Blackmagic Forum

I have an Alienware running Ubuntu (and Red Hat with the same issue)

The Ultrastudio is Authorized and in the ACL

However,
# boltctl list
shows the device as disconnected.

The LED on the device is flashing.

The device and cable work fine with the twin Alienware running Win-11.

Any help is appreciated.

I have tried Desktop Video -
12.4.1
12.4
12.3.1
11.7

Same results.

While Ubuntu recognizes the UltraStudio 3G recorder is connected, the Desktop Video Setup states No Desktop Video Device Detected.

I am having a similar problem with Ubuntu 22.04 and various versions of Desktop Video. In my case, the UltraStudio Monitor 3G is reported by `boltctl list` as authorized and by `tbtadm devices` as authorized (although not in ACL). Yet `DesktopVideoUpdateTool -l` hangs, and the Desktop Video GUI states that no devices are connected. Hopefully someone is able to help!

As suggested by BlackMagic - We have reloaded Ubuntu 22.04 vice 22.10 and followed the steps closely in the readme file.

Still experiencing the same exact issues.

We made one interesting observation. If we leave the recorder plugged into the Thunderbolt port for a while, the flashing LED turns solid. However, the Desktop Video GUI still does not recognize the device.

Update: We remain stuck.

We have been passed to the Blackmagic developer team.

Any thoughts or suggestions are greatly appreciated.

We have heard crickets from the Blackmagic development team

For what it's worth, I've found that once you have updated your Linux kernel to the latest version the Desktop Video drivers don't work. This was with a DeckLink, not UltraStudio. On Fedora Linux 36 that updated itself to a newer kernel.

The only solution I could find was to boot into an older kernel. I don't think Ubuntu updates the kernel beyond the LTS scope, but I don't have enough experience with it to say.

Thank you for your response.

We reverted back in Ubuntu kernels.

We also loaded Red Hat with the same issues.

We are running out of stuff to try.

Thanks. Mike

Maybe too late. But if you used a newer Intel CPU (Alder Lake and later) or AMD's USB4 implementation, then there is a "bug".

The Thunderbolt driver in the Linux kernel does not support similar devices (with rx lanes ==1 and tx lanes == 1). It worked until 11-gen Intel because the connection manager was firmware-based.

Today, Mika, Intel's Thunderbolt developer posted a draft patch to address the issue. And I finally could use UltraStudio 3G devices on our newer computers. You will find this on Kernel bugzilla under id 217737.

I would post link to my kernel build with the patch applied, but I am not allowed to post URLs here anymore