InstallationDate: Installed on (235 days ago) Subsystem: Acer Incorporated 2nd Generation Core Processor Family Integrated Graphics Controller Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 ) ProcVersionSign ature: Ubuntu 5.4.0-58.64-generic 5.4.73īootLog: Error: Permission denied: '/var/log/boot.log' 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.īlackmagic Design (they're good in Windows and MacOS, but not Linux) recommended to use an edid manager, whatever this means. 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.Īlthough 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 opened a bug at Blackmagic Design, and got their reply that they can't help and have never heard of such a problem before. 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.
pull the cable from the ATEM and plug it into the screen) it immediately starts playing both video and audio. Video works well and rock-stable, no problem at all.Īlthough 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.īut when I use the very same computer, same HDMI cable, same video with a cheap chinese portable LCD screen with speakers (i.e. Configured on the desktop just like a second screen or beamer.
to feed them over HDMI into a Blackmagic Design ATEM Mini Pro ISO (video mixer) as one input. I want to use an older notebook with Lubuntu 20.04 as a video source for libreoffice slides, videos etc. I have a very specific problem with audio output on HDMI.
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