HDMI audio does not work on GeForce GT 220 with lts-utopic kernel

[Henk Poley]

HDMI audio does work on trusty kernel 3.13, but does not on the lts-utopic 3.16 kernel. Which (probably) means HDMI audio does not work on other nvidia cards, and also on 14.10 utopic. I can playback sound in MythTV frontend using 'ALSA:dmix:CARD=NVidia,DEV=7', but using the same with speaker-test gives:

$ speaker-test -D dmix:CARD=NVidia,DEV=7

speaker-test 1.0.27.2

Playback device is dmix:CARD=NVidia,DEV=7
Stream parameters are 48000Hz, S16_LE, 1 channels
Using 16 octaves of pink noise
Sample format not available for playback: Ongeldig argument
Setting of hwparams failed: Ongeldig argument

$ lspci -vvv | grep -i nvidia | tail -n3
02:00.0 VGA compatible controller: NVIDIA Corporation GT216 [GeForce GT 220] (rev a2) (prog-if 00 [VGA controller])
 Kernel driver in use: nvidia
02:00.1 Audio device: NVIDIA Corporation GT216 HDMI Audio Controller (rev a1)

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.2 LTS
Release: 14.04
Codename: trusty

$ aplay -l
**** Lijst van PLAYBACK hardware-apparaten ****
kaart 1: NVidia [HDA NVidia], apparaat 3: HDMI 0 [HDMI 0]
  Sub-apparaten: 1/1
  Sub-apparaat #0: subdevice #0
kaart 1: NVidia [HDA NVidia], apparaat 7: HDMI 0 [HDMI 0]
  Sub-apparaten: 1/1
  Sub-apparaat #0: subdevice #0
kaart 1: NVidia [HDA NVidia], apparaat 8: HDMI 0 [HDMI 0]
  Sub-apparaten: 1/1
  Sub-apparaat #0: subdevice #0
kaart 1: NVidia [HDA NVidia], apparaat 9: HDMI 0 [HDMI 0]
  Sub-apparaten: 1/1
  Sub-apparaat #0: subdevice #0

[Henk Poley (henkpoley)]

I solved this by changing the snd-hda-intel probe_mask in /etc/modprobe.d/sound.conf

$ diff -ubB modprobe.d/sound.conf modprobe.d/sound.conf.bak
--- modprobe.d/sound.conf 2015-03-10 09:29:37.000000000 +0100
+++ modprobe.d/sound.conf.bak 2015-01-14 19:40:18.000000000 +0100
@@ -1,4 +1,4 @@
 alias snd-card-0 snd-hda-intel
 alias sound-slot-0 snd-hda-intel
-#options snd-hda-intel enable_msi=0 probe_mask=0xfff2
-options snd-hda-intel enable_msi=0 probe_mask=0xffff,0xfff2
+options snd-hda-intel enable_msi=0 probe_mask=0xfff2
+#options snd-hda-intel enable_msi=0 probe_mask=0xffff,0xfff2

Then it's just a matter of setting the proper default pulseaudio sound device in `pavucontrol`.

It would be nice if this was set by default in either the kernel or ubuntu's alsa config.

[penalvch (penalvch)]

Henk Poley, thank you for reporting this and helping make Ubuntu better. Could you please execute the following command, as it will automatically gather debugging information, in a terminal:
apport-collect 1417450

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]