[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

** Tags removed: artful zesty -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss Status in Dell Sputnik:

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Thanks for your feedback, so I'll leave it as it is. ** Changed in: linux (Ubuntu) Status: In Progress => Won't Fix -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title:

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

For the output volume I made the following observations: * Even with a volume boost of 150% in Pulseaudio (the maximum), the output volume is still significantly lower than the unpatched kernel * With 150% pulseaudio boost, I can hear disortions and crackling, so the sound quality gets

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Here you go: diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c index 1aa21d7e7245..06af38c37fec 100644 --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -4553,6 +4553,17 @@ static void alc271_hp_gate_mic_jack(struct hda_codec *codec, } }

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Kai, I compile my own kernels and I would like to use this right now, could you please link me the patch? The test kernel floods my syslog badly with touchpad debug entries (unrelated to this bug). Now regarding testing: By software boost you mean we should test both: Microphone software boost

Re: [Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

On Sat, Jul 1, 2017 at 1:11 AM, Esokrates wrote: > Kai: I do not understand your last comment, could you elaborate? Did you > mean we should test if software boost = pulseaudio boost performs well > enough? Yes. > Kai, I am quite happy with >

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Kai: I do not understand your last comment, could you elaborate? Did you mean we should test if software boost = pulseaudio boost performs well enough? Kai, I am quite happy with http://people.canonical.com/~khfeng/lp1654448-2/ please link me the patch as the only drawback would be the lower

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

That's exactly the testing kernel built for - to test if software boost performs well. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Could you please post the patch for http://people.canonical.com/~khfeng/lp1654448-2/ ? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Kai, http://people.canonical.com/~khfeng/lp1654448-2/ does not have the hiss :-). Would compensating the lower output volume with setting pulseaudio to 100+% make the quality worse? Does setting pulseaudio to e.g. 130% disort the quality? -- You received this bug notification because you are a

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Here you go: http://people.canonical.com/~khfeng/lp1654448-2/ -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Esokrates, Traditional Microphone can work while disabling the hiss. I'll build a new kernel for you to test. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

I haven't yet tested the latest test kernels but disagree with comment #85. As mentioned in comment #77: "Although I can't help but think that we could still fix this by limiting the volume more (or finding some gain setting that is on but shouldn't be). Having headphone volume that doesn't go

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Kai, Thank you very much for looking into this and answering questions. Kudos! I think the behavior should remain as it is if the output volume is reduced that much AND support for microphone devices is crippled. My arguments: It is still better to hear the hiss when music is at low volume than

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Yeah but I don't think it gets through to the right people. If I read most of the forums discussions no one acknowledges the problem. Only suggestions are to install the latest drivers. The 9360 came out one year after the 9350 and still has the same issue. User's experiences are not that grave

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

I think they are already aware - a quick google on "xps headphone noise" shows several results, affecting all OS. So make the fix in the driver is a more practical approach. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Kai: I understand what you are saying ... but I would find it great if you could point that out to Dell ... just because now it is bad, does not mean it can't be improved in the future. With proper hardware testing this could have been avoided. -- You received this bug notification because you

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

It appears the headphone socket is right on the motherboard: https://www.ifixit.com/Device/Dell_XPS_13 However, whether it's on the motherboard or a daughterboard probably would not matter in this case. The problem is so prevalent among XPS 13 models that replacing parts probably would not solve

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

IIUC hardware amp (the "Headphone Mic Boost" here) is disabled for Headphone/Mic/Headset combo jack (which is used on this laptop) on Windows. Esokrates, The reality is that noise happens on a lot of machines - there are already lots of noise workaround in ALSA driver - this is just being one of

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Kai: Yeah but it would be nevertheless good to communicate that to the right people of Dell. Is this an integrated component I can't exchange? Is it Intel integrated Audio or is it an external chip? Hence I would like to do something on hardware level ... is this not possible? -- You

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Daniel expressed what I meant: it's often hard to avoid noise on onboard audio chip. Lots of PCs have background noise - nothing really can be done at software level. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

It sounds like the Windows approach of using a noise suppression filter might generally be a good idea. It's likely Microsoft has seen many more laptops and desktops with this same problem. Although I can't help but think that we could still fix this by limiting the volume more (or finding some

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Kai: So you are saying the sound card is buggy on a hardware level? Does this only affect XPS13's or are other Laptops possibly affected too? I guess all that are using the same soundcard? How about communicating this to Dell? Or isn't this their fault? Is the vendor of the sound card to fault?

