[SLL] Speaking of on-topic...

[Derek Simkowiak]

/J> Only ALSA drivers are loaded./

    Thanks for the correction.  Ubuntu 8.04 on my laptop shows the same 
ALSA drivers (w/OSS compat).

/J> Its possible SLED10 still ships both ALSA and OSS though, I dunno./

    According to Wikipedia, ALSA is the standard Linux sound interface 
as of kernel 2.5.

 From http://en.wikipedia.org/wiki/Open_Sound_System:

"OSS is the standard up through the 2.4 series of official (kernel.org) 
Linux kernels. ALSA was added starting with 2.5, and in those versions, 
Linux kernel authors marked OSS as deprecated. 4Front continued to 
develop OSS outside of Linux kernel.

ALSA provides an optional OSS emulation mode that appears to programs as 
if it were OSS. Similarly, there is an ALSA emulation mode in the Linux 
implementation of OSS."


--Derek

P.S.> Another correction: OSS stands for "Open Sound System", not "Open 
Source Sound".

Jarod Wilson wrote:
> On Mon, 2008-06-09 at 13:38 -0700, Derek Simkowiak wrote:
>   
>> Kurt> I switched from the ALSA HDA Intel to the Analog Devices AD1894, and
>> it started working.
>> [...]
>> Jarod> Not quite sure what you mean there... the ALSA HDA Intel driver is what
>> should be driving sound, the Analog Devices AD1894 is the actual audio
>> codec used by this variant of an HDA Intel sound card.
>>
>>     Is it possible this is an ALSA vs. OSS ("Open Source Sound")
>> driver issue?  Sometimes OSS works but not ALSA, or vice versa.
>>
>>     Perhaps the configuration change Kurt made triggered the loading
>> of the OSS sound drivers, thus activating sound.
>>
>>     Jarod's lsmod command shows that both ALSA and OSS are loaded on
>> his system: snd_hda_intel is ALSA, and the snd_pcm_oss is OSS.
>>     
>
> Incorrect. Only ALSA drivers are loaded. The snd-pcm-oss module is
> ALSA's OSS-compat module, it provides nothing but OSS compatibility
> interfaces for apps that still need them.
>
> $ modinfo snd-pcm-oss |grep description
> description:    PCM OSS emulation for ALSA.
>
>
> Its possible SLED10 still ships both ALSA and OSS though, I dunno.
>
>
>
>