Desktop Video 11.4 not compatible with CentOS 8.1

Looks like Desktop Video 11.4 is not compatible with CentOS 8.1, and it's specifically because of the 4.18.0-147.3.1.el8_1.x86_64 kernel.

Initially I thought the issue was because of a messy upgrade from 8.0 to 8.1, because it had somehow disabled the NVIDIA driver 440.44, but after reinstalling the NVIDIA driver OK, I saw that the Desktop Video driver wasn't installed anymore. I tried to merely reinstall it, to no avail.

I tried to poke around in the DKMS tree for a bit, and didn't see any obvious issues.

I went ahead and did a totally fresh install of CentOS 8.1, but still couldn't get Desktop Video installed.

Specifically, I ran:

Code: Select all

# rpm -ivh desktopvideo-11.4a14.x86_64.rpm

and then I saw the following errors:

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# rpm -ivh desktopvideo-11.4a14.x86_64.rpm
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:desktopvideo-11.4-a14            ################################# [100%]
Preparing new blackmagic driver for 4.18.0-147.3.1.el8_1.x86_64 kernel...
  Adding to DKMS
  Building (failed)
Preparing new blackmagic-io driver for 4.18.0-147.3.1.el8_1.x86_64 kernel...
  Adding to DKMS
  Building (failed)
Loading modules...
Enabling systemd services...
  DesktopVideoHelper
Starting systemd services...
  DesktopVideoHelper

********************************************************************************
Failed to build driver(s)

Possible causes:
 1. Driver is incompatible with your kernel version
 2. Kernel headers/gcc/make/etc. is not installed
 3. Kernel header version does not match the running kernel (4.18.0-147.3.1.el8_1.x86_64)

Error messages:
dkms build -m blackmagic -v 11.4a14 --rpm_safe_upgrade
---

Kernel preparation unnecessary for this kernel.  Skipping...

Building module:
cleaning build area....
make -j24 KERNELRELEASE=4.18.0-147.3.1.el8_1.x86_64 KERNELRELEASE=4.18.0-147.3.1.el8_1.x86_64....(bad exit status: 2)
Error! Bad return status for module build on kernel: 4.18.0-147.3.1.el8_1.x86_64 (x86_64)
Consult /var/lib/dkms/blackmagic/11.4a14/build/make.log for more information.

dkms build -m blackmagic-io -v 11.4a14 --rpm_safe_upgrade
---

Kernel preparation unnecessary for this kernel.  Skipping...

Building module:
cleaning build area....
make -j24 KERNELRELEASE=4.18.0-147.3.1.el8_1.x86_64 KERNELRELEASE=4.18.0-147.3.1.el8_1.x86_64....(bad exit status: 2)
Error! Bad return status for module build on kernel: 4.18.0-147.3.1.el8_1.x86_64 (x86_64)
Consult /var/lib/dkms/blackmagic-io/11.4a14/build/make.log for more information.

********************************************************************************

So I checked /var/lib/dkms/blackmagic/11.4a14/build/make.log:

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$ tail -n 50 /var/lib/dkms/blackmagic/11.4a14/build/make.log
DKMS make.log for blackmagic-11.4a14 for kernel 4.18.0-147.3.1.el8_1.x86_64 (x86_64)
Fri Jan 17 23:06:50 EST 2020
make -C /lib/modules/4.18.0-147.3.1.el8_1.x86_64/build M=/var/lib/dkms/blackmagic/11.4a14/build
make[1]: Entering directory '/usr/src/kernels/4.18.0-147.3.1.el8_1.x86_64'
  CC [M]  /var/lib/dkms/blackmagic/11.4a14/build/blackmagic_serial.o
  CC [M]  /var/lib/dkms/blackmagic/11.4a14/build/blackmagic_core.o
  CC [M]  /var/lib/dkms/blackmagic/11.4a14/build/blackmagic_lib.o
  CC [M]  /var/lib/dkms/blackmagic/11.4a14/build/blackmagic_dma.o
  SHIPPED /var/lib/dkms/blackmagic/11.4a14/build/bmd-support.o
  CC [M]  /var/lib/dkms/blackmagic/11.4a14/build/blackmagic_gate.o
/var/lib/dkms/blackmagic/11.4a14/build/blackmagic_lib.c: In function ‘dl_access_ok’:
/var/lib/dkms/blackmagic/11.4a14/build/blackmagic_lib.c:628:35: error: macro "access_ok" passed 3 arguments, but takes just 2
  return access_ok(type, addr, size);
                                   ^
/var/lib/dkms/blackmagic/11.4a14/build/blackmagic_lib.c:628:9: error: ‘access_ok’ undeclared (first use in this function); did you mean ‘dl_access_ok’?
  return access_ok(type, addr, size);
         ^~~~~~~~~
         dl_access_ok
/var/lib/dkms/blackmagic/11.4a14/build/blackmagic_lib.c:628:9: note: each undeclared identifier is reported only once for each function it appears in
/var/lib/dkms/blackmagic/11.4a14/build/blackmagic_lib.c:630:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
make[2]: *** [scripts/Makefile.build:313: /var/lib/dkms/blackmagic/11.4a14/build/blackmagic_lib.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [Makefile:1547: _module_/var/lib/dkms/blackmagic/11.4a14/build] Error 2
make[1]: Leaving directory '/usr/src/kernels/4.18.0-147.3.1.el8_1.x86_64'
make: *** [Makefile:43: all] Error 2

