Audio Out hissing interference from speakers when connecting VGA/DVI lead

Hi
If I connect my mac air to an amp with speakers via an audio out lead then I get great sound. As soon as I additionaly connect the Mac Air to my LCD TV via the VGA or DVI cables I get this annoying hissing sound that gets louder if I turn the volume up.
I have swapped my audio lead for another but still the same problem.
I used to use the same audio/video leads with an old laptop and had no problems. I assume that the issue is due to the fact that the audio and video connector on the Mac Air are very close to eachother.
Has anyone else had a similer issue or can suggest any alternatives or resolutions? Many thanks.

Thanks for the pointer. Unfortunately it didn't work for me either. I guessed from your original post and got the Monster® iCableLink™ Headphone Adapter for iPhone™ cable. It appears to be a 3.5mm to 3.5mm adapter, which seems odd.
However it doesn't stop the buzzing. What I found did help a bit was to turn the volume on the mac all the way to the top and adjust the volume on the amp to listening volume. That kept the buzzing fairly tame at normal listening volumes.
Any other suggestions would be great.

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I have a Dell XPS14 running Arch, which has worked fine for a while, but now has suddenly stopped detecting the internal speakers and headphones, so it will not play sound. I have tried a few things to narrow down the problem, but I've had no luck so far. In GNOME shell, when I press the physical volume up/down buttons on my laptop, it displays a sound icon with "HDMI / DisplayPort" underneath . When I go into the gnome shell audio settings menu, everything is greyed out, and no output devices are listed.
If anyone has any suggestions as to what the problem might be or how I might go about troubleshooting it from here, I would appreciate it.
One thing that struck me was that I had installed a music player, Clementine, recently, and I'm not sure if I did or did not ever have sound after that. I installed Clementine and two optional gstreamer0.10 plugins (bad and ugly). Since this seemed like it would be possibly related, I've since removed Clementine, the new gstreamer plugins, and all of their dependencies not needed by any other package. So I now don't think that is likely to be the problem. Just to be thorough, though, here are the packages which were installed:
[2014-06-03 15:22] [PACMAN] Running 'pacman --color auto -S community/clementine'
[2014-06-03 15:22] [PACMAN] installed mutagen (1.23-1)
[2014-06-03 15:22] [PACMAN] installed sg3_utils (1.38-1)
[2014-06-03 15:22] [PACMAN] installed libgpod (0.8.3-2)
[2014-06-03 15:22] [PACMAN] installed liblastfm (1.0.8-1)
[2014-06-03 15:22] [PACMAN] installed libmtp (1.1.6-6)
[2014-06-03 15:22] [PACMAN] installed qjson (0.8.1-2)
[2014-06-03 15:22] [PACMAN] installed libmygpo-qt (1.0.7-1)
[2014-06-03 15:22] [PACMAN] installed protobuf (2.5.0-3)
[2014-06-03 15:22] [PACMAN] installed qca-ossl (2.0.0-7)
[2014-06-03 15:22] [PACMAN] installed clementine (1.2.3-1)
[2014-06-03 15:23] [PACMAN] Running 'pacman -S gstreamer0.10-bad-plugins gstreamer0.10-ugly-plugins'
[2014-06-03 15:23] [PACMAN] installed libdc1394 (2.2.1-2)
[2014-06-03 15:23] [PACMAN] installed musicbrainz (2.1.5-6)
[2014-06-03 15:23] [PACMAN] installed libcdaudio (0.99.12-7)
[2014-06-03 15:23] [PACMAN] installed ladspa (1.13-4)
[2014-06-03 15:23] [PACMAN] installed liblrdf (0.5.0-2)
[2014-06-03 15:23] [PACMAN] installed gstreamer0.10-bad-plugins (0.10.23-8)
[2014-06-03 15:23] [PACMAN] installed gstreamer0.10-ugly-plugins (0.10.19-11)
Anyway, on to the diagnostics that I have done:
Running
aplay -l
returns:
aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
running
#lspci -vvv | grep -A 40 -i audio
returns:
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
Subsystem: Dell Device 054c
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 47
Region 0: Memory at c0610000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
Address: 00000000fee003f8 Data: 0000
Capabilities: [70] Express (v1) Root Complex Integrated Endpoint, MSI 00
DevCap: MaxPayload 128 bytes, PhantFunc 0
ExtTag- RBE-
DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
MaxPayload 128 bytes, MaxReadReq 128 bytes
DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
Capabilities: [100 v1] Virtual Channel
Caps: LPEVC=0 RefClk=100ns PATEntryBits=1
Arb: Fixed- WRR32- WRR64- WRR128-
Ctrl: ArbSelect=Fixed
Status: InProgress-
VC0: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
Ctrl: Enable+ ID=0 ArbSelect=Fixed TC/VC=01
Status: NegoPending- InProgress-
VC1: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
Ctrl: Enable+ ID=1 ArbSelect=Fixed TC/VC=22
Status: NegoPending- InProgress-
Capabilities: [130 v1] Root Complex Link
Desc: PortNumber=0f ComponentID=00 EltType=Config
Link0: Desc: TargetPort=00 TargetComponent=00 AssocRCRB- LinkType=MemMapped LinkValid+
Addr: 00000000fed1c000
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_inte
and running
dmesg | grep snd_hda_intel
returns
[ 3.405522] snd_hda_intel 0000:00:1b.0: irq 47 for MSI/MSI-X
Any ideas?
Last edited by bond0087 (2014-06-09 02:06:08)

