Arch Linux

defunkt

Member

Registered: 2022-01-19

Posts: 2

PCIe TB Card w/ UAD Apollo x6 audio interface sometimes not recognized

Hello,

I have been struggling to debug an issue with my external audio interface and thunderbolt adapter card. Sometimes it is recognized (in lscpi) and sometimes not, and I am not sure where to go from here.

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Hardware:

- Asus X99 Pro 3.1 motherboard
- Intel 5930k
- IOMMU/VT-d enabled
- Asus Thunderbolt EX3 PCIe adapter card
- Universal Audio Apollo x6 audio interface

Goal: To use my external audio interface with arch.

Initial Problem: There are no Linux drivers for my audio interface.

Workaround: QEMU/Virt-Manager + Windows 10 + native pass-through of the Thunderbolt adapter card and audio interface.

Current Problem: Sometimes my audio interface is recognized by the host (arch) and sometimes it isn't. When it IS recognized, passing it through to the VM works. Sometimes power-cycling/rebooting the PC/audio interface causes it to be recognized; however, I cannot seem to reliably reproduce the issue. Sometimes it takes an hour of messing around before it is recognized.

---

However, I managed to save the output of

sudo lspci -vvv

the last time that it WAS working, and compared it to the same output when it wasn't.

The diff can be found here on Line 1426 (the right side is when it was working): https://pastebin.com/710STdwB

I am not sure where to begin with debugging the issue. Any help would be sincerely appreciated.

Thank you!

---

Extra info:

1/5:

boltctl

 ● Universal Audio, Inc. Thunderbolt 3 Option Card
   ├─ type:          peripheral
   ├─ name:          Thunderbolt 3 Option Card
   ├─ vendor:        Universal Audio, Inc.
   ├─ uuid:          00527008-ddb7-7611-ffff-ffffffffffff
   ├─ generation:    Thunderbolt 3
   ├─ status:        authorized
   │  ├─ domain:     c4010000-0080-7518-23e8-26144a02a921
   │  ├─ rx speed:   20 Gb/s = 2 lanes * 10 Gb/s
   │  ├─ tx speed:   20 Gb/s = 2 lanes * 10 Gb/s
   │  └─ authflags:  none
   ├─ authorized:    Sat 05 Feb 2022 06:15:44 AM
   ├─ connected:     Sat 05 Feb 2022 06:15:44 AM
   └─ stored:        Sat 22 Jan 2022 04:37:57 AM
      ├─ policy:     auto
      └─ key:        no

2/5:

cat /etc/udev/rules.d/99-removable.rules

ACTION=="add", SUBSYSTEM=="thunderbolt", ATTR{authorized}=="0", ATTR{authorized}="1"

3/5:

for iommu_group in $(find /sys/kernel/iommu_groups/ -maxdepth 1 -mindepth 1 -type d);do echo "IOMMU group $(basename "$iommu_group")"; for device in $(\ls -1 "$iommu_group"/devices/); do if [[ -e "$iommu_group"/devices/"$device"/reset ]]; then echo -n "[RESET]"; fi; echo -n $'\t';lspci -nns "$device"; done; done

OUTPUT: https://pastebin.com/fRYF5L1G

4/5:

sudo journalctl -b

part 1 of 2: https://pastebin.com/rtS3vUhb
part 2 of 2: https://pastebin.com/MZvXemzd

5/5

sudo dmesg

https://pastebin.com/gxw4wjyf

Last edited by defunkt (2022-02-05 07:26:17)

defunkt

Member

Registered: 2022-01-19

Posts: 2

Re: PCIe TB Card w/ UAD Apollo x6 audio interface sometimes not recognized

Update: following advice from here (https://bbs.archlinux.org/viewtopic.php?id=253050), I added

pci=realloc,assign-busses,hpbussize=0x33

to my

GRUB_CMDLINE_LINUX_DEFAULT

in

/etc/default/grub

and it seems to work. If I turn off my PC, turn on the interface, and then boot my PC, it's detected.