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.

You have it if you installed the decklink package. It's located under /usr/lib/systemd/system/DesktopVideoHelper.service.

But this is a .service file for systemd, you have to start/enable the service.

sudo systemctl start DesktopVideoHelper.service
sudo systemctl enable DesktopVideoHelper.service

Since updating to 11.5 my capture card isn't showing up in either the Blackmagic Video Setup Utility or OBS.

I don't seem to have DesktopVideoHelper.service on my system, and I've even tried to reinstall this package just in case I was missing something.

@goldensuneur Yep that fixed it, as soon as I picked my 5.4 headers, it installed and added the dkms module. https://i.imgur.com/WJP40Qh.png

@troyBORG You must install headers for your kernel otherwise dkms cannot build the kernel module. I don't know the mane of the package for Manjaro but on Arch it would be linux-headers or linux-lts-headers.

Is this anything I need to worry about?

(3/6) Install DKMS modules
==> Unable to install module blackmagic-io/11.5a34 for kernel 5.4.23-1-MANJARO: Missing kernel headers.
==> Unable to install module blackmagic/11.5a34 for kernel 5.4.23-1-MANJARO: Missing kernel headers.

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.

You can use the PKGBUILD in this commit (https://aur.archlinux.org/cgit/aur.git/commit/?h=decklink&id=e63fc9d6265e1782d8e661bbc5a3750df5408ccc), it will build the package for version 1.14.1.

About the error you got earlier, it looks like Blackmagicdesign updated the upstream file without notice. I tried this new file but it does not solve our problem of undetected card.

Sorry I don't have much time to investigate now.

How do I get the older version? I'm planning on getting the card soon. Or should I wait for new version before I order the card?

You are right. Mine also shows on lspci with the correct driver but nothing in obs or in the setup.

I'm currently away from my computer so I cannot easily do proper that involve display. I'll do my best but for the moment I recommend not to update and stay on the 1.14.1 version (https://aur.archlinux.org/cgit/aur.git/commit/?h=decklink&id=e63fc9d6265e1782d8e661bbc5a3750df5408ccc)

Did 11.5 break for anyone else? Intensity Pro 4k not showing up in the setup anymore ("No Desktop Video Device Detected"). Device still shows up in lspci and driver still shows up in lsmod. Tested with linux and linux-lts kernels.