[alsa-devel] 1.0.16->1.0.17 regression for some HDA NVidia's

[Takashi Iwai]

At Fri, 11 Jul 2008 00:26:26 +0300,
Ozan Çağlayan wrote:
> 
> Takashi Iwai wrote:
> > At Thu, 10 Jul 2008 19:41:45 +0300,
> > Ozan Çağlayan wrote:
> >   
> >> Takashi Iwai wrote:
> >>     
> >>> At Tue, 08 Jul 2008 00:31:43 +0300,
> >>> Ozan Çağlayan wrote:
> >>>   
> >>>       
> >>>> Takashi Iwai wrote:
> >>>>     
> >>>>         
> >>>>> At Sun, 06 Jul 2008 19:18:01 +0300,
> >>>>> Ozan Çağlayan wrote:
> >>>>>   
> >>>>>       
> >>>>>           
> >>>>>> Everything seems OK with those onboard audio chipsets but there's 
> >>>>>> absolutely no sound.
> >>>>>> We have 2 bug reports on our bug tracking system indicating this 
> >>>>>> regression for MCP51, MCP61 and MCP73.
> >>>>>>
> >>>>>> Here are the URL's for alsa-info.sh output's:
> >>>>>>
> >>>>>> MCP51: http://pastebin.ca/1062418
> >>>>>> MCP61: http://pastebin.ca/1058482
> >>>>>> MCP73: http://pastebin.ca/1058319
> >>>>>>
> >>>>>> Those users have recently reported that downgrading to 1.0.16 series 
> >>>>>> solves the problem.
> >>>>>>     
> >>>>>>         
> >>>>>>             
> >>>>> Could you run alsa-info.sh on 1.0.16, too?  Then we can compare
> >>>>> between working and non-working states.
> >>>>>
> >>>>>
> >>>>> thanks,
> >>>>>
> >>>>> Takashi
> >>>>>   
> >>>>>       
> >>>>>           
> >>>> Hi,
> >>>>
> >>>> I've also entered a bug report for this problem which includes the two 
> >>>> outputs:
> >>>>
> >>>> https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4038
> >>>>     
> >>>>         
> >>> The first thing to check is that you are using pulse plugin.
> >>> Is it intended, and confirmed to work?
> >>>
> >>> The next thing to check is whether 1.0.16 driver works with the same 
> >>> environment (1.0.17 lib, utils, etc) -- that is, your 1.0.16 alsa-info
> >>> output.  If yes, get alsa-info.sh output again, then install 1.0.17
> >>> driver again and re-test.  Get alsa-info.sh output on 1.0.17 again
> >>> (for non-working) to compare exactly.
> >>>   
> >>>       
> >> First the problem is not present when pulseaudio is stopped. And also, 
> >> we can get sound with 1.0.17rc1 too. So briefly:
> >>
> >> 1.0.16 + pulse -> works well
> >> 1.0.17rc1 + pulse -> works well
> >> 1.0.17rc1,rc2 + pulse -> No sound.
> >>
> >> It seems that something is broken for these chipsets in either alsa or 
> >> pulse tree. Any ideas for your alsa-{driver,lib,plugins} part?
> >>     
> >
> > Try to Compare alsa-info.sh outputs between these versions.
> > If there is a significant difference in codec#* proc files, then
> > something was changed in the driver side.  If not, it's pulse
> > problem.
> >   
> It seems that we've found the problem.
> MCP51 and MCP61 works well when the 1.0.17 introduced module parameter 
> bdl_pos_adj is explicitly set to 0 when probing the snd-hda-intel module.

To make sure: bdl_pos_adj=32 or higher doesn't work, too?
Also, if you set bdl_pos_adj=0, do you get any warning messages?

It's fine to take bdl_pos_adj=0 as default for Nvidia chips.  But,
basically this value (when it's big enough) shouldn't disable the
sound at all.


thanks,

Takashi