[alsa-devel] CS4232 Playback bug on Tecra 500

[Takashi Iwai]

At Sat, 24 Jan 2009 09:26:06 +0100,
Krzysztof Helt wrote:
> 
> On Thu, 22 Jan 2009 17:37:48 +0100
> Takashi Iwai <tiwai at suse.de> wrote:
> 
> > At Thu, 22 Jan 2009 17:28:56 +0100,
> > Krzysztof Helt wrote:
> > > Next thing is that your have a second driver loaded: 
> > > the snd-cs4236. Do not load this driver. AFAIR, the 
> > > snd-cs4236 driver should be blacklisted or removed
> > > on laptop with the cs4232 chip and PNP BIOS. The 
> > > cs4236 and cs4232 have the same PNP BIOS id-s.
> > > The snd-cs4236 was incorrectly loaded instead of 
> > > the snd-cs4232 at least on my laptop (old Dell).
> > 
> > Isn't there any way to check this conflict between CS4232 and CS4236?
> > If we can know that the particular card is for snd-cs4232, snd-cs4236
> > could give a warning and quit...
> > 
> 
> I have opened my laptop and it has the CS4237B chipset (the one
> the Dell states for this model). 
> A problem is with ALSA drivers. The snd-cs4232 is the only driver
> which supports pnpbios. The snd-cs4236 does not so it does not
> recognize the card. 
> 
> An ultimate solution would be to merge the snd-cs4236-lib into
> the wss-lib (as Rene Herman proposed some time ago) then
> prepare a single driver for all cs423x cards.

Agreed.  I don't think that would be too much job, just checking
cs4236_lib.c.  Only the testing isn't easy nowadays just lack of
available hardware.


Takashi