Hello,
My project requires microphone input. Currently what is working is USB C to USB A to Sabrent USB stereo adapter.*
However, this configuration is precarious and awkward. And so I purchased a USB C DAC in an attempt to make everything more compact. What I received in the mail is one of these Realtek ALC5686 5PCS Hifi Type C Chip Audio Headphone Plug ALC5686 Digital DAC Decoding Lossless Sound Quality 32bit 384khz USB C Adapter Silver|Plug & Connectors| - AliExpress
This is causing problems. The DAC is recognized by the Radxa Zero (I am using the Ubuntu image) but within a few seconds of plugging in, the whole system locks up. Here is the dmesg:
[ 42.996517] usb 1-1: new high-speed USB device number 2 using xhci-hcd
[ 43.196427] usb 1-1: New USB device found, idVendor=0bda, idProduct=4be2, bcdDevice= 0.01
[ 43.196447] usb 1-1: New USB device strings: Mfr=3, Product=1, SerialNumber=2
[ 43.196461] usb 1-1: Product: Realtek USB2.0 Audio
[ 43.196474] usb 1-1: Manufacturer: Realtek
[ 43.196485] usb 1-1: SerialNumber: 201405280001
[ 43.254249] input: Realtek Realtek USB2.0 Audio as /devices/platform/soc/ffe09000.usb/ff500000.usb/xhci-hcd.0.auto/usb1/1-1/1-1:1.3/0003:0BDA:4BE2.0001/input/input0
[ 43.319055] hid-generic 0003:0BDA:4BE2.0001: input,hidraw0: USB HID v1.11 Device [Realtek Realtek USB2.0 Audio] on usb-xhci-hcd.0.auto-1/input3
[ 43.585231] usb 1-1: cannot get ctl value: req = 0x81, wValue = 0x100, wIndex = 0x400, type = 0
[ 43.600882] usbcore: registered new interface driver snd-usb-audio
[ 49.216047] xhci-hcd xhci-hcd.0.auto: WARN Event TRB for slot 1 ep 2 with no TDs queued?
[ 49.217393] xhci-hcd xhci-hcd.0.auto: WARN Event TRB for slot 1 ep 2 with no TDs queued?
[ 49.218636] xhci-hcd xhci-hcd.0.auto: WARN Event TRB for slot 1 ep 2 with no TDs queued?
[ 49.221100] xhci-hcd xhci-hcd.0.auto: WARN Event TRB for slot 1 ep 2 with no TDs queued?
[ 49.222403] xhci-hcd xhci-hcd.0.auto: WARN Event TRB for slot 1 ep 2 with no TDs queued?
[ 49.224175] xhci-hcd xhci-hcd.0.auto: WARN Event TRB for slot 1 ep 2 with no TDs queued?
[ 49.225388] xhci-hcd xhci-hcd.0.auto: WARN Event TRB for slot 1 ep 2 with no TDs queued?
[ 49.226769] xhci-hcd xhci-hcd.0.auto: WARN Event TRB for slot 1 ep 2 with no TDs queued?
[ 49.228543] xhci-hcd xhci-hcd.0.auto: WARN Event TRB for slot 1 ep 2 with no TDs queued?
Those last messages are repeated until I unplug the adapter, at which point the system returns to normal.
Anybody know what could be the cause of this? And is this something that can be fixed?
*For those who maybe interested, I have installed NDI SDK and GStreamer for low latency wireless audio.