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  1. 7th June 2012, 02:00 PM #1
    landho
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    No sound through HDMI with ivy bridge

    Hi,

    This problem shouldn't be too difficult since it was working on Kubuntu, but I just don't know where to start!

    I've just moved over to fedora 17 from Kubuntu, along with a hardware upgrade. I cannot get the sound to work in fedora, but when I tried booting my old Kubuntu system the sound just works.

    the device from lspci is:
    00:1b.0 Audio device: Intel Corporation Panther Point High Definition Audio Controller (rev 04)

    I am running an i5-3750k on a z77 motherboard and using the on board graphics and sound.

    Everything has been left as default apart from selecting HDMI output with the gnome settings manager, and fiddling with the volumes with alsamixer (which does nothing in either system when HDMI is the output).

    This is my results from the alsa script: http://www.alsa-project.org/db/f=c1e...cc1f2970ee2013

    Update:

    My device is coming up in aplay -l and I can play sound to the device using aplay, but pavucontrol is only seeing the first HDMI device. How can I get it to recognise the other device? Is there a way I can block the first device if that might help? I have no idea how to go about this problem, so any help would be much appreciated. I really like fedora and do not want to install Ubuntu just to get sound.
    Last edited by landho; 8th June 2012 at 03:34 AM.
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  2. 7th June 2012, 02:01 PM #2
    landho
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    Re: No sound through HDMI with ivy bridge

    This is an excerpt showing the differences in the alsa information script results using sdiff:

    On the left is the results of the ALSA Information script from fedora where the sound does not work. On the right is kubuntu where the sound is working.

    | means a line is different and >,< are for lines that are not present on the other side.

    START:

    Code:
    upload=true&script=true&cardinfo=				upload=true&script=true&cardinfo=
!!################################				!!################################
!!ALSA Information Script v 0.4.60				!!ALSA Information Script v 0.4.60
!!################################				!!################################

!!Script ran on: Thu Jun  7 11:04:03 UTC 2012		      |	!!Script ran on: Thu Jun  7 01:32:29 UTC 2012


!!Linux Distribution						!!Linux Distribution
!!------------------						!!------------------

Fedora release 17 (Beefy Miracle) Fedora release 17 (Beefy Mi |	Ubuntu 12.04 LTS \n \l DISTRIB_ID=Ubuntu DISTRIB_DESCRIPTION=


!!Kernel Information						!!Kernel Information
!!------------------						!!------------------

Kernel release:    3.3.7-1.fc17.x86_64			      |	Kernel release:    3.2.0-24-generic


!!ALSA Version							!!ALSA Version
!!------------							!!------------

Library version:    					      |	Library version:    1.0.25



!!Sound Servers on this system					!!Sound Servers on this system
!!----------------------------					!!----------------------------

Jack:							      |	ESound Daemon:
      Installed - Yes (/usr/bin/jackd)			      |	      Installed - Yes (/usr/bin/esd)
      Running - No						      Running - No


!!Advanced information - PCI Vendor/Device/Subsystem ID's	!!Advanced information - PCI Vendor/Device/Subsystem ID's
!!--------------------------------------------------------	!!--------------------------------------------------------

00:1b.0 0403: 8086:1e20 (rev 04)				00:1b.0 0403: 8086:1e20 (rev 04)
	Subsystem: 8086:2032						Subsystem: 8086:2032


							      >	!!Modprobe options (Sound related)
							      >	!!--------------------------------
							      >
							      >	snd-atiixp-modem: index=-2
							      >	snd-intel8x0m: index=-2
							      >	snd-via82xx-modem: index=-2
							      >	snd-usb-audio: index=-2
							      >	snd-usb-caiaq: index=-2
							      >	snd-usb-ua101: index=-2
							      >	snd-usb-us122l: index=-2
							      >	snd-usb-usx2y: index=-2
							      >	snd-cmipci: mpu_port=0x330 fm_port=0x388
							      >	snd-pcsp: index=-2
							      >	snd-usb-audio: index=-2
							      >
							      >

!!HDA-Intel Codec information					!!HDA-Intel Codec information
!!---------------------------					!!---------------------------

  Amp-Out vals:  [0x2f 0x2f]				      |	  Amp-Out vals:  [0x2c 0x2c]

