No USB audio on my Rpi4 (STM MCU32)

Troubleshooting
1

I don’t think it’s Dietpi… maybe a kernel problem but it’s not my dac.
I have searched hard but don’t understand.
I use a Musician Pegasus dac (same as Denafrips) with a STM usb chip.
It works with an Allo USBridge under GentooPlayer.
I wanted to test a new Rpi4 with DietPi which I used before and which I find more flexible… but… nothing!!!
No dac detected while everything works with a dac (xmos).
I don’t have the skills but I would be surprised if the STM is not in the kernel… there should be a trace.
An “lsusb” does not give nothing. :cry:

The same thing under GentooPlayer on the USBridge (Pi3+):

GentooPlayerRpi ~ # lsusb
Bus 001 Device 005: ID 152a:8829 Thesycon Systemsoftware & Consulting GmbH USB HiRes Audio
Bus 001 Device 003: ID 0b95:1790 ASIX Electronics Corp. AX88179 Gigabit Ethernet
Bus 001 Device 002: ID 0451:8142 Texas Instruments, Inc. TUSB8041 4-Port Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
GentooPlayerRpi ~ # uname -a
Linux GentooPlayerRpi 5.10.33-GentooPlayer-CK-MIN-NOGRAPH-EUP100RCU+ #5 SMP PREEMPT Sun May 9 15:54:01 CEST 2021 aarch64 GNU/Linux




 DietPi v7.8.2 :  Device model : RPi 4 Model B (aarch64)
2

are you powering this through the rpi? did this work before? have you updated your firmware for the pi?

3

No, the dac is not powered by the Rpi. It has its own power supply for its circuits and a trigger system for its USB chip.
It detects a 5v signal to recognize that the usb port is connected and switches to its own clean power supply.
This works because on the front panel, it recognises the connected usb.
No problemn with the USBridge (PI3+ compute)
It is on the RPI4 side that there is nothing.
I have not upgraded the RPI that I just bought (which is supposedly a very recent production).
It is possible to check the firmware or to update it via DietPI ?

4

I tried the firmware update command via Dietpi-config.
And in addition, this command.

https://dietpi.com/forum/t/firmware-bootloader-update-raspberry-pi-4/5426/4

I always have after a reboot :

root@DietPi:~# rpi-eeprom-update
*** UPDATE AVAILABLE ***
BOOTLOADER: update available
   CURRENT: Thu Apr 29 16:11:25 UTC 2021 (1619712685)
    LATEST: Mon Nov 22 11:23:32 UTC 2021 (1637580212)
   RELEASE: latest (/lib/firmware/raspberrypi/bootloader/latest)
            Use raspi-config to change the release.

  VL805_FW: Using bootloader EEPROM
     VL805: up to date
   CURRENT: 000138a1
    LATEST: 000138a1

If I try "rpi-eeprom-update -d -a ", it does not work (missing xxxd ??)
[UPDATE]

After reinstalling, update and install the latest version of eeprom (with apt-get install xxd).
Everything is ok… but the “lsusb” remains empty with dac connected (with USB validate) ! :face_with_raised_eyebrow:

root@DietPi:~# rpi-eeprom-update
BOOTLOADER: up to date
   CURRENT: lun. 22 nov. 2021 11:23:32 UTC (1637580212)
    LATEST: lun. 22 nov. 2021 11:23:32 UTC (1637580212)
   RELEASE: latest (/lib/firmware/raspberrypi/bootloader/latest)
            Use raspi-config to change the release.

  VL805_FW: Using bootloader EEPROM
     VL805: up to date
   CURRENT: 000138a1
    LATEST: 000138a1
5

Things are moving forward… but I don’t know how to fix them.
The Pegasus is present, detected at boot … but no permanent identification and it disappears.

An idea or a proposal ?