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Again, if audio quality matters to you, you can also consider a USB DAC (USB "audio card"). Using the onboard audio socket in any PC is often prone to system noise. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

After discussion with Kailang, he concludes that it's likely to be a hardware issue - nothing serious can be done in the software level. If we introduce the workaround, - No more static noise in headset - The headset volume will be drastically decreased, but you can increase the maximum volume

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Kai: Confirmed my assumption, your patch SIGNIFICANTLY lowers the output volume! -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek ALC3246,

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

load-module module-echo-cancel aec_method=webrtc sink_name=cancel.out source_name=cancel.src set-default-source cancel.src set-default-sink cancel.out does not change anything either. To make the hiss disappear I have to mute the hardware output device. Would be glad if someone could point out

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Regarding the second question: The workaround "amixer -c 0 set 'Headphone Mic Boost',0 1" does lower the output volume significantly. If your patch does the same as the workaround, then the output volume would be significantly lower, I have not tested this yet though. -- You received this bug

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

I am not a PA expert, but I guess you need to set the sink instead of source. I am not sure I fully understand your second question, but output volume should remain the same. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Another question: You say your code does the same as the workaround "amixer -c 0 set 'Headphone Mic Boost',0 1" ... so the output volume is decreased too with your patch? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

load-module module-echo-cancel aec_method=webrtc source_name=cancel set-default-source cancel does not improve the situation. The hiss remains unchanged for me. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

I think you should use the webrtc one. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss Status in Dell Sputnik:

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Thanks very much for the code!! Out of interest, how would you achieve the noise cancellation with pulseaudio? I tried load-module module-echo-cancel source_name=test set-default-source test which did not work. A new device appears called "Built-in Audio Analog Stereo (echo cancelled with

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Basically, I did the same thing as "amixer -c 0 set 'Headphone Mic Boost',0 1", and make the mic pin hidden as well. Otherwise, user space tools will change the value. According to Kailang, the "Audio hiss" also happens on Windows - but windows has Noise Suppression filter, so it's not as

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

When you connect the jack you can choose between 3 options normally (with the kernel in [1] only two now)... isn't it somehow possible to operate with microphone disabled by default ... but leave the user the option to use a traditional mircophone? The white noise should then only be triggered

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Yes that solves the issue :-). Could you link me the code changes? But are you sure you can't fix the support for traditional microphones? :-( Would be a sad loss, could you elaborate why this is not possible? -- You received this bug notification because you are a member of Kernel Packages,

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Linux kernel in [1] should solve the issue. However, the jack loses the ability to record via traditional microphone - but I think people nowadays use headset most of the time. [1] http://people.canonical.com/~khfeng/lp1654448-nomic/ -- You received this bug notification because you are a

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

At a guess the cause of the problem may be some kind of headphone volume boost option that's turned on by default, and weirdly turned off by "'Headphone Mic Boost',0 1". This may not be avoidable interference as much as just excessive volume boost turned on by default. -- You received this bug

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Unfortunately that did not work. I can confirm that http://people.canonical.com/~khfeng/lp1654448-artful/ does now remove the 'Headphone Mic Boost' option. However the headphone audio hiss remains, and now we have no workaround... -- You received this bug notification because you are a member

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Yes it disappears! (forgot to run alsamixer as root). -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss Status

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

amixer -c 0 set 'Headphone Mic Boost',0 1 does not work, it says "Headphone Mic Boost" not found, so yes, I am however not familiar with alsamixer. Where would I find "Headphone Mic Boost"? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Does "Headphone Mic Boost" disappear in alsamixer? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss Status in

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

This time there are no KHFENG entries in dmesg. ** Attachment added: "new.txt" https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1654448/+attachment/4900217/+files/new.txt -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Same situation :-(. The hiss is cleary audible, no change. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Updated, please try again. The new kernel disables "Headphone Mic Boost" completely. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek ALC3246,