  Amp-Out vals:  [0x2f 0x2f]				      |	  Amp-Out vals:  [0x2c 0x2c]

  Amp-Out vals:  [0x2f 0x2f]				      |	  Amp-Out vals:  [0x2c 0x2c]

  Amp-Out vals:  [0x2f 0x2f]				      |	  Amp-Out vals:  [0x2c 0x2c]
  Digital: Enabled GenLevel				      |	  Digital: Enabled
  Digital category: 0x2					      |	  Digital category: 0x0


  Amp-In vals:  [0x80 0x80] [0x81 0x81] [0x8f 0x8f] [0x80 0x8 |	  Amp-In vals:  [0x80 0x80] [0x8d 0x8d] [0x80 0x80] [0x80 0x8


  Digital: Enabled GenLevel				      |	  Digital: Enabled
  Digital category: 0x2					      |	  Digital category: 0x0

  Amp-In vals:  [0x00 0x00]				      |	  Amp-In vals:  [0x01 0x01]

  Converter: stream=8, channel=0			      |	  Converter: stream=0, channel=0
  Digital: Enabled					      |	  Digital: Enabled GenLevel
  Digital category: 0x0					      |	  Digital category: 0x2

  Converter: stream=0, channel=0			      |	  Converter: stream=8, channel=0

!!Amixer output							!!Amixer output
!!-------------							!!-------------

!!-------Mixer controls for card 0 [PCH]			!!-------Mixer controls for card 0 [PCH]

  Controls      : 49					      |	  Controls      : 50
  Simple ctrls  : 20					      |	  Simple ctrls  : 21

  Mono: Playback 47 [73%] [-17.00dB] [on]		      |	  Mono: Playback 44 [69%] [-20.00dB] [on]

  Front Left: Playback 1 [3%] [-33.00dB] [off]		      |	  Front Left: Playback 13 [42%] [-15.00dB] [off]
  Front Right: Playback 1 [3%] [-33.00dB] [off]		      |	  Front Right: Playback 13 [42%] [-15.00dB] [off]

  Front Left: 0 [0%] [0.00dB]				      |	  Front Left: 1 [33%] [10.00dB]
  Front Right: 0 [0%] [0.00dB]				      |	  Front Right: 1 [33%] [10.00dB]

  Front Left: Playback 15 [48%] [-12.00dB] [off]	      |	  Front Left: Playback 0 [0%] [-34.50dB] [off]
  Front Right: Playback 15 [48%] [-12.00dB] [off]	      |	  Front Right: Playback 0 [0%] [-34.50dB] [off]

  Front Left: Capture 11 [24%] [-5.00dB] [off]		      |	  Front Left: Capture 0 [0%] [-16.00dB] [off]
  Front Right: Capture 11 [24%] [-5.00dB] [off]		      |	  Front Right: Capture 0 [0%] [-16.00dB] [off]
							      >	Simple mixer control 'Digital',0
							      >	  Capabilities: cvolume penum
							      >	  Capture channels: Front Left - Front Right
							      >	  Limits: Capture 0 - 120
							      >	  Front Left: Capture 60 [50%] [0.00dB]
							      >	  Front Right: Capture 60 [50%] [0.00dB]