This is what “dmesg|grep USB” does :

root@DietPi:~# dmesg|grep USB
[    0.701634] xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 1
[    0.702606] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.10
[    0.702613] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.702945] hub 1-0:1.0: USB hub found
[    0.703356] xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 2
[    0.703365] xhci_hcd 0000:01:00.0: Host supports USB 3.0 SuperSpeed
[    0.703569] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.10
[    0.703575] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.703859] hub 2-0:1.0: USB hub found
[    0.709577] usbhid: USB HID core driver
[    0.963227] usb 1-1: new high-speed USB device number 2 using xhci_hcd
[    1.113882] usb 1-1: New USB device found, idVendor=2109, idProduct=3431, bcdDevice= 4.21
[    1.113890] usb 1-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[    1.113896] usb 1-1: Product: USB2.0 Hub
[    1.115068] hub 1-1:1.0: USB hub found
[    1.415238] usb 1-1.3: new high-speed USB device number 3 using xhci_hcd
[    1.520154] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[    1.520165] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    1.520170] usb 1-1.3: Product: USB HiRes Audio
[    2.869119] usb 1-1.3: USB disconnect, device number 3
[    3.099249] usb 1-1.3: new high-speed USB device number 4 using xhci_hcd
[    3.204148] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[    3.204176] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    3.204182] usb 1-1.3: Product: USB HiRes Audio
[    3.893112] usb 1-1.3: USB disconnect, device number 4
[    4.123225] usb 1-1.3: new high-speed USB device number 5 using xhci_hcd
[    4.224052] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[    4.224059] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    4.224065] usb 1-1.3: Product: USB HiRes Audio
[    4.661206] usb 1-1.3: USB disconnect, device number 5
[    4.883245] usb 1-1.3: new high-speed USB device number 6 using xhci_hcd
[    5.380040] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[    5.380047] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    5.380053] usb 1-1.3: Product: USB HiRes Audio
[    6.709477] usb 1-1.3: USB disconnect, device number 6
[    6.931225] usb 1-1.3: new high-speed USB device number 7 using xhci_hcd
[    7.636104] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[    7.636112] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    7.636117] usb 1-1.3: Product: USB HiRes Audio
[    8.757841] usb 1-1.3: USB disconnect, device number 7
[    8.979283] usb 1-1.3: new high-speed USB device number 8 using xhci_hcd
[    9.476135] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[    9.476147] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    9.476154] usb 1-1.3: Product: USB HiRes Audio
[    9.781984] usb 1-1.3: USB disconnect, device number 8
[   10.007225] usb 1-1.3: new high-speed USB device number 9 using xhci_hcd
[   10.108046] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   10.108054] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   10.108060] usb 1-1.3: Product: USB HiRes Audio
[   10.806114] usb 1-1.3: USB disconnect, device number 9
[   11.027225] usb 1-1.3: new high-speed USB device number 10 using xhci_hcd
[   11.524079] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   11.524093] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   11.524099] usb 1-1.3: Product: USB HiRes Audio
[   11.830299] usb 1-1.3: USB disconnect, device number 10
[   12.055225] usb 1-1.3: new high-speed USB device number 11 using xhci_hcd
[   12.839236] usb 1-1.3: new high-speed USB device number 12 using xhci_hcd
[   12.940053] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   12.940060] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   12.940066] usb 1-1.3: Product: USB HiRes Audio
[   13.109950] usb 1-1.3: USB disconnect, device number 12
[   13.331225] usb 1-1.3: new high-speed USB device number 13 using xhci_hcd
[   13.436104] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   13.436116] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   13.436122] usb 1-1.3: Product: USB HiRes Audio
[   14.902741] usb 1-1.3: USB disconnect, device number 13
[   15.355224] usb 1-1.3: new high-speed USB device number 14 using xhci_hcd
[   15.456158] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   15.456171] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   15.456177] usb 1-1.3: Product: USB HiRes Audio
[   16.438953] usb 1-1.3: USB disconnect, device number 14
