Thanks. That EDID seems to mention stereo audio support. So that's good.
But also I wonder if the DRM property needs tweaking. Please try running
this command:
xrandr --output HDMI-1 --set audio on
If it still doesn't work then try logging in again after that.
------------------------
Full EDID data:
EDID version: 1.3
Manufacturer: HXA Model 0 Serial Number 1
Made in week 38 of 2006
Digital display
Maximum image size: 71 cm x 40 cm
Gamma: 2.50
RGB color display
First detailed timing is preferred timing
Color Characteristics
Red: 0.6396, 0.3447
Green: 0.2910, 0.6347
Blue: 0.1630, 0.0927
White: 0.2880, 0.2958
Established Timings I & II: none
Standard Timings: none
Detailed mode: Clock 148.500 MHz, 708 mm x 398 mm
1920 2008 2052 2200 ( 88 44 148)
1080 1084 1089 1125 ( 4 5 36)
+hsync +vsync
VertFreq: 60.000 Hz, HorFreq: 67.500 kHz
Detailed mode: Clock 148.500 MHz, 708 mm x 398 mm
1920 2008 2052 2640 ( 88 44 588)
1080 1084 1089 1125 ( 4 5 36)
+hsync +vsync
VertFreq: 50.000 Hz, HorFreq: 56.250 kHz
Display Product Name: BMD HDMI
Display Range Limits
Monitor ranges (GTF): 50-60 Hz V, 31-68 kHz H, max dotclock 80 MHz
Has 1 extension block
Checksum: 0xf7
----------------
CTA-861 Extension Block Revision 3
Basic audio support
Supports YCbCr 4:2:2
4 native detailed modes
27 bytes of CTA data blocks
Video Data Block
1920x1080i 60.000 Hz 16:9 33.750 kHz 74.250 MHz (VIC 5, native)
1280x720 60.000 Hz 16:9 45.000 kHz 74.250 MHz (VIC 4, native)
1920x1080i 50.000 Hz 16:9 28.125 kHz 74.250 MHz (VIC 20, native)
1280x720 50.000 Hz 16:9 37.500 kHz 74.250 MHz (VIC 19, native)
1920x1080 24.000 Hz 16:9 27.000 kHz 74.250 MHz (VIC 32, native)
1920x1080 25.000 Hz 16:9 28.125 kHz 74.250 MHz (VIC 33, native)
1920x1080 30.000 Hz 16:9 33.750 kHz 74.250 MHz (VIC 34, native)
1920x1080 50.000 Hz 16:9 56.250 kHz 148.500 MHz (VIC 31, native)
1920x1080 60.000 Hz 16:9 67.500 kHz 148.500 MHz (VIC 16, native)
Audio Data Block
Linear PCM, max channels 2
Supported sample rates (kHz): 48
Supported sample sizes (bits): 24 20 16
Speaker Allocation Data Block
Speaker map:
FL/FR - Front Left/Right
Vendor-Specific Data Block, OUI 0x000c03 (HDMI)
Source physical address 3.0.0.0
Maximum TMDS clock: 150 MHz
Detailed mode: Clock 74.250 MHz, 708 mm x 398 mm
1280 1390 1430 1650 (110 40 220)
720 725 730 750 ( 5 5 20)
+hsync +vsync
VertFreq: 60.000 Hz, HorFreq: 45.000 kHz
Detailed mode: Clock 74.250 MHz, 708 mm x 398 mm
1280 1720 1760 1980 (440 40 220)
720 725 730 750 ( 5 5 20)
+hsync +vsync
VertFreq: 50.000 Hz, HorFreq: 37.500 kHz
Checksum: 0xd2
** Package changed: ubuntu => pulseaudio (Ubuntu)
** Summary changed:
- incorrect audio-EDID on HDMI, blocking audio transmission over HDMI
+ HDMI audio not working on Blackmagic Design ATEM Mini Pro ISO (video mixer)
--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to pulseaudio in Ubuntu.
https://bugs.launchpad.net/bugs/1910537
Title:
HDMI audio not working on Blackmagic Design ATEM Mini Pro ISO (video
mixer)
Status in pulseaudio package in Ubuntu:
Incomplete
Bug description:
This is a complicated thing. I have a very specific problem with audio
output on HDMI.
