Firewire Thunderbolt device connection stopped working April 2022

Question

We use cameras attached to computers to collect images using downloaded software. The cameras have a IEEE 1394b 9pin Firewire port on the back, but we've been able to use a Thunderbolt 3 to Thunderbolt 2 adapter and a Thunderbolt 2 to Firewire adapter to connect the camera to a Thunderbolt and Thunderbolt enabled USB-C port on computers. We used the setup 4/1/2022 to take images and have not used it since 4/27/2022, which is when we noticed the issue. When the device is plugged in, we get the message "Thunderbolt device functionality might be limited". I tried following older threads to get the legacy drivers reinstalled, but the issue has impacted all of our computers/laptops that used to function, and installing the firewire drivers, thunderbolt controllers, and resetting the start value in regedit has not helped. In device manager, I can see the Thunderbolt 3 to Thunderbolt 2 adapter, but the IEEE 1394 bus does not open. If anyone can help try to get the connection back, please let me know.

P.S.- We are running Dell Optiplex Towers and Latitude Laptops. Also, we are using Windows 10 Enterprise, version 21H2, pack 120.2212.4170.0

Answer 1

Hello

Thank you for your question and reaching out.
I can understand you are having some issues related to Cameras connected using Thunderbolt .

Windows system what you want to do is make sure that the cable that you’ve bought with your product is the same cable that came with your dock or peripheral you’re trying to connect. Plugable cables have a label on them that let you know which product the cable goes with.

I will also suggest you have look on below Microsoft guide for potential cause and solutions for this issue.

https://support.microsoft.com/en-us/windows/fix-usb-c-problems-in-windows-f4e0e529-74f5-cdae-3194-43743f30eed2#bkmk_improveconnection

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