@richy80, Please read this thread: https://mailman.alsa-project.org/pipermail /alsa-devel/2019-November/158336.html
It is a problem in the radeon or nouveau driver, and will be fixed by audio-component support in the radeon and nouveau driver. And audio maintainer wants some debug info, because I don't have machines which can reproduce your problem, could you please provide or reply that email. thx. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1827967 Title: There are 4 HDMI/Displayport audio output listed in sound setting without attach any HDMI/DP monitor To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1827967/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs