should be obsolete for kernels >=5.4 as the HDA device is enabled per pci quirk. If not, use as a make-shift and report a bug to kernel bugzilla
Linux kernel module to turn on/off Nvidia HD audio device on notebooks. Blatantly copied from Lekensteyn's bbswitch module.
# make
# sudo make install
# sudo make -f Makefile.dkms
# sudo make uninstall
or
# sudo make -f Makefile.dkms uninstall
Since its logic is copied from the bbswitch module, it works like that.
# sudo modprobe nvhda
# cat /proc/acpi/nvhda
# sudo tee /proc/acpi/nvhda <<<ON
# sudo tee /proc/acpi/nvhda <<<OFF
Check dmesg for messages.
See: