Hi Samuel,
Should I be posting back to the Alsa mailing list? I'm not sure how this works,
I ran the command: sudo tail /var/log/kern.log the output is below, is this
what is needed or do I need more log files?
Jun 23 22:56:50 Server kernel: [ 126.014136] usb 1-14: cannot get ctl value:
req = 0x81, wValue = 0x101, wIndex = 0xa00, type = 1Jun 23 22:57:49 Server
kernel: [ 184.943458] usb 1-14: cannot get ctl value: req = 0x81, wValue =
0x101, wIndex = 0xa00, type = 1Jun 23 22:57:49 Server kernel: [ 184.946336]
usb 1-14: cannot get ctl value: req = 0x81, wValue = 0x101, wIndex = 0xa00,
type = 1Jun 23 22:57:49 Server kernel: [ 184.955676] usb 1-14: cannot get ctl
value: req = 0x81, wValue = 0x101, wIndex = 0xa00, type = 1Jun 23 23:02:36
Server kernel: [ 472.236270] usb 1-14: 1:1: usb_set_interface failed (-71)Jun
23 23:04:33 Server kernel: [ 588.755317] usb 1-14: cannot get ctl value: req =
0x81, wValue = 0x101, wIndex = 0xa00, type = 1
Stu
From: stusmi...@hotmail.com
To: samuel.engelma...@sigfox.com
Subject: RE: [Alsa-user] Unable to set hw params - protocol error
Date: Wed, 24 Jun 2015 13:18:48 +0000
Thank you for the reply Samuel,
I'm on a steep learning curve here and have never used logs with Linux,
Should I type
sudo tail /var/log/messages
after plugging in my usb card?
Will this be the best method to discover if my Kernel was compiled with DEBUG?
What should I look for here?
not sure about the kern.log either, what command should I issue?
any pointers as to how I should go about deciphering the logs and getting them
to you would be great,
Sorry to be such a noob at this,
Stu
Date: Wed, 24 Jun 2015 14:10:12 +0200
Subject: Re: [Alsa-user] Unable to set hw params - protocol error
From: samuel.engelma...@sigfox.com
To: stusmi...@hotmail.com
CC: alsa-user@lists.sourceforge.net
Hi Stu,
it looks like Alsa is having trouble retrieving mixer control information from
the device,
or a quirk is missing, or something like that.
Recent kernels have a new usb_audio_dbg() feature that dynamically enable
printing of debug information for usb audio.
If you kernel was compiled with DEBUG, this information should be logged in
messages or kern.log
Otherwise you need to recompile with this option or with DYNAMIC_DEBUG option,
and then activate debug traces for the mixer using the command:
echo "file mixer.c" > /sys/kernel/debug/dynamic_debug/control
Activating traces for any file located under "sound/usb/" could also be useful.
Then, plug your card, try to aplay and amixer, and let us know what comes out.
Hope this helps,
Sam
2015-06-24 13:20 GMT+02:00 noblesavage114 <stusmi...@hotmail.com>:
Have made a 48K 16bit wav file for testing and get error msg:
stu@Server:~$ sudo aplay -D plughw:1,0 /media/Disk2/Rehab.wavPlaying WAVE
'/media/Disk2/Rehab.wav' : Signed 16 bit Little Endian, Rate 48000 Hz,
Stereoaplay: set_params:1297: Unable to install hw params:ACCESS:
RW_INTERLEAVEDFORMAT: S16_LESUBFORMAT: STDSAMPLE_BITS: 16FRAME_BITS:
32CHANNELS: 2RATE: 48000PERIOD_TIME: 125000PERIOD_SIZE: 6000PERIOD_BYTES:
24000PERIODS: 4BUFFER_TIME: 500000BUFFER_SIZE: 24000BUFFER_BYTES:
96000TICK_TIME: 0
alsamixer gives error when I try to select xmos:
cannot load mixer controls: Protocol error
The output from the alsa info script is here:
http://www.alsa-project.org/db/?f=fbc3b0551ec41aa0398a12bee53056a1acfafe32
lsusb -v - is available at:
http://www.justvape.co.uk/LSUSB.htm
Have spent a weekend on this before I called for help, any advice would be
great - specifically if this xmos board will not work then I will know - it
works under windows fine.
It is the 10pin U8 xmos daughter board for chinese AK4399 dac also for the
ES9018 Dac i Believe
Stu
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