I want to use an older notebook with Lubuntu 20.04 as a video source
for libreoffice slides, videos etc. to feed them over HDMI into a
Blackmagic Design ATEM Mini Pro ISO (video mixer) as one input.
Configured on the desktop just like a second screen or beamer.
Video works well and rock-stable, no problem at all.
But not audio.
Although I carefully configured audio with pavucontrol to be directed
to the HDMI output, the ATEM switcher does not recognize it as an
audio source (like when connecting a digital camera) and does not
receive or indicate any audio input.
Note:
But when I use the very same computer, same HDMI cable, same video
with a cheap chinese portable LCD screen with speakers (i.e. pull the
cable from the ATEM and plug it into the screen) it immediately starts
playing both video and audio. So there is evidence that the ubuntu
notebook definitely passes it's sound to HDMI and there's really an
audio signal on the HDMI.
I've opened a bug at Blackmagic Design, and got their reply that they
can't help and have never heard of such a problem before. Their guess
is that the linux notebook is not setting EDID configuration correctly
and thus not recognized by the ATEM, while the cheap LCD screen
propably does not care about EDID and just plays everything, therefore
a wrong EDID information would not matter.
Although I have decades of experience with Linux, I am not too
familiar with details of HDMI and the internals of the X11 driver, so
I'm not sure where to start debugging, not even, whether this is a
problem of Xorg/X11 or pulseaudio.
I've checked this with another notebook with much more recent (intel)
hardware, which offers dozens of HDMI audio options in the pavucontrol
selection menu, but same problem: Video works, but the ATEM does not
recognize it as a audio source.
Blackmagic Design (they're good in Windows and MacOS, but not Linux)
recommended to use an edid manager, whatever this means.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-58.64-generic 5.4.73
Uname: Linux 5.4.0-58-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: LXQt
Date: Thu Jan 7 13:16:26 2021
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
DpkgLog:
ExtraDebuggingInterest: Yes
GraphicsCard:
Intel Corporation 2nd Generation Core Processor Family Integrated Graphics
Controller [8086:0106] (rev 09) (prog-if 00 [VGA controller])
Subsystem: Acer Incorporated [ALI] 2nd Generation Core Processor Family
Integrated Graphics Controller [1025:0742]
InstallationDate: Installed on 2020-05-16 (235 days ago)
InstallationMedia: Lubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
Lsusb:
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 04f2:b336 Chicony Electronics Co., Ltd
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Acer AO756
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-58-generic
root=UUID=a69345e2-b61e-4d25-baab-b23f75273af6 ro quiet
cryptdevice=UUID=d132b97b-f47a-4432-88b5-42aca187b9ff:luks-d132b97b-f47a-4432-88b5-42aca187b9ff
root=/dev/mapper/luks-d132b97b-f47a-4432-88b5-42aca187b9ff
resume=/dev/mapper/luks-d132b97b-f47a-4432-88b5-42aca187b9ff splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/19/2012
dmi.bios.vendor: Acer
dmi.bios.version: V1.05
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: Mimic
dmi.board.vendor: Acer
dmi.board.version: Type2 - Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.05
dmi.modalias:
dmi:bvnAcer:bvrV1.05:bd07/19/2012:svnAcer:pnAO756:pvrV1.05:rvnAcer:rnMimic:rvrType2-BoardVersion:cvnAcer:ct10:cvrV1.05:
dmi.product.family: Type1Family
dmi.product.name: AO756
dmi.product.sku: Type1Sku0
dmi.product.version: V1.05
dmi.sys.vendor: Acer
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.8-0ubuntu1~20.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1
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