!!Alsactl output						!!Alsactl output
!!-------------							!!-------------

	control.13 {							control.13 {
		iface MIXER							iface MIXER
		name 'Front Mic Playback Volume'				name 'Front Mic Playback Volume'
		value.0 1				      |			value.0 13
		value.1 1				      |			value.1 13
		comment {							comment {
			access 'read write'						access 'read write'
			type INTEGER							type INTEGER
			count 2								count 2
			range '0 - 31'							range '0 - 31'
			dbmin -3450							dbmin -3450
			dbmax 1200							dbmax 1200
			dbvalue.0 -3300			      |				dbvalue.0 -1500
			dbvalue.1 -3300			      |				dbvalue.1 -1500
		}								}
	}								}
	control.15 {							control.15 {
		iface MIXER							iface MIXER
		name 'Line Playback Volume'					name 'Line Playback Volume'
		value.0 15				      |			value.0 0
		value.1 15				      |			value.1 0
		comment {							comment {
			access 'read write'						access 'read write'
			type INTEGER							type INTEGER
			count 2								count 2
			range '0 - 31'							range '0 - 31'
			dbmin -3450							dbmin -3450
			dbmax 1200							dbmax 1200
			dbvalue.0 -1200			      |				dbvalue.0 -3450
			dbvalue.1 -1200			      |				dbvalue.1 -3450
		}								}
	}			control.18 {							control.18 {
		iface MIXER							iface MIXER
		name 'Front Mic Boost Volume'					name 'Front Mic Boost Volume'
		value.0 0				      |			value.0 1
		value.1 0				      |			value.1 1
		comment {							comment {
			access 'read write'						access 'read write'
			type INTEGER							type INTEGER
			count 2								count 2
			range '0 - 3'							range '0 - 3'
			dbmin 0								dbmin 0
			dbmax 3000							dbmax 3000
			dbvalue.0 0			      |				dbvalue.0 1000
			dbvalue.1 0			      |				dbvalue.1 1000
		}								}
	}								}

	control.22 {							control.22 {
		iface MIXER							iface MIXER
		name 'Capture Volume'						name 'Capture Volume'
		index 1								index 1
		value.0 11				      |			value.0 0
		value.1 11				      |			value.1 0
		comment {							comment {
			access 'read write'						access 'read write'
			type INTEGER							type INTEGER
			count 2								count 2
			range '0 - 46'							range '0 - 46'
			dbmin -1600							dbmin -1600
			dbmax 3000							dbmax 3000
			dbvalue.0 -500			      |				dbvalue.0 -1600
			dbvalue.1 -500			      |				dbvalue.1 -1600
		}								}
	}								}

							      >		control.50 {
							      >			iface MIXER
							      >			name 'Digital Capture Volume'
							      >			value.0 60
							      >			value.1 60
							      >			comment {
							      >				access 'read write user'
							      >				type INTEGER
							      >				count 2
							      >				range '0 - 120'
							      >				tlv '0000000100000008fffff44800000032
							      >				dbmin -3000
							      >				dbmax 3000
							      >				dbvalue.0 0
							      >				dbvalue.1 0
							      >			}
							      >		}
}								}

!!All Loaded Modules						!!All Loaded Modules
!!------------------						!!------------------

							      >	snd_seq_midi
							      >	snd_rawmidi
							      >	snd_seq_midi_event
							      >	snd_seq

							      >	snd_seq_device

!!ALSA/HDA dmesg						!!ALSA/HDA dmesg
!!------------------						!!------------------

[    6.030531] e1000e 0000:00:19.0: eth0: MAC: 10, PHY: 11, P |	[   17.746054] parport0: PC-style at 0x378, irq 7 [PCSPP,TRIS
[    6.030663] snd_hda_intel 0000:00:1b.0: irq 44 for MSI/MSI |	[   17.754025] snd_hda_intel 0000:00:1b.0: PCI INT A -> GSI 2
[    6.043423] udevd[446]: renamed network interface eth0 to  |	[   17.754068] snd_hda_intel 0000:00:1b.0: irq 44 for MSI/MSI
--							      |	[   17.754090] snd_hda_intel 0000:00:1b.0: setting latency ti
[    6.061728] SELinux: initialized (dev sda2, type ext4), us |	[   17.778544] type=1400 audit(1339030666.187:2): apparmor="S
    Last edited by landho; 8th June 2012 at 02:02 AM.
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  3. 8th June 2012, 01:32 AM #3
    landho
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    Re: No sound through HDMI with ivy bridge

    and dmesg diffs:
    Code:
    !!ALSA/HDA dmesg						!!ALSA/HDA dmesg
!!------------------						!!------------------

[    6.030531] e1000e 0000:00:19.0: eth0: MAC: 10, PHY: 11, P |	[   17.746054] parport0: PC-style at 0x378, irq 7 [PCSPP,TRIS
[    6.030663] snd_hda_intel 0000:00:1b.0: irq 44 for MSI/MSI |	[   17.754025] snd_hda_intel 0000:00:1b.0: PCI INT A -> GSI 2
[    6.043423] udevd[446]: renamed network interface eth0 to  |	[   17.754068] snd_hda_intel 0000:00:1b.0: irq 44 for MSI/MSI
--							      |	[   17.754090] snd_hda_intel 0000:00:1b.0: setting latency ti
[    6.061728] SELinux: initialized (dev sda2, type ext4), us |	[   17.778544] type=1400 audit(1339030666.187:2): apparmor="S
[    6.548370] ALSA sound/pci/hda/patch_realtek.c:1253 SKU: N <
[    6.548374] ALSA sound/pci/hda/patch_realtek.c:1255 SKU: p <
[    6.548377] ALSA sound/pci/hda/patch_realtek.c:1256 SKU: e <
[    6.548379] ALSA sound/pci/hda/patch_realtek.c:1257 SKU: c <
[    6.548382] ALSA sound/pci/hda/patch_realtek.c:1258 SKU: c <
[    6.548384] ALSA sound/pci/hda/patch_realtek.c:1259 SKU: e <
[    6.548387] ALSA sound/pci/hda/patch_realtek.c:1260 SKU: p <
[    6.548389] ALSA sound/pci/hda/patch_realtek.c:1261 SKU: s <
[    6.548392] ALSA sound/pci/hda/patch_realtek.c:1262 SKU: o <
[    6.548574] ALSA sound/pci/hda/hda_codec.c:4927 autoconfig <
[    6.548578] ALSA sound/pci/hda/hda_codec.c:4931    speaker <
[    6.548581] ALSA sound/pci/hda/hda_codec.c:4935    hp_outs <
[    6.548583] ALSA sound/pci/hda/hda_codec.c:4936    mono: m <
[    6.548586] ALSA sound/pci/hda/hda_codec.c:4939    dig-out <
[    6.548588] ALSA sound/pci/hda/hda_codec.c:4940    inputs: <
[    6.548591] ALSA sound/pci/hda/hda_codec.c:4944  Rear Mic= <
[    6.548594] ALSA sound/pci/hda/hda_codec.c:4944  Front Mic <
[    6.548596] ALSA sound/pci/hda/hda_codec.c:4944  Line=0x1a <
[    6.548598] ALSA sound/pci/hda/hda_codec.c:4946 	      <
[    6.550611] ALSA sound/pci/hda/patch_realtek.c:1316 realte <
[    6.550614] ALSA sound/pci/hda/patch_realtek.c:1332 realte <
[    6.559914] HDMI hot plug event: Codec=3 Pin=7 Presence_De <
[    6.559997] HDMI status: Codec=3 Pin=7 Presence_Detect=1 E <
[    6.560149] HDMI status: Codec=3 Pin=6 Presence_Detect=0 E <
[    6.560226] HDMI status: Codec=3 Pin=7 Presence_Detect=1 E <
[    6.565619] HDMI: detected monitor PTV94203 at connection  <
[    6.565620] HDMI: available speakers: FL/FR		      <
[    6.565622] HDMI: supports coding type LPCM: channels = 2, <
[    6.565625] HDMI hot plug event: Codec=3 Pin=7 Presence_De <
[    6.565703] HDMI status: Codec=3 Pin=7 Presence_Detect=1 E <
[    6.567934] HDMI: detected monitor PTV94203 at connection  <
[    6.567935] HDMI: available speakers: FL/FR		      <
[    6.567937] HDMI: supports coding type LPCM: channels = 2, <
[    6.567983] input: HDA Intel PCH HDMI/DP,pcm=7 as /devices <
[    6.568149] input: HDA Intel PCH HDMI/DP,pcm=3 as /devices <
[    6.568214] input: HDA Intel PCH Line as /devices/pci0000: <
[    6.568270] input: HDA Intel PCH Rear Mic as /devices/pci0 <
[    6.568322] input: HDA Intel PCH Line Out CLFE as /devices <
[    6.568378] input: HDA Intel PCH Line Out Surround as /dev <
[    6.568435] input: HDA Intel PCH Line Out Front as /device <
[    6.568836] ACPI Warning: 0x000000000000f040-0x00000000000 <
[    6.568840] ACPI: If an ACPI driver is available for this  <
[    6.571328] HDMI: detected monitor PTV94203 at connection  <
[    6.571329] HDMI: available speakers: FL/FR		      <
[    6.571330] HDMI: supports coding type LPCM: channels = 2, <
[    7.886753] type=1400 audit(1339061049.779:4): avc:  denie <
--								--
[  153.522429] SELinux: initialized (dev fusectl, type fusect |	[   18.142953] udevd[468]: renamed network interface eth0 to 
[  154.230485] HDMI hot plug event: Codec=3 Pin=7 Presence_De |	[   18.363352] HDMI hot plug event: Codec=3 Pin=7 Presence_De
[  154.230525] HDMI status: Codec=3 Pin=7 Presence_Detect=0 E |	[   18.363516] HDMI status: Codec=3 Pin=7 Presence_Detect=1 E
[  154.406966] HDMI hot plug event: Codec=3 Pin=7 Presence_De |	[   18.363558] HDMI status: Codec=3 Pin=6 Presence_Detect=0 E
