hmmm. my associate needs a USB sound thing in his stack... its
always worked before, but when I brought him up on a new system with
6.7, the device is recognized....
usb 1-1: New USB device found, idVendor=08bb, idProduct=2704
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 1-1: Product: USB Audio DAC
usb 1-1: Manufacturer: Burr-Brown from TI
usb 1-1: configuration #1 chosen from 1 choice
usb 1-1: ctrl urb status -75 received
input: Burr-Brown from TI USB Audio DAC as
/devices/pci0000:00/0000:00:01.2/usb1/1-1/1-1:1.2/input/input3
generic-usb 0003:08BB:2704.0001: input,hidraw0: USB HID v1.00 Device
[Burr-Brown from TI USB Audio DAC ] on
usb-0000:00:01.2-1/input2
and it shows up as...
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: I82801AAICH [Intel 82801AA-ICH], device 0: Intel ICH [Intel
82801AA-ICH]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: DAC [USB Audio DAC], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
but when he tries to connect to it, like with this test command...
$ mpg123 -a hw:1,0 /audio/36790.mp3
Playing MPEG stream 1 of 1: 36790.mp3 ...
[alsa.c:118] error: initialize_device(): cannot set hw params
[audio.c:643] error: failed to open audio device
[mpg123.c:547] error: failed to reset audio device: Broken pipe
and I noted some kernel errors in dmesg...
usb 1-1: cannot submit urb 0, error -22: internal error
usb 1-1: cannot submit urb 0, error -22: internal error
usb 1-1: cannot submit urb 0, error -22: internal error
reading a random forum thread found via googling that error suggested
someone else had this problem with 6.7 and reverted. I was running
$ uname -a
Linux kfat.com 2.6.32-573.7.1.el6.x86_64 #1 SMP Tue Sep 22 22:00:00 UTC
2015 x86_64 x86_64 x86_64 GNU/Linux
So, reverting to a older kernel fixed this, and it works fine.
$ uname -a
Linux kfat.com 2.6.32-431.17.1.el6.x86_64 #1 SMP Wed May 7 23:32:49 UTC
2014 x86_64 x86_64 x86_64 GNU/Linux
(I had a 6.5 rpm handy).
any clues? Linux audio has always been a big black box to me.
--
john r pierce, recycling bits in santa cruz