I also checked /var/lib/dkms/blackmagic-io/11.4a14/build/make.log:

Code: Select all

$ tail -n 50 /var/lib/dkms/blackmagic-io/11.4a14/build/make.log
DKMS make.log for blackmagic-io-11.4a14 for kernel 4.18.0-147.3.1.el8_1.x86_64 (x86_64)
Fri Jan 17 23:06:56 EST 2020
make -C /lib/modules/4.18.0-147.3.1.el8_1.x86_64/build M=/var/lib/dkms/blackmagic-io/11.4a14/build
make[1]: Entering directory '/usr/src/kernels/4.18.0-147.3.1.el8_1.x86_64'
  CC [M]  /var/lib/dkms/blackmagic-io/11.4a14/build/bmio_client.o
  CC [M]  /var/lib/dkms/blackmagic-io/11.4a14/build/bmio_dev.o
  CC [M]  /var/lib/dkms/blackmagic-io/11.4a14/build/bmio_device.o
  CC [M]  /var/lib/dkms/blackmagic-io/11.4a14/build/bmio_driver.o
  CC [M]  /var/lib/dkms/blackmagic-io/11.4a14/build/bmio_serial.o
  CC [M]  /var/lib/dkms/blackmagic-io/11.4a14/build/bmio_export.o
  CC [M]  /var/lib/dkms/blackmagic-io/11.4a14/build/bmio_pci_ids.o
  CC [M]  /var/lib/dkms/blackmagic-io/11.4a14/build/bm_locks.o
  CC [M]  /var/lib/dkms/blackmagic-io/11.4a14/build/bm_mm.o
  CC [M]  /var/lib/dkms/blackmagic-io/11.4a14/build/bm_pci.o
  SHIPPED /var/lib/dkms/blackmagic-io/11.4a14/build/blackmagic.o
  CC [M]  /var/lib/dkms/blackmagic-io/11.4a14/build/bm_util.o
  CC [M]  /var/lib/dkms/blackmagic-io/11.4a14/build/bmio_audio.o
/var/lib/dkms/blackmagic-io/11.4a14/build/bmio_serial.c: In function ‘bmio_serial_remove’:
/var/lib/dkms/blackmagic-io/11.4a14/build/bmio_serial.c:267:2: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
  struct tty_struct *tty = tty_port_tty_get(&serial->port);
  ^~~~~~
/var/lib/dkms/blackmagic-io/11.4a14/build/bm_util.c: In function ‘bm_access_ok’:
/var/lib/dkms/blackmagic-io/11.4a14/build/bm_util.c:833:35: error: macro "access_ok" passed 3 arguments, but takes just 2
  return access_ok(type, addr, size);
                                   ^
/var/lib/dkms/blackmagic-io/11.4a14/build/bm_util.c:833:9: error: ‘access_ok’ undeclared (first use in this function); did you mean ‘bm_access_ok’?
  return access_ok(type, addr, size);
         ^~~~~~~~~
         bm_access_ok
/var/lib/dkms/blackmagic-io/11.4a14/build/bm_util.c:833:9: note: each undeclared identifier is reported only once for each function it appears in
/var/lib/dkms/blackmagic-io/11.4a14/build/bm_util.c:835:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
make[2]: *** [scripts/Makefile.build:312: /var/lib/dkms/blackmagic-io/11.4a14/build/bm_util.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [Makefile:1547: _module_/var/lib/dkms/blackmagic-io/11.4a14/build] Error 2
make[1]: Leaving directory '/usr/src/kernels/4.18.0-147.3.1.el8_1.x86_64'
make: *** [Makefile:46: all] Error 2