[   16.663225] usb 1-1.3: new high-speed USB device number 15 using xhci_hcd
[   16.764104] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   16.764112] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   16.764118] usb 1-1.3: Product: USB HiRes Audio
[   17.207048] usb 1-1.3: USB disconnect, device number 15
[   17.431226] usb 1-1.3: new high-speed USB device number 16 using xhci_hcd
[   17.532035] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   17.532047] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   17.532053] usb 1-1.3: Product: USB HiRes Audio
[   18.487273] usb 1-1.3: USB disconnect, device number 16
[   18.711225] usb 1-1.3: new high-speed USB device number 17 using xhci_hcd
[   19.495244] usb 1-1.3: new high-speed USB device number 18 using xhci_hcd
[   19.596090] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   19.596101] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   19.596107] usb 1-1.3: Product: USB HiRes Audio
[   20.023487] usb 1-1.3: USB disconnect, device number 18
[   20.247225] usb 1-1.3: new high-speed USB device number 19 using xhci_hcd
[   20.348056] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   20.348064] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   20.348069] usb 1-1.3: Product: USB HiRes Audio
[   21.047615] usb 1-1.3: USB disconnect, device number 19
[   21.691233] usb 1-1.3: new high-speed USB device number 20 using xhci_hcd
[   21.792100] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   21.792108] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   21.792114] usb 1-1.3: Product: USB HiRes Audio
[   22.327802] usb 1-1.3: USB disconnect, device number 20
[   22.551257] usb 1-1.3: new high-speed USB device number 21 using xhci_hcd
[   22.651993] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   22.652002] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   22.652008] usb 1-1.3: Product: USB HiRes Audio
[   23.351988] usb 1-1.3: USB disconnect, device number 21
[   23.575245] usb 1-1.3: new high-speed USB device number 22 using xhci_hcd
[   23.676034] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   23.676042] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   23.676047] usb 1-1.3: Product: USB HiRes Audio
[   24.120054] usb 1-1.3: USB disconnect, device number 22
[   24.343225] usb 1-1.3: new high-speed USB device number 23 using xhci_hcd
[   24.444070] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   24.444077] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   24.444083] usb 1-1.3: Product: USB HiRes Audio
[   25.399772] usb 1-1.3: USB disconnect, device number 23
[   25.627256] usb 1-1.3: new high-speed USB device number 24 using xhci_hcd
[   25.727997] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   25.728005] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   25.728011] usb 1-1.3: Product: USB HiRes Audio
[   27.448118] usb 1-1.3: USB disconnect, device number 24
[   27.671235] usb 1-1.3: new high-speed USB device number 25 using xhci_hcd
[   27.772102] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   27.772110] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   27.772115] usb 1-1.3: Product: USB HiRes Audio
[   28.472745] usb 1-1.3: USB disconnect, device number 25
[   28.695236] usb 1-1.3: new high-speed USB device number 26 using xhci_hcd
[   28.796026] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   28.796033] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   28.796040] usb 1-1.3: Product: USB HiRes Audio
[   29.240331] usb 1-1.3: USB disconnect, device number 26
[   29.899232] usb 1-1.3: new high-speed USB device number 27 using xhci_hcd
[   30.000155] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   30.000164] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   30.000170] usb 1-1.3: Product: USB HiRes Audio
[   30.264905] usb 1-1.3: USB disconnect, device number 27
[   30.487225] usb 1-1.3: new high-speed USB device number 28 using xhci_hcd
[   31.479219] usb 1-1.3: new high-speed USB device number 29 using xhci_hcd
[   32.184031] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   32.184038] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   32.184044] usb 1-1.3: Product: USB HiRes Audio
[   32.825373] usb 1-1.3: USB disconnect, device number 29
[   33.047225] usb 1-1.3: new high-speed USB device number 30 using xhci_hcd
[   33.148063] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[   33.148070] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   33.148076] usb 1-1.3: Product: USB HiRes Audio
[   33.593461] usb 1-1.3: USB disconnect, device number 30 ... etc...