UltraStudio 4k Mini under Ubuntu

Hi all, I'm building out a system that uses the SDK on Ubuntu with an UltraStudio 4k Mini. I have experience working with the SDK under Mac and Windows, but it's my first time on Linux.

I've been able to get the device working on this same hardware under Windows, but under Ubuntu I'm having trouble at the very first step of seeing the device at all. boltctl says it is "disconnected" in spite of being connected:

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~$ sudo dmidecode -t 2
[sudo] password for rzm:
# dmidecode 3.3
Getting SMBIOS data from sysfs.
SMBIOS 3.5.0 present.

Handle 0x0002, DMI type 2, 15 bytes
Base Board Information
        Manufacturer: ASUSTeK COMPUTER INC.
        Product Name: ProArt Z790-CREATOR WIFI
        Version: Rev 1.xx
        Serial Number: 230926177000844
        Asset Tag: Default string
        Features:
                Board is a hosting board
                Board is replaceable
        Location In Chassis: Default string
        Chassis Handle: 0x0003
        Type: Motherboard
        Contained Object Handles: 0

~$ boltctl list
 ○ Blackmagic Design UltraStudio 4K Mini
   ├─ type:          peripheral
   ├─ name:          UltraStudio 4K Mini
   ├─ vendor:        Blackmagic Design
   ├─ uuid:          007088b8-f524-0400-ffff-ffffffffffff
   ├─ generation:    Thunderbolt 3
   ├─ status:        disconnected
   ├─ authorized:    2024年01月05日 11時59分00秒
   ├─ connected:     2024年01月05日 11時59分00秒
   └─ stored:        2024年01月05日 11時46分52秒
      ├─ policy:     iommu
      └─ key:        no

~$ journalctl -u bolt.service | grep -i blackmagic
 1月 05 20:46:52 rzm-4090-1 boltd[1047]: [007088b8-f524-UltraStudio 4K Mini        ] labeling device: Blackmagic Design UltraStudio 4K Mini
~$ journalctl -u bolt.service | grep -i 007088b8
 1月 05 20:46:52 rzm-4090-1 boltd[1047]: [007088b8-f524-UltraStudio 4K Mini        ] device added, status: authorized, at /sys/devices/pci0000:00/0000:00:1c.4/0000:07:00.0/0000:08:00.0/0000:09:00.0/domain0/0-0/0-1
 1月 05 20:46:52 rzm-4090-1 boltd[1047]: [007088b8-f524-UltraStudio 4K Mini        ] labeling device: Blackmagic Design UltraStudio 4K Mini
 1月 05 20:46:52 rzm-4090-1 boltd[1047]: [007088b8-f524-UltraStudio 4K Mini        ] import: iommu mode, boot: yes -> iommu
 1月 05 20:46:52 rzm-4090-1 boltd[1047]: [007088b8-f524                            ] bootacl: policy not 'auto', not adding
 1月 05 20:46:52 rzm-4090-1 boltd[1047]: [007088b8-f524-UltraStudio 4K Mini        ] dbus: exported device at /org/freedesktop/bolt/devices/007088b8_f524...
 1月 05 20:49:31 rzm-4090-1 boltd[1085]: [007088b8-f524                            ] store: loading device
 1月 05 20:49:31 rzm-4090-1 boltd[1085]: [007088b8-f524-UltraStudio 4K Mini        ] dbus: exported device at /org/freedesktop/bolt/devices/007088b8_f524...
 1月 05 20:49:56 rzm-4090-1 boltd[1085]: [007088b8-f524-UltraStudio 4K Mini        ] parent is d9ab8780-0038...
 1月 05 20:49:56 rzm-4090-1 boltd[1085]: [007088b8-f524-UltraStudio 4K Mini        ] connected: authorized (/sys/devices/pci0000:00/0000:00:1c.4/0000:07:00.0/0000:08:00.0/0000:09:00.0/domain0/0-0/0-1)
 1月 05 20:49:56 rzm-4090-1 boltd[1085]: [007088b8-f524-UltraStudio 4K Mini        ] udev: device changed: authorized -> authorized
 1月 05 20:50:40 rzm-4090-1 boltd[1085]: [007088b8-f524-UltraStudio 4K Mini        ] disconnected (/sys/devices/pci0000:00/0000:00:1c.4/0000:07:00.0/0000:08:00.0/0000:09:00.0/domain0/0-0/0-1)
 1月 05 20:53:51 rzm-4090-1 boltd[1032]: [007088b8-f524                            ] store: loading device
 1月 05 20:53:51 rzm-4090-1 boltd[1032]: [007088b8-f524-UltraStudio 4K Mini        ] dbus: exported device at /org/freedesktop/bolt/devices/007088b8_f524...
 1月 05 20:57:58 rzm-4090-1 boltd[1081]: [007088b8-f524                            ] store: loading device
 1月 05 20:57:58 rzm-4090-1 boltd[1081]: [007088b8-f524-UltraStudio 4K Mini        ] dbus: exported device at /org/freedesktop/bolt/devices/007088b8_f524...
 1月 05 20:59:00 rzm-4090-1 boltd[1081]: [007088b8-f524-UltraStudio 4K Mini        ] parent is d9ab8780-0038...
 1月 05 20:59:00 rzm-4090-1 boltd[1081]: [007088b8-f524-UltraStudio 4K Mini        ] connected: authorized (/sys/devices/pci0000:00/0000:00:1c.4/0000:07:00.0/0000:08:00.0/0000:09:00.0/domain0/0-0/0-1)
 1月 05 20:59:00 rzm-4090-1 boltd[1081]: [007088b8-f524-UltraStudio 4K Mini        ] udev: device changed: authorized -> authorized
 1月 05 20:59:15 rzm-4090-1 boltd[1081]: [007088b8-f524-UltraStudio 4K Mini        ] disconnected (/sys/devices/pci0000:00/0000:00:1c.4/0000:07:00.0/0000:08:00.0/0000:09:00.0/domain0/0-0/0-1)
 1月 05 21:03:21 rzm-4090-1 boltd[1028]: [007088b8-f524                            ] store: loading device
 1月 05 21:03:21 rzm-4090-1 boltd[1028]: [007088b8-f524-UltraStudio 4K Mini        ] dbus: exported device at /org/freedesktop/bolt/devices/007088b8_f524...
 1月 05 21:37:25 rzm-4090-1 boltd[1071]: [007088b8-f524                            ] store: loading device
 1月 05 21:37:25 rzm-4090-1 boltd[1071]: [007088b8-f524-UltraStudio 4K Mini        ] dbus: exported device at /org/freedesktop/bolt/devices/007088b8_f524...
 1月 06 14:48:58 rzm-4090-1 boltd[1023]: [007088b8-f524                            ] store: loading device
 1月 06 14:48:58 rzm-4090-1 boltd[1023]: [007088b8-f524-UltraStudio 4K Mini        ] dbus: exported device at /org/freedesktop/bolt/devices/007088b8_f524...


I also have a DeckLink Duo plugged in to a PCI port, and I can see that:

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$ lspci | grep -i blackmagic
71:00.0 Multimedia video controller: Blackmagic Design DeckLink Duo 2


And it is visible under Desktop Video. But the UltraStudio 4K Mini is not visible.

What steps can I take next to solve this? I am working with Ubuntu 22.04.3 LTS, x86_64. Thanks!