Re: [Openvortex-dev] Stereo swapping.

[Sipos Ferenc]

Hi!

Yes, I'm using the latest cvs and chip and dale bug exists with a mx-300
card and redhat 9 system and gcc 3.3 if that matters. It's an athlon
board with via chipset, esd killed and using gnome, I installed the alsa
modules, unload the old binary driver, restart x, manually load the oss
modules of alsa. Everytime the cvs is being changed I make a sync in
hope of this bug has gone.

Paco

ps: two things that I will try out, remove the mem=nopentium line from
grub ( I use the binary nvidia modules and this line is needed to not
hang the machine) and remove the setpci line form the rc.local script.


Ha hihetek a szemenek, Manuel Jander feladótól 2003.06.29. v keltezéssel
következő érkezett drótpostán:
> Hello,
> 
> Thanks to everyone who sent the requested info. Unfortunately i have to
> admit that i found no common element between the people having Clicks,
> stereo swapping or high speed playback :(
> 
> Regarding clicks and stereo swapping, i think these have the same root. 
> I think that stereo swapping can be caused by some DMA transfer being
> missed. Since the data is 16 bit, and they are multiplexed
> (interleaved), there must be a loss of a 16bit word to cause loosing
> synchronisity.
> On the Aureal Vortex card, the DMA engine takes one sample and puts it
> into the left pipeline, takes another and puts it into the right
> pipeline, and then again the left, right, etc. If one sample gets lost,
> the card would put the samples into the wrong pipeline.
> Maybe some PCI features as Write Merge/Combining are involved ?
> 
> The infamous Chip'n Dale bug... I thought it was gone. Those people
> still having fast play problems: "Are you really sure you are using the
> latest CVS ALSA driver ????". 
> 
> Best Regards
> 
> Manuel Jander.
> 
> On Sat, 2003-06-28 at 03:28, J. Gordon Wolfe wrote:
> > On Fri, 2003-06-27 at 18:08, Manuel Jander wrote:
> > > I got an idea:
> > > 
> > > What versions of GCC are you using ? I used GCC-3.2 since i started
> > > working on the ALSA driver. Now i'm using GCC 3.3. What versions are you
> > > using ? Please other people report that too please.
> > > 
> > > Best Regards
> > > 
> > > Manuel Jander
> > 
> > GCC 3.2.2 for me
> > 
> >  - Gordon
> 
> 
> 
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