hw_base % runtime->buffer_size;
> delta = 0;
> +#endif
> } else {
> hw_base += runtime->buffer_size;
> if (hw_base >= runtime->boundary)
>
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