Thanks again for the info and suggestions. I thought the same thing regarding the sparse output of alsamixer, but since I never had trouble with the sound before, I don't know how much would have shown up when everything was working well.
I still haven't really found a smoking gun here, unfortunately. As far as I can tell, the power saving settings look about right, because the power saving settings for the HDMI audio (which works) looks to be the same as the others.
Thanks for the link with more information regarding the module options for the intel sound driver. I'm going to dig into those when I have time next week. The thing that makes me less optimistic that I'm going to fix it with module options is that I can't figure out how those module options would suddenly change.
I'm also going to try out the linux-lts kernel to see if it behaves any differently, and then maybe boot another distro with a usb key to see if it works, and if so, what looks different.
Here's what I get from the suggested tests. Let me know if anyone sees something strange that I missed.
$ lsmod | grep ^snd
snd_hda_codec_hdmi 36716 1
snd_hda_intel 38728 2
snd_hda_codec 101816 2 snd_hda_codec_hdmi,snd_hda_intel
snd_hwdep 6396 1 snd_hda_codec
snd_pcm 81607 3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
snd_timer 19038 1 snd_pcm
snd 60086 10 snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_hda_codec,snd_hda_intel
$ cat /proc/asound/card*/codec*
Codec: Intel PantherPoint HDMI
Address: 3
AFG Function Id: 0x1 (unsol 0)
Vendor Id: 0x80862806
Subsystem Id: 0x1028054c
Revision Id: 0x100000
No Modem Function Group found
Default PCM:
rates [0x0]:
bits [0x0]:
formats [0x0]:
Default Amp-In caps: N/A
Default Amp-Out caps: N/A
State of AFG node 0x01:
Power states: D0 D3 CLKSTOP EPSS
Power: setting=D0, actual=D0, Clock-stop-OK
GPIO: io=0, o=0, i=0, unsolicited=0, wake=0
Node 0x02 [Audio Output] wcaps 0x6611: 8-Channels Digital
Device: name="HDMI 0", type="HDMI", device=3
Converter: stream=8, channel=0
Digital: Enabled GenLevel
Digital category: 0x2
IEC Coding Type: 0x0
PCM:
rates [0x7f0]: 32000 44100 48000 88200 96000 176400 192000
bits [0x1e]: 16 20 24 32
formats [0x5]: PCM AC3
Power states: D0 D3 EPSS
Power: setting=D0, actual=D0
Node 0x03 [Audio Output] wcaps 0x6611: 8-Channels Digital
Converter: stream=0, channel=0
Digital: Enabled
Digital category: 0x0
IEC Coding Type: 0x0
PCM:
rates [0x7f0]: 32000 44100 48000 88200 96000 176400 192000
bits [0x1e]: 16 20 24 32
formats [0x5]: PCM AC3
Power states: D0 D3 EPSS
Power: setting=D0, actual=D0
Node 0x04 [Audio Output] wcaps 0x6611: 8-Channels Digital
Converter: stream=0, channel=0
Digital: Enabled
Digital category: 0x0
IEC Coding Type: 0x0
PCM:
rates [0x7f0]: 32000 44100 48000 88200 96000 176400 192000
bits [0x1e]: 16 20 24 32
formats [0x5]: PCM AC3
Power states: D0 D3 EPSS
Power: setting=D0, actual=D0
Node 0x05 [Pin Complex] wcaps 0x40778d: 8-Channels Digital Amp-Out CP
Control: name="HDMI/DP,pcm=3 Jack", index=0, device=0
Control: name="IEC958 Playback Con Mask", index=0, device=0
Control: name="IEC958 Playback Pro Mask", index=0, device=0
Control: name="IEC958 Playback Default", index=0, device=0
Control: name="IEC958 Playback Switch", index=0, device=0
Control: name="ELD", index=0, device=3
Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-Out vals: [0x00 0x00]
Pincap 0x09000094: OUT Detect HBR HDMI DP
Pin Default 0x18560010: [Jack] Digital Out at Int HDMI
Conn = Digital, Color = Unknown
DefAssociation = 0x1, Sequence = 0x0
Pin-ctls: 0x40: OUT
Unsolicited: tag=01, enabled=1
Power states: D0 D3 EPSS
Power: setting=D0, actual=D0
Connection: 1
0x02
Node 0x06 [Pin Complex] wcaps 0x40778d: 8-Channels Digital Amp-Out CP
Control: name="HDMI/DP,pcm=7 Jack", index=0, device=0
Control: name="IEC958 Playback Con Mask", index=1, device=0
Control: name="IEC958 Playback Pro Mask", index=1, device=0
Control: name="IEC958 Playback Default", index=1, device=0
Control: name="IEC958 Playback Switch", index=1, device=0
Control: name="ELD", index=0, device=7
Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-Out vals: [0x00 0x00]
Pincap 0x09000094: OUT Detect HBR HDMI DP
Pin Default 0x18560020: [Jack] Digital Out at Int HDMI
Conn = Digital, Color = Unknown
DefAssociation = 0x2, Sequence = 0x0
Pin-ctls: 0x40: OUT
Unsolicited: tag=02, enabled=1
Power states: D0 D3 EPSS
Power: setting=D0, actual=D0
Connection: 1
0x03
Node 0x07 [Pin Complex] wcaps 0x40778d: 8-Channels Digital Amp-Out CP
Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-Out vals: [0x00 0x80]
Pincap 0x09000094: OUT Detect HBR HDMI DP
Pin Default 0x58560030: [N/A] Digital Out at Int HDMI
Conn = Digital, Color = Unknown
DefAssociation = 0x3, Sequence = 0x0
Pin-ctls: 0x40: OUT
Unsolicited: tag=00, enabled=0
Power states: D0 D3 EPSS
Power: setting=D0, actual=D0
Connection: 1
0x04
Node 0x08 [Vendor Defined Widget] wcaps 0xf00000: Mono
$ pacman -Qi linux
Name : linux
Version : 3.14.5-1
Description : The Linux kernel and modules
Architecture : x86_64
URL : http://www.kernel.org/
Licenses : GPL2
Groups : base
Provides : kernel26=3.14.5
Depends On : coreutils linux-firmware kmod mkinitcpio>=0.7
Optional Deps : crda: to set the correct wireless channels of your country
Required By : virtualbox-host-modules
Optional For : None
Conflicts With : kernel26
Replaces : kernel26
Installed Size : 71950.00 KiB
Packager : Tobias Powalowski <[email protected]>
Build Date : Sun 01 Jun 2014 01:40:01 AM EDT
Install Date : Thu 05 Jun 2014 12:30:36 AM EDT
Install Reason : Explicitly installed
Install Script : Yes
Validated By : Signature
$ uname -a
Linux CaliforniaChrome 3.14.5-1-ARCH #1 SMP PREEMPT Sun Jun 1 07:36:23 CEST 2014 x86_64 GNU/Linux

Audio-out hiss/noise problems

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noodl<<Font face="BlizzardD">ehead»

Can not select TV speakers when connected via HDMI

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I have restarted with no success in changing this behaviour. If I open/close the lid, the sound goes to the proper settings for about 2s but then the HDMI speakers are de-selected and the built-in speakers are highlighted. I can manually select the TV speakers but the setting has no effect.
However, I *am* getting audio output through the TV but can not control volume from the mac or any app. I slide the volume slider on the menu bar and the audio output does not change. The sound is also playing from the laptop speakers which is highly annoying.

and now there is no audio through the TV at all. TV works fine with other inputs such as PS3. Any help?

Audio Out hissing interference from speakers when connecting VGA/DVI lead

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