I followed the guide from that post but it seems nvidia audio can not be turned on no matter what.
snd_hda_intel 0000:01:00.1: can’t change power state from D3cold to D0 (config space inaccessible)
snd_hda_intel 0000:01:00.1: can’t change power state from D3hot to D0 (config space inaccessible)
01:00.1 Audio device: NVIDIA Corporation GK107 HDMI Audio Controller (rev ff) (prog-if ff)
!!! Unknown header type 7f
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
I have dual boot with Windows 10, I checked in Windows and that audio device is not present either. But then again, HDMI output I have comes from integrated graphics, not nvidia. So 740M card doesn’t have any outputs. My guess is that audio device is disabled by manufacturer’s (ASUS) design. Windows 10 comes from stand by mode just fine, maybe nvidia driver tries to power audio unconditionally.
I’ll try to remove those udev rules completely.
UPDATE: Nope, that didn’t help