[alsa-devel] SB X-Fi driver status update

[The Source]

Alexey Bazhin пишет:
> On Thu, 16 Oct 2008 15:18:32 +0200
> Takashi Iwai <tiwai at suse.de> wrote:
>
>   
>> Hi,
>>
>> now I'm stabilizing the driver a bit.  I hope it won't hang up any
>> more (so often), and make you happy testing. 
>>     
> speakers-test and aplay works perfect with both base_rates and any
> sample rate (tried only stereo samples), but mplayer become more glitchy
> - sound pauses for a bit every 5-10 seconds, dmesg included.
>
>   
>> - As default, the driver works only as a constant sample rate, either
>>   48000 or 96000 (default).  The rate can be changed via the module
>>   option base_rate.  For enabling the continuous rate support (it was
>>   on before), define XXX_CONT_RATE in sbxfi.c.
>>     
> only tried speakers-test:
> 96khz works fine
> 48khz plays slow (frequency is lower than it should be)
> 44.1khz silent, speakers-test ends with error, dmesg included.
>
> root at mayonaka:~# speaker-test -c 2 -r 44100 -t sine
>
> speaker-test 1.0.15
>
> Playback device is default
> Stream parameters are 44100Hz, S16_LE, 2 channels
> Sine wave rate is 440.0000Hz
> Rate set to 44100Hz (requested 44100Hz)
> Buffer size range from 32 to 16384
> Period size range from 32 to 16384
> Using max buffer size 16384
> Periods = 4
> was set period_size = 4096
> was set buffer_size = 16384
>  0 - Front Left
> Write error: -5,Input/output error
> xrun_recovery failed: -5,Input/output error
> Transfer failed: Operation not permitted
>  
>   
>> - If playback works well, try to define XXX_USE_SG in sbxfi.c.  This
>>   will make the driver using SG buffer instead of continuous pages.
>>     
> works absolutely the same as without it.
>
>   
>> - Also, test SBXFI_DMA_MASK being DMA_32BIT_MASK, especially if you
>>   have RAM more than 2GB.
>>     
> i have 3GB RAM on my test box, everything worked fine with 32-bit mask,
> but i haven't done many tests...
>
>   
>> - You can try dmix as well.  E.g. simply run like 
>> 	% aplay -Dplug:dmix:0 foo.wav
>>     
> works fine.
>
>   
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>   
--I tested several players with alsa (oss causes oops):
--xine works fine
--xmms ok
--mplayer constantly shows some error message I wasn't able to read --(it's
--blinking) and sound pauses for ~0.2 second every ~27 seconds.

mplayer error message was about PCM not found. Just set mixer channel to 
master in mplayer alsa output settings to avoid it. This won't help 
solve the sound-pause problem however.