It's not surprising to me that I ran into some compatibility issues, given that Blackmagic Design is still only testing on their build of CentOS 7.3, but I had had my hopes up since everything had actually worked OK on CentOS 8.0. Hopefully the next release of Desktop Video will work!

#!/bin/sh

# usage:
# save this shell file and decklink desktop video driver file in the same folder,such as /tmp/patch
# login as root
# change work dir: cd /tmp/pach
# run the shell file
# get the patched driver file in the same folder with "patched" prefix
# for desktopvideo driver 11.1.0 only





BASE_FOLDER=/tmp/bmd_rpms




WORK_DIR=`pwd`

clear
rm -rf patched_*.rpm >/dev/null 2>&1

DRIVER_RPM_FILE=`find *.rpm 2>/dev/null `
if [ X${DRIVER_RPM_FILE} = "X" ];then
echo -e "\n\n\n rpm driver file not found in the current folder!\n\n"
exit
fi



if [ -d ${BASE_FOLDER} ];then
rm -rf ${BASE_FOLDER} >/dev/null 2>&1
fi

yum install -y rpm-build wget epel-release

yum install -y "kernel-devel-uname-r == $(uname -r)"

#uniustall previous decklink drivers
RESULT=`rpm -qa | grep -i desktopvideo`
if [ "${RESULT}" ];then
yum remove dkms -y
fi

#install DKMS
RESULT=`rpm -qa | grep -i dkms`
if [ X${RESULT} = "X" ];then
yum install dkms -y
fi

#reinstall decklink drivers
yum install -y ${DRIVER_RPM_FILE}
PKG_NAME=`rpm -qa | grep desktopvideo`


echo "%_topdir ${BASE_FOLDER}" >~/.rpmmacros
mkdir -p ${BASE_FOLDER}
mkdir -p ${BASE_FOLDER}/BUILDROOT
mkdir -p ${BASE_FOLDER}/BUILDROOT/${PKG_NAME}
mkdir -p ${BASE_FOLDER}/SPECS
mkdir -p ${BASE_FOLDER}/APPS


#download rpmrebuild
cd ${BASE_FOLDER}
wget -P ${BASE_FOLDER} https://excellmedia.dl.sourceforge.net/ ... .12.tar.gz

if [ $? -eq 0 ];then
tar -xvf ${BASE_FOLDER}/rpmrebuild-2.12.tar.gz -C ${BASE_FOLDER}/APPS
else
echo -e "\n\n\n\n\t Download rpmrebuild error!!!\n\n\n\n"
exit
fi



${BASE_FOLDER}/APPS/rpmrebuild.sh -s ${BASE_FOLDER}/SPECS/$PKG_NAME.spec $PKG_NAME
rpm2cpio ${WORK_DIR}/${DRIVER_RPM_FILE} |cpio -idv -D ${BASE_FOLDER}/BUILDROOT/${PKG_NAME}


#patch source code
C_FILE=`find ${BASE_FOLDER} -name blackmagic_lib.c`
sed -i "s/access_ok(type, addr, size)/access_ok(addr, size)/g" ${C_FILE}
C_FILE=`find ${BASE_FOLDER} -name bm_util.c`
sed -i "s/access_ok(type, addr, size)/access_ok(addr, size)/g" ${C_FILE}

#rebuild rpm files
rpmbuild -ba ${BASE_FOLDER}/SPECS/$PKG_NAME.spec

#copy builded rpm file
if [ -f ${BASE_FOLDER}/RPMS/x86_64/*.rpm ];then
cp ${BASE_FOLDER}/RPMS/x86_64/*.rpm ${WORK_DIR}/patched_${DRIVER_RPM_FILE}
fi

#remove temp files
cd ${WORK_DIR}
if [ -d ${BASE_FOLDER} ];then
rm -rf ${BASE_FOLDER}
fi

#remove decklink drivers
yum remove dkms -y

#reinstall decklink drivers
yum install dkms -y

if [ -f ${WORK_DIR}/patched_${DRIVER_RPM_FILE} ];then
yum install -y ${WORK_DIR}/patched_${DRIVER_RPM_FILE}
fi


echo -e "\n\n\n\t\tsucceeded!\n\n\n"

succeed with desktop driver version 11.1.0 and failed with 11.4.0,I will check it later

The Desktop Video 11.5 was just out.

