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10 Posts

12-14-2020

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Re:Yoga C930 audio on Linux

2020-12-17, 21:38 PM

Amazing!!  Thanks so much for the update.  DaveOber, hopefully this means a BIOS update (or even a test one) can move forward for the C930.  Incredibly exciting news!

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5 Posts

12-17-2020

Germany

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Re:Yoga C930 audio on Linux

2020-12-18, 10:30 AM

Hi again,

 

I'm afraid I have to go back a bit on my previous statement. It looks like something is still not quite right with the bass. I recorded the same audio thrice at maximum volume.

 

The first one is the updated BIOS using the Lenovo-Kernel, the second one is the updated BIOS without the Lenovo-Kernel (this is how it was before the update), the third one is Windows.

 

Waveform audio

 

It's quite clearly visible that there has been an improvement, and I'm pretty sure the bass-element is doing something now. But it's still not as loud and dynamic as under Windows. The spectogram confirms that the missing frequencies seem to be around 20