GNU/Linux on Thinkpad X250 X260 X270 X280 T470s T460s T450s: no audio output on HDMI with ALSA and PULSEAUDIO | baumi's blog
Fri Feb 5 16:29:46 2021 - permalink - - https://blog.b-nm.at/2017/08/09/elementary-os-on-thinkpad-no-audio-on-hdmi-output/