I am on 14.04, 64 bit, a new Samsung laptop bought earlier this year.
Connecting via USB 2 or USB 3 to my Musical Fidelity M1 CLiC Async USB
DAC gives the crackles and interruptions as described above (analogue or
digital). When connected it is described as a PCM2706 Audio Codec
Digital Stereo (IEC958). I have tried the Analogue and Digital
configurations. Quite often Pulseaudio just stops and restarts.
Connecting via USB 2 or USB 3 to my Meridian Explorer Async USB DAC
works fine.
On my old (2003) Sony Laptop, recently retired, it worked fine.
An extract from my syslog follows. I had just disconnected from the USB
3 port and connected to my USB 2 port. This is, whatever the log may
say, not a USB 3 device or port.
WIll there really be no fix? It seems pretty fundamental for many Async
USB DACs.
Dec 6 13:31:55 twpsamlinux kernel: [ 418.785848] HDMI ATI/AMD: no speaker
allocation for ELD
Dec 6 13:33:20 twpsamlinux kernel: [ 503.543057] usb 5-1: USB disconnect,
device number 2
Dec 6 13:33:29 twpsamlinux kernel: [ 512.148960] usb 3-1: new full-speed USB
device number 2 using ohci-pci
Dec 6 13:33:29 twpsamlinux kernel: [ 512.316151] usb 3-1: New USB device
found, idVendor=08bb, idProduct=2706
Dec 6 13:33:29 twpsamlinux kernel: [ 512.316173] usb 3-1: New USB device
strings: Mfr=1, Product=2, SerialNumber=0
Dec 6 13:33:29 twpsamlinux kernel: [ 512.316185] usb 3-1: Product: USB Audio
DAC
Dec 6 13:33:29 twpsamlinux kernel: [ 512.316195] usb 3-1: Manufacturer:
Burr-Brown from TI
Dec 6 13:33:29 twpsamlinux kernel: [ 512.370306] input: Burr-Brown from TI
USB Audio DAC as
/devices/pci0000:00/0000:00:12.0/usb3/3-1/3-1:1.2/input/input12
Dec 6 13:33:29 twpsamlinux kernel: [ 512.370910] hid-generic
0003:08BB:2706.0002: input,hidraw0: USB HID v1.00 Device [Burr-Brown from TI
USB Audio DAC ] on usb-0000:00:12.0-1/input2
Dec 6 13:35:01 twpsamlinux kernel: [ 604.390700] HDMI ATI/AMD: no speaker
allocation for ELD
Dec 6 13:35:01 twpsamlinux kernel: [ 604.687996] HDMI ATI/AMD: no speaker
allocation for ELD
Dec 6 13:35:01 twpsamlinux kernel: [ 604.987999] HDMI ATI/AMD: no speaker
allocation for ELD
Dec 6 13:35:02 twpsamlinux kernel: [ 605.288020] HDMI ATI/AMD: no speaker
allocation for ELD
Dec 6 13:35:02 twpsamlinux kernel: [ 605.588042] HDMI ATI/AMD: no speaker
allocation for ELD
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https://bugs.launchpad.net/bugs/1136110
Title:
USB Audio Codec choppy playback
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