No sound card detected on DisplayPort with Quadro NVS 4200M 375.* on Ubuntu

Dear adventure fellows,

I get image on my TV when connected via DisplayPort but no sound.

Digging out in the forum I saw similar topics but in all of them the card was at least detected. This is not my case. See the following:

$ cat /proc/asound/cards 
 0 [PCH            ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xf3920000 irq 29
$ sudo  lspci -H1 | grep 01:00
01:00.0 VGA compatible controller: NVIDIA Corporation GF119M [Quadro NVS 4200M] (rev a1)

After going to sleep mode and waking the computer up again, I get:

$ sudo  lspci -H1 | grep 01:00
01:00.0 VGA compatible controller: NVIDIA Corporation GF119M [Quadro NVS 4200M] (rev a1)
01:00.1 Audio device: NVIDIA Corporation GF119 HDMI Audio Controller (rev a1)

But /proc/asound/cards remains the same as before, here other commands:

$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: CX20590 Analog [CX20590 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
$ sudo lshw -c display,sound
  *-display               
       description: VGA compatible controller
       product: GF119M [Quadro NVS 4200M]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
       configuration: driver=nvidia latency=0
       resources: irq:31 memory:f0000000-f0ffffff memory:c0000000-cfffffff memory:d0000000-d1ffffff ioport:5000(size=128) memory:f1000000-f107ffff
  *-display
       description: VGA compatible controller
       product: 2nd Generation Core Processor Family Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 09
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:27 memory:f1400000-f17fffff memory:e0000000-efffffff ioport:6000(size=64)
  *-usb:1
       description: Video
       product: Integrated Camera
       vendor: Chicony Electronics Co., Ltd.
       physical id: 6
       bus info: usb@1:1.6
       version: 7.52
       capabilities: usb-2.00
       configuration: driver=uvcvideo maxpower=200mA speed=480Mbit/s
  *-multimedia
       description: Audio device
       product: 6 Series/C200 Series Chipset Family High Definition Audio Controller
       vendor: Intel Corporation
       physical id: 1b
       bus info: pci@0000:00:1b.0
       version: 04
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list
       configuration: driver=snd_hda_intel latency=0
       resources: irq:28 memory:f3920000-f3923fff

I attach the nvidia-bug-report.log.gz.

I tried already with several versions of the 375.* driver with no success.

Any ideas?

Thanks in advance,

brj
nvidia-bug-report.log.gz (87.8 KB)

Does anyone have any ideas on how to face this issue?

See this:
https://devtalk.nvidia.com/default/topic/1024022/linux/gtx-1060-no-audio-over-hdmi-only-hda-intel-detected-azalia/post/5211273/#5211273