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

** Attachment added: "dmesg.txt" https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1654448/+attachment/4900166/+files/dmesg.txt -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

** Tags added: 201507-18777 taipei-lab ** Tags added: oem-sru -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Can you attach dmesg with the kernel I built? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss Status in Dell

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Unfortunately the hiss is still there :-(. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss Status in Dell

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Update (again), please try it. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss Status in Dell Sputnik:

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Is it already the new one as of now? I have just tried it and it did not help :-(. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek ALC3246,

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Please try kernels in #44 again, thanks! -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss Status in Dell

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Sorry, I forgot to hook the new quirk function I wrote to the right place, so it's never being called. I'll compile a new kernel soon. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

I confirm Daniel van Vugt, same for me. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss Status in Dell

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

** Tags added: 9350 artful -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss Status in Dell Sputnik: Confirmed

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

@kaihengfeng: Sorry, that kernel did not improve the situation. The bug persists and the same workaround is required. I tested it on a fresh artful installation (9350 model). -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Please try this: http://people.canonical.com/~khfeng/lp1654448-artful/ ** Changed in: linux (Ubuntu) Status: Confirmed => In Progress -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Kai-Heng Feng: Is there anybody still working in this? Are you sure Kailiang noticed this bug? Is there anything else I could do for you to help? ** Changed in: dell-sputnik Status: New => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

/usr/share/pulseaudio/alsa-mixer/paths/analog-input-headphone-mic.conf I just found this from a separate bug thread. This looks interesting. The options for volume are: volume = ignore | merge | off | zero | # What to do with this volume: ignore it, merge it into the device # volume slider,

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

I still haven't figured out how Pulse determines the default levels it forces upon the user at each start of the service. I think it should respect those levels set within ALSA/the system. If Pulse can't respect selected values, then I'd like to know where it gets its default values. That way I

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

I tried blacklisting the snd_hda_codec_realtek module, sound works, but now I can hear the coil whine, depending on the activity of the cpu/gpu. Moving the mouse pointer around is clearly audible etc. -- You received this bug notification because you are a member of Kernel Packages, which is

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Well, the problem might be more noticeable with low-impedance earphones/headphones. So more likely earphones, but possibly also headphones. (<--- This is now guessing) Yes I would agree (and mentioned in comment #37) that the workaround makes audio quieter. That might be the best solution

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

@vanvugt: I can clearly reproduce the problem with headphones too, I do not notice they "hide" anything. I noticed the hiss listening to music so I can always clearly hear it and it becomes very apparent in a quiet environment. On another note, with the workaround in place the audio is way to

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

@kaihengfeng: I found the problem was only really noticeable with earbuds. Headphones tended to hide the problem. Although it's also worth noting the workaround 'amixer -c 0 set 'Headphone Mic Boost',0 1' sounds like it's working because it actually reduces the audio output volume/gain. With the

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Great, Kailiang has Launchpad account =) @Kailiang I personally cannot reproduce the issue on my $10 Logitech headphone, maybe this bug can only be reproduced on more beefy headphone. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Sorry, my bad, ALC256 doesn't have aaloop at first place, so my kernel does nothing =( I'll ask Realtek codec guy about this issue. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

Confirming Daniel van Vugt: The kernel http://people.canonical.com/~khfeng/lp1654448/ does not improve the situation. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

** Also affects: dell-sputnik Importance: Undecided Status: New -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1654448 Title: XPS 13 9360 and 9350, Realtek ALC3246, Headphone

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

@vanvugt: The earphones I tested (Bose Soundtrue Ultra) are Android ones. I have also tested headphones with no microphone (Sennheiser HD202). @kaihengfeng: I will install Ubuntu from scratch in order to test your kernelsl -- You received this bug notification because you are a member of Kernel

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

^^^ Confirmed on an XPS 13 9350 too. And the 'Headphone Mic Boost' workaround works. Although like others, I find that concerning since it should in theory make the problem worse or make no difference. Also confirmed the problem persists with: * 3-contact earphones (Sony) * 4-contact Apple

[Kernel-packages] [Bug 1654448] Re: XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss

** Summary changed: - XPS 13 9360, Realtek ALC3246, Headphone audio hiss + XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.