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.

Blackmagic Intensity pro 4k is unable to be seen but is visible on windows and DesktopVideoHelper.service is enabled and started

if using thunderbolt blackmagic devices this appears to fail. (with recorder 3g for me, latest linux kernel 5.16.11-arch1-1). Kernel driver chokes and segfaults https://forum.blackmagicdesign.com/viewtopic.php?t=146431&p=805146

I have installed my intensity pro 4K and this package and the desktop video setup cant find my card, despite it being visible in hardware settings. I'm on kernel 5.15.19, has an update broke this since it was last working?

I also think that it is better to introduce as few patches as necessary. For now it is not an issue but I suggest you to inform blackmagic that they should update before it becomes one.

@Ammako dkms.conf is provided by the package, so as long as it still builds it seems like overkill to introduce a patch just to remove it.

REMAKE_INITRD is deprecated and should probably be removed from dkms.conf

It doesn't really cause problems, but it would probably be best practice that way, to get rid of warnings.

Thanks, I pushed a new version with a patch inspired by yours. Let me know if it does not work on kernel 5.15 and newer.

Patch for kernel 5.15, which deprecated alloc_tty_driver and put_tty_driver:

--- package.orig/Blackmagic_Desktop_Video_Linux_12.2/other/x86_64/desktopvideo-12.2a12-x86_64/usr/src/blackmagic-12.2a12/blackmagic_serial.c    2021-11-04 17:18:37.053086911 +0100
+++ package.new/Blackmagic_Desktop_Video_Linux_12.2/other/x86_64/desktopvideo-12.2a12-x86_64/usr/src/blackmagic-12.2a12/blackmagic_serial.c 2021-11-04 17:30:49.791835250 +0100
@@ -613,7 +613,7 @@
    int ret;
    struct tty_driver *driver;

-   driver = alloc_tty_driver(BLACKMAGIC_SERIAL_MINORS);
+   driver = tty_alloc_driver(BLACKMAGIC_SERIAL_MINORS, 0);
    if (!driver)
        return -ENOMEM;

@@ -639,7 +639,7 @@

 abort:
    printk(KERN_ERR "failed to register blackmagic serial driver");
-   put_tty_driver(driver);
+   tty_driver_kref_put(driver);
    return ret;
 }

@@ -648,6 +648,6 @@
    if (blackmagic_tty_driver)
    {
        tty_unregister_driver(blackmagic_tty_driver);
-       put_tty_driver(blackmagic_tty_driver);
+       tty_driver_kref_put(blackmagic_tty_driver);
    }
 }
diff --unified --recursive --text --color package.orig/Blackmagic_Desktop_Video_Linux_12.2/other/x86_64/desktopvideo-12.2a12-x86_64/usr/src/blackmagic-io-12.2a12/bmio_serial.c package.new/Blackmagic_Desktop_Video_Linux_12.2/other/x86_64/desktopvideo-12.2a12-x86_64/usr/src/blackmagic-io-12.2a12/bmio_serial.c
--- package.orig/Blackmagic_Desktop_Video_Linux_12.2/other/x86_64/desktopvideo-12.2a12-x86_64/usr/src/blackmagic-io-12.2a12/bmio_serial.c   2021-11-04 17:18:37.053086911 +0100
+++ package.new/Blackmagic_Desktop_Video_Linux_12.2/other/x86_64/desktopvideo-12.2a12-x86_64/usr/src/blackmagic-io-12.2a12/bmio_serial.c    2021-11-04 17:29:38.749443820 +0100
@@ -304,7 +304,7 @@
 {
    int ret;

-   struct tty_driver* serial = alloc_tty_driver(MAX_SERIAL_LINES);
+   struct tty_driver* serial = tty_alloc_driver(MAX_SERIAL_LINES, 0);
    if (!serial)
        return -ENOMEM;

@@ -324,7 +324,7 @@
    ret = tty_register_driver(serial);
    if (ret)
    {
-       put_tty_driver(serial);
+       tty_driver_kref_put(serial);
        return ret;
    }

@@ -340,7 +340,7 @@
    if (serial_driver)
    {
        tty_unregister_driver(serial_driver);
-       put_tty_driver(serial_driver);
+       tty_driver_kref_put(serial_driver);
        serial_driver = NULL;
    }
 }

awesome, also working here on 5.14.3-arch1-1 -- happy to be able to update the system, was holding off until now since I rely on the decklink drivers, using it everyday -- thanks for the package update! FWIW it did require a reboot for the device to be found by BlackmagicDesktopVideoSetup.

Can confirm it works for me too with 5.14.2.arch1-2. Thanks for updating the PKGBUILD.

EDIT: Though, the audio stutters quite badly. I'll have to see if I can get that fixed...

EDIT2: happens on Windows too, I think it may have to do with PCI bandwidth available. I get a warning about dropped frames when I record with MediaExpress. But there's not as many dropped frames when I record a 720p60 signal vs 1080p60.

EDIT3: yeah that was it. Unplugging the TV tuner card I never use gave me the PCI bandwidth the card needs to work properly.