Blackmagic Forum

Hello, I recently installed the Blackmagic DeckLink Quad HDMI recorder on my PC. I was able to install Desktop Video 14.5 on Windows and 14.4.1 on Linux, following which the device was detected on OBS and could be used as a source.

However, once I rebooted my PC, OBS no longer recognizes the device on Linux. Desktop Video Setup does not detect it either. Here are some commands I ran on the terminal to troubleshoot.

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> lspci | grep Blackmagic
05:00.0 Multimedia video controller: Blackmagic Design DeckLink Quad HDMI Recorder

> lsmod | grep blackmagic
blackmagic_io        2420736  4

> dkms status -m blackmagic-io -k `uname -r`
blackmagic-io/14.4.1a4, 6.14.7-arch2-1, x86_64: installed


The device works fine on Windows. How can I get it to work on Linux too?

You might test if utilities included with Desktop Video 14.4.1 will work with your installed card.

What does dmesg tell you, does it detect the device ? Should be something like this:

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$ dmesg|grep magic
[    6.189014] blackmagic_io: loading out-of-tree module taints kernel.
[    6.189026] blackmagic_io: module license 'Proprietary' taints kernel.
[    6.189778] blackmagic_io: module verification failed: signature and/or required key missing - tainting kernel
[    6.201997] BlackmagicIO: Driver version 14.2.1a1 loading
[    6.204918] blackmagic-io 0000:23:00.0: enabling device (0000 -> 0002)
[    6.221520] BlackmagicIO: Enabled device "Intensity Pro 4K" x4/5 GT/s (c762515,4b2300) FW Date: 08-16 17:41
[    6.231595] BlackmagicIO: Intensity Pro 4K as blackmagic!io0 [0000:23:00.0]
[    6.231600] BlackmagicIO: Initialised serial driver for blackmagic!io0
[    6.232706] blackmagic-io 0000:25:00.0: enabling device (0000 -> 0002)
[    6.248049] BlackmagicIO: Enabled device "DeckLink Mini Monitor HD" x1/5 GT/s (e652c840,612500) FW Date: 05-17 14:45
[    6.249455] BlackmagicIO: DeckLink Mini Monitor HD as blackmagic!io1 [0000:25:00.0]
[    6.249459] BlackmagicIO: Initialised serial driver for blackmagic!io1