Re: [Alsa-user] alsa-lib and RME HDSP9652

[Anders G. <and...@gm...>]

7 aug 2012 kl. 02:40 skrev Andre Schramm <and...@io...>:

> Am Tue, 7 Aug 2012 00:11:37 +0200
> schrieb Anders Genell <and...@gm...>:
> 
>> 
>> Below are examples of the error I got from mplayer and OpenAL
>> respectively. mplayer -ao alsa file.wav
>> [AO_ALSA] alsa-lib: pcm_hw.c:326:(snd_pcm_hw_hw_params)
>> SNDRV_PCM_IOCTL_HW_PARAMS failed (-16): Device or resource busy
>> [AO_ALSA] Unable to set hw-parameters: Device or resource busy 
>> 
>> OpenAL (via chromium-bsu) 
>> AL lib: alsa.c:642: set params failed: Device or resource busy
>> 
>> Any ideas?
>> 
> Sounds like sth. is already using the device. Try:
> 
> $ cat /proc/asound/cardX/pcm0p/sub0/status
> 
> and check the result (replace X with the right card number). It should
> report "closed", otherwise you will get the PID of the process that is
> using it.
> 
> 
> Regards,
>   Andre

Thanks for the reply, but alas, it is closed:

~$ cat /proc/asound/card0/pcm0p/sub0/info
card: 0
device: 0
subdevice: 0
stream: PLAYBACK
id: RME Hammerfall HDSP 9652
name: RME Hammerfall HDSP 9652
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 1
subdevices_avail: 1


~$ cat /proc/asound/card0/pcm0p/sub0/status
closed

Also, there is no problem with playback using e.g. aplay -D plughw so the card is not busy as such. When I do play something with aplay I get

~$ cat /proc/asound/card0/pcm0p/sub0/hw_params
access: MMAP_NONINTERLEAVED
format: S32_LE
subformat: STD
channels: 26
rate: 44100 (44100/1)
period_size: 4096
buffer_size: 8192

~$ cat /proc/asound/card0/pcm0p/sub0/status
state: RUNNING
owner_pid   : 10171
trigger_time: 57406.852376233
tstamp      : 57431.833201480
delay       : 8192
avail       : 0
avail_max   : 4096
-----
hw_ptr      : 1097728
appl_ptr    : 1105920

Regards,
Anders