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I have just built a computer and installed 14.04 (trusty) from USB. When I was trying Ubuntu running off the USB the audio was working, as it was after I installed Ubuntu.

Then I changed my graphics to my graphics card -Gigabyte nvidia 960 4GB DDR5, dual DVI-I/D + Display port + HDMI, and the audio stopped working. The graphics are working fine.

I believe the problem is that the audio is now being routed through my graphics card to the HDMI, but I am unable to test this as I have no HDMI devices.

I have checked this question and this question, but have ensured that my Intel Audio is set to enabled in the BIOS. I have also tried following the fix suggested here and here, but changing this conf file has not given me any fix.

I think that Ubuntu is still recognising the motherboard audio, but is not allowing it to be selected any more.

From lshw:

...
       *-multimedia
            description: Audio device
            product: NVIDIA Corporation
            vendor: NVIDIA Corporation
            physical id: 0.1
            bus info: pci@0000:01:00.1
            version: a1
            width: 32 bits
            clock: 33MHz
            capabilities: pm msi pciexpress bus_master cap_list
            configuration: driver=snd_hda_intel latency=0
            resources: irq:17 memory:df080000-df083fff

...
    *-multimedia
         description: Audio device
         product: Intel Corporation
         vendor: Intel Corporation
         physical id: 1f.3
         bus info: pci@0000:00:1f.3
         version: 31
         width: 64 bits
         clock: 33MHz
         capabilities: pm msi cap_list
         configuration: driver=snd_hda_intel latency=32
         resources: irq:16 memory:df220000-df223fff memory:df200000-df20ffff

...

And from aplay -l

**** List of PLAYBACK Hardware Devices ****
card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 9: HDMI 3 [HDMI 3]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Anyone got any pointers? Feel free to ask any further questions.

1 Answer 1

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Finally found an answer: the same as this question: Install the oem-audio-hda-daily-lts-vivid-dkms package from here.

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