[alsa-devel] nvidia initial sound being skipped

[David Shirley]

Hi All,

I just want to say I upgraded to kernel 2.6.36 today and still miss
the first 0.5seconds or so of the sound output.

Again I have ruled out player - mplayer, aplay and audacious all do it

I have ruled out source format - both flac and the wav decoded version
have the same problem.

I have also ruled out physical connection to the AVR, both HDMI and
SPDIF exhibit the same problem.

Any ideas?

Cheers
Dave

On 16 November 2010 20:57, David Shirley <tephra at gmail.com> wrote:
> Hi Developers,
>
> I am using an nvidia MCP78 to connect to a Denon 1910 AVR via HDMI.
>
> I was using Kernel 2.6.32.21 and noticed that the initial few seconds
> of my songs was being chopped off.
>
> After seeing http://www.spinics.net/lists/alsa-devel/msg29408.html I
> upgraded to 2.6.35.8 (which has that fix in it) and the problem was
> been reduced considerably.
>
> But it is still occurring to some extent.
>
> So to see if the HDMI was the problem I changed it to coax spdif - no
> change/same problem.
>
> Now I think it could be mplayer, so I try audacious - no change/same problem.
>
> Now I think it could be the flac file/decoding, so I decode the flac
> to wav and use aplay - no change/same problem.
>
> The ONLY way I can get the first 0.5seconds of the file to play is by
> using audacious and then MANUALLY rewinding (by dragging the scroll
> bar thingy) back to the start... then it will play (on either flac or
> wav)
>
> Co-incidentally when I do this I get the following error message
> dumped to console:
> alsa: snd_pcm_prepare failed: Device or resource busy.
>
> I hope someone can help :)
>
> I am happy to get debug or whatever - just let me know what you need!
>
> mythtv at crystal:~$ aplay -l
> **** List of PLAYBACK Hardware Devices ****
> card 0: NVidia [HDA NVidia], device 0: ALC1200 Analog [ALC1200 Analog]
>  Subdevices: 1/1
>  Subdevice #0: subdevice #0
> card 0: NVidia [HDA NVidia], device 1: ALC1200 Digital [ALC1200 Digital]
>  Subdevices: 1/1
>  Subdevice #0: subdevice #0
> card 0: NVidia [HDA NVidia], device 3: NVIDIA HDMI [NVIDIA HDMI]
>  Subdevices: 1/1
>  Subdevice #0: subdevice #0
>
> lspci -vvvv
> 00:07.0 Audio device: nVidia Corporation MCP72XE/MCP72P/MCP78U/MCP78S
> High Definition Audio (rev a1)
>        Subsystem: ASUSTeK Computer Inc. M3N72-D
>        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR- FastB2B- DisINTx-
>        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
>        Latency: 0 (500ns min, 1250ns max)
>        Interrupt: pin A routed to IRQ 11
>        Region 0: Memory at fe020000 (32-bit, non-prefetchable) [size=16K]
>        Capabilities: [44] Power Management version 2
>                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
> PME(D0-,D1-,D2-,D3hot+,D3cold+)
>                Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
>        Kernel driver in use: HDA Intel
>
> Cheers
> David
>