I tried to install that with command line as instructed in the readme file,

i.e. sudo dnf/yum --nogpgcheck install ...

the message "fail to build drivers" still came out.

But this time, there was one more message to "Reboot required to reload driver"

I reboot the computer anyway, starting in graphical.target which was set as default.

After reboot, the Desktop Video Software Updater launched automatically and update (driver/firmware?) not sure.

Anyway, after that, I reboot again (not sure if it's neccessary) and the decklink card was successfully installed and could be used in Da Vinci Resolve Studio 16.

Hope it helps.

Screenshot1.png (274.15 KiB) Viewed 2573 times

Screenshot2

Screenshot2.png (70.14 KiB) Viewed 2573 times

Screenshot3

Screenshot3.png (65.45 KiB) Viewed 2573 times

Have any brave souls tested Desktop Video 11.5 with CentOS 8.1 yet? The README still says that they've only tested it with CentOS 6 and 7.

Same problem here.

EDIT1: Working with 11.5!

Same problem here.

EDIT1: Working with 11.5!

Hey Lucius, that's great!
Can you please tell how you achieved it?
Did it worked after normal installation or required some fuss?

Same problem here.

EDIT1: Working with 11.5!

Hey Lucius, that's great!
Can you please tell how you achieved it?
Did it worked after normal installation or required some fuss?

Nothing special. Normal installation.

I can somewhat confirm this.
I get an image over SDI.
Cannot say anything useful yet about stability/quality.

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[root@vm-davinci-c8 x86_64]# rpm -ivh desktopvideo-11.5a34.x86_64.rpm
Verifying...                          ################################# [100%]
Vorbereiten …                       ################################# [100%]
Aktualisierung/ Installation …
   1:desktopvideo-11.5-a34            ################################# [100%]
Preparing new blackmagic driver for 4.18.0-147.5.1.el8_1.x86_64 kernel...
  Adding to DKMS
  Building (failed)
Preparing new blackmagic-io driver for 4.18.0-147.5.1.el8_1.x86_64 kernel...
  Adding to DKMS
  Building
  Installing
Loading modules...
  blackmagic_io (failed)
Enabling systemd services...
  DesktopVideoHelper
Starting systemd services...
  DesktopVideoHelper

********************************************************************************
Failed to build driver(s)

Possible causes:
 1. Driver is incompatible with your kernel version
 2. Kernel headers/gcc/make/etc. is not installed
 3. Kernel header version does not match the running kernel (4.18.0-147.5.1.el8_1.x86_64)

Error messages:
dkms build -m blackmagic -v 11.5a34 --rpm_safe_upgrade
---

Kernel preparation unnecessary for this kernel.  Skipping...

Building module:
cleaning build area....
make -j24 KERNELRELEASE=4.18.0-147.5.1.el8_1.x86_64 KERNELRELEASE=4.18.0-147.5.1.el8_1.x86_64....(bad exit status: 2)
Error! Bad return status for module build on kernel: 4.18.0-147.5.1.el8_1.x86_64 (x86_64)
Consult /var/lib/dkms/blackmagic/11.5a34/build/make.log for more information.

********************************************************************************

********************************************************************************
Reboot required to reload driver!

The driver failed to load. The most likely cause is that the driver is
in use. Please try rebooting to load the new driver
********************************************************************************


and after reboot:

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0a:00.0 Multimedia video controller [0400]: Blackmagic Design DeckLink 8K Pro [bdbd:a14b]
   Subsystem: Blackmagic Design DeckLink 8K Pro [bdbd:a14b]
   Kernel driver in use: blackmagic-io
   Kernel modules: blackmagic_io