[  154.407007] HDMI status: Codec=3 Pin=7 Presence_Detect=1 E |	[   18.363641] HDMI status: Codec=3 Pin=7 Presence_Detect=1 E
[  154.707685] HDMI status: Codec=3 Pin=7 Presence_Detect=1 E |	[   18.367490] HDMI: detected monitor PTV94203 at connection 
[  154.711186] HDMI: detected monitor PTV94203 at connection  |	[   18.367491] HDMI: available speakers: FL/FR
[  154.711189] HDMI: available speakers: FL/FR		      |	[   18.367493] HDMI: supports coding type LPCM: channels = 2,
[  154.711193] HDMI: supports coding type LPCM: channels = 2, |	[   18.367583] input: HDA Intel PCH HDMI/DP,pcm=7 as /devices
[  180.271533] HDMI hot plug event: Codec=3 Pin=7 Presence_De |	[   18.370726] HDMI: detected monitor PTV94203 at connection 
[  180.271570] HDMI status: Codec=3 Pin=7 Presence_Detect=0 E |	[   18.370728] HDMI: available speakers: FL/FR
[  180.451945] HDMI hot plug event: Codec=3 Pin=7 Presence_De |	[   18.370730] HDMI: supports coding type LPCM: channels = 2,
[  180.451987] HDMI status: Codec=3 Pin=7 Presence_Detect=1 E |	[   18.370734] HDMI hot plug event: Codec=3 Pin=7 Presence_De
[  180.752680] HDMI status: Codec=3 Pin=7 Presence_Detect=1 E |	[   18.370786] HDMI status: Codec=3 Pin=7 Presence_Detect=1 E
[  180.756224] HDMI: detected monitor PTV94203 at connection  |	[   18.373978] input: HDA Intel PCH HDMI/DP,pcm=3 as /devices
[  180.756226] HDMI: available speakers: FL/FR		      |	[   18.374021] input: HDA Intel PCH Line as /devices/pci0000:
[  180.756227] HDMI: supports coding type LPCM: channels = 2, |	[   18.374056] input: HDA Intel PCH Rear Mic as /devices/pci0
[  188.020164] SELinux: initialized (dev proc, type proc), us |	[   18.374089] input: HDA Intel PCH Line-Out CLFE as /devices
[ 1942.253088] HDMI hot plug event: Codec=3 Pin=7 Presence_De |	[   18.374123] input: HDA Intel PCH Line-Out Surround as /dev
[ 1942.253140] HDMI status: Codec=3 Pin=7 Presence_Detect=0 E |	[   18.374156] input: HDA Intel PCH Line-Out Front as /device
[ 1953.508300] HDMI hot plug event: Codec=3 Pin=7 Presence_De |	[   18.374367] mei 0000:00:16.0: PCI INT A -> GSI 16 (level, 
[ 1953.508358] HDMI status: Codec=3 Pin=7 Presence_Detect=1 E <
[ 1953.808533] HDMI status: Codec=3 Pin=7 Presence_Detect=1 E <
[ 1953.812114] HDMI: detected monitor PTV94203 at connection  <
[ 1953.812115] HDMI: available speakers: FL/FR		      <
[ 1953.812117] HDMI: supports coding type LPCM: channels = 2, <
[ 2642.835866] HDMI hot plug event: Codec=3 Pin=7 Presence_De <
[ 2642.835922] HDMI status: Codec=3 Pin=7 Presence_Detect=0 E <
[ 5955.625218] [drm:drm_edid_block_valid] *ERROR* EDID checks <
--								--
[ 5955.824611]  	00 16 50 0e 5b 10 00 0a 20 20 20 20 2 |	[   18.374429] mei 0000:00:16.0: irq 45 for MSI/MSI-X
[ 5955.824614] i915 0000:00:02.0: HDMI-A-3: EDID block 0 inva |	[   18.374614] HDMI: detected monitor PTV94203 at connection 
[ 5964.680447] [drm:drm_edid_block_valid] *ERROR* EDID checks |	[   18.374615] HDMI: available speakers: FL/FR
							      >	[   18.374617] HDMI: supports coding type LPCM: channels = 2,
							      >	[   18.694755] EXT4-fs (dm-2): re-mounted. Opts: errors=remou
--								--
[ 5964.680456]  	ff ff ff ff ff ff ff ff ff ff ff ff f |	[   32.774313] eth1: no IPv6 routers present
[ 5978.836263] HDMI hot plug event: Codec=3 Pin=7 Presence_De |	[   58.831294] HDMI hot plug event: Codec=3 Pin=7 Presence_De
[ 5978.836317] HDMI status: Codec=3 Pin=7 Presence_Detect=1 E |	[   58.831332] HDMI status: Codec=3 Pin=7 Presence_Detect=0 E
[ 5979.136980] HDMI status: Codec=3 Pin=7 Presence_Detect=1 E |	[   59.031211] HDMI hot plug event: Codec=3 Pin=7 Presence_De
[ 5979.140598] HDMI: detected monitor PTV94203 at connection  |	[   59.031257] HDMI status: Codec=3 Pin=7 Presence_Detect=1 E
[ 5979.140599] HDMI: available speakers: FL/FR		      |	[   59.330985] HDMI status: Codec=3 Pin=7 Presence_Detect=1 E
[ 5979.140601] HDMI: supports coding type LPCM: channels = 2, |	[   59.334496] HDMI: detected monitor PTV94203 at connection 
							      >	[   59.334497] HDMI: available speakers: FL/FR
							      >	[   59.334499] HDMI: supports coding type LPCM: channels = 2,


