Sound disappeared from HDMI. MSI message in dmesg.

Question

I use a laptop with slim/xmonad and frequently plug it into my TV and found this to automate the process off setting sound and picture when i plug it in.
Tested it out and seemed to work fine, and now 2 days later, I get no sound from HDMI. PC speaker and headphones work fine and with other PC sound works over HDMI.
I checked and it does change asound.conf when I insert HDMI cable. I don't use a .asoundrc.conf for this user.
/etc/asound.conf
pcm "hw:0,3"
But I still get no sound from system or with:
speaker-test -c 2 -D plughw:0,3
I have checked alsamixer if any channels are muted and also manually restarted alsa with:
systemctl restart alsa-restore
Some info:
lspci | grep -i audio
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05)
aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC270 Analog [ALC270 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
aplay -L
null
Discard all samples (playback) or generate zero samples (capture)
pulse
PulseAudio Sound Server
sysdefault:CARD=Intel
HDA Intel, ALC270 Analog
Default Audio Device
front:CARD=Intel,DEV=0
HDA Intel, ALC270 Analog
Front speakers
surround40:CARD=Intel,DEV=0
HDA Intel, ALC270 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=Intel,DEV=0
HDA Intel, ALC270 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Intel,DEV=0
HDA Intel, ALC270 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Intel,DEV=0
HDA Intel, ALC270 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Intel,DEV=0
HDA Intel, ALC270 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
hdmi:CARD=Intel,DEV=0
HDA Intel, HDMI 0
HDMI Audio Output
lsmod | grep snd
snd_hda_codec_hdmi 24487 1
snd_hda_codec_realtek 61193 1
snd_hda_intel 26180 2
snd_hda_codec 98033 3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel
snd_hwdep 6300 1 snd_hda_codec
snd_pcm 75167 4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
snd_page_alloc 7217 2 snd_pcm,snd_hda_intel
snd_timer 18934 2 snd_pcm
snd 59989 9 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_hda_codec,snd_hda_intel
soundcore 5442 1 snd
I'm not to familiar with how things should look but shouldn't HDA Intel, ALC270 Analog be along in:
aplay -L
hdmi:CARD=Intel,DEV=0
HDA Intel, HDMI 0
HDMI Audio Output
Also a curious message in dmesg, I'm not using anything from MSI asfar as I know.
dmesg | grep snd
[ 4.922456] snd_hda_intel 0000:00:1b.0: irq 45 for MSI/MSI-X

Answer 1

I was having the same problem.  Here's what worked for me:
Remove the blueray disc from the player.
Reboot the laptop.
Turn on the TV and select it's HDMI input.
Connect the HDMI cable from the TV to the laptop.
The display should transfer to the TV (laptop goes black)
Open the Mediasmart player.
Select DVD
Open "Settings" (the gear symbol)
Click "Audio" tab
Select "HDMI passthrough" and apply.
NOW, put the blueray disc into the  drive.
Give it some time to start on it's own.
(Note; If you try to adjust the "settings" with a disc in the drive, or without having the HDMI cable attached, the "HDMI passthrough" will not be shown as an option.)
Now that I follow this procedure, I haven't had any further trouble. The TV plays the audio, not the laptop, and I can use my home theater sound system by taking the "audio out" from the TV and inputting it into my decoder (and turn the TV volume all the way down).
I hope this helps. I was pulling out my hair till I discovered this. Let us know if it works for you.
Message Edited by hd1 on 08-25-2009 09:39 AM