Arch Linux User Repository

I finally had time to investigate the issue. It looks like that as of 11.5, the DesktopVideoHelper.service has to be running for the capture card to work properly.

modprobe returning 0 and displaying nothing is the sign it loaded the module correctly.

If modules are correctly loaded then launch BlackmagicDesktopVideoSetup and should list your card. Otherwise reboot to make sure everything get loaded correctly and try BlackmagicDesktopVideoSetup again.

sorry, you're right I had mis-typed it, I was just editing my last comment when you replied.

sudo modprobe blackmagic and sudo modprobe blackmagic-io both return empty

but modinfo sees both blackmagic and blackmagic-io as installed, not sure what to try next

have to run to a meeting, but hoping to get this working! maybe I will try reseating the pci board.

Hmm, if dkms reports blackmagic and blackmagic-io as installed then you should be able to load them (and they should load automatically at boot). You don't have anything to copy, dkms handles that for you.

Just to be sure, are you typing the exact command in your previous message or are you typing sudo modprobe blackmagic and sudo modprobe blackmagic-io ? Modprobe expects a single module name so you cannot load both modules like that in a single command.

ok, I see that it's there in /lib/modules/5.10.7-arch1-1/kernel/drivers hmm

sudo modprobe blackmagic and sudo modprobe blackmagic-io both return empty

but modinfo sees both blackmagic and blackmagic-io as installed, not sure what to try next

@goldensuneur, thanks! that got me a bit further, after installing the headers sudo dkms status is the same as yours (minus the -lts)

but still the having same issue with the device not being found.

following the Blackmagic Desktop Video Linux tests in the readme, I'm seeing:

$ sudo modprobe blackmagic[-io]
modprobe: FATAL: Module blackmagic[-io] not found in directory /lib/modules/5.10.7-arch1-1

do I need to install the module into this folder this somehow?

I'm new to dealing with installing driver modules on linux, sorry if this is basic stuff, I'll start reading about modprobe --

thanks for your help!

Hi, I suspect that you don't have kernel headers installed.

Does the output of sudo dkms status looks similar than this :

$ sudo dkms status
blackmagic, 11.7a12, 5.10.7-arch1-1, x86_64: installed
blackmagic, 11.7a12, 5.4.89-1-lts, x86_64: installed
blackmagic-io, 11.7a12, 5.10.7-arch1-1, x86_64: installed
blackmagic-io, 11.7a12, 5.4.89-1-lts, x86_64: installed

It will list all dkms kernel modules and their state. Here you can see that blackmagic and blackmagic-io modules are correctly installed for kernels 5.4 and 5.10.

If you don't have kernel headers installed dkms will not compile nor install the module. The package is named after the kernel you use with -headers at the end (linux-headers, linux-lts-headers, ...). Try installing it and check if the modules are correctly built/installed (you may need to reinstall your kernel package to trigger dkms rebuild).

hello! new arch user here, thanks for your work on this. I'm trying to get the DeckLink Duo 2 driver working on kernal 5.10.7, but so far I'm getting No Blackmagic Design devices were found. when I try to run any of the test programs.

I've enabled the DesktopVideoHelper.service, which is listed active and running.

lspci | grep Blackmagic outputs: 24:00.0 Multimedia video controller: Blackmagic Design DeckLink Duo 2

but lsmod | grep blackmagic comes back empty

is there a step that I'm missing?

In case someone is wondering why their decklink device doesn't work (green screen) with the current obs-studio 26.1.0 from the repo, there is some bug that is now fixed in 26.1.1: https://github.com/obsproject/obs-studio/releases/tag/26.1.1

For some reason this isn't updated for days in the repo. Building obs from PKGBUILD with adapted version string and md5sums worked for me.

My intensity card died and I replaced it with a Magewell one. So as of this release I cannot test if new version work on actual hardware.

My intensity pro card is dying. I won't replace it with another Blackmagic product. So I won't actively use the package anymore.

I can continue to update this package. However, if newer kernels break the driver I won't be able to test the patches I provide on actual hardware.

So, if anyone is interested in becoming maintainer for this package let me know.