    ---------- Post added 8th June 2012 at 12:36 AM ---------- Previous post was 7th June 2012 at 11:01 PM ----------

    I can get sound now if i type

    Code:
    aplay -D plughw:0,7 /usr/share/sounds/alsa/Front_Right.wav
    But I don't think this device is coming up in 'pavucontrol'.

    I tried adding /etc/pulse/default.pa
    Code:
    load-module module-alsa-sink device=hw:0,7
and
load-module module-alsa-sink device=plughw:0,7
    but then alsa does not start, and nothing works.

    ---------- Post added at 10:32 AM ---------- Previous post was at 12:36 AM ----------

    So more explicitly, I think the display port or dvi is being detected by pavucontrol but it is ignoring the HDMI port which my television is plugged into. How can I get it to see my HDMI port which is at 0,7.

    It is coming up with aplay -l

    Code:
    **** List of PLAYBACK Hardware Devices ****
card 1: PCH [HDA Intel PCH], device 0: ALC892 Analog [ALC892 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 1: ALC892 Digital [ALC892 Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
    Last edited by landho; 8th June 2012 at 02:03 AM.
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  4. 2nd July 2012, 12:03 AM #4
    geoffleach
    geoffleach is offline Registered User
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    Re: No sound through HDMI with ivy bridge

    FWIW, I have the same problem. Intel DH77DF MB 64 but Fedora 17. I can reproduce the problem using Knoppix (a 2.6 kernel and presumably 32-bit). OTOH, Windows 7 has no problems with sound. From this I conclude that its a problem in the snd_hda_intel driver.
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  5. 2nd July 2012, 12:11 AM #5
    landho
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    Re: No sound through HDMI with ivy bridge

    Hi,

    Try these links!

    ftp://download.nvidia.com/XFree86/gp..._in_pulseaudio

    https://wiki.archlinux.org/index.php...Audio/Examples
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  6. 9th July 2012, 12:20 AM #6
    geoffleach
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    Re: No sound through HDMI with ivy bridge

    The second link led me to discovering that -D plughw:0,7 was what I wanted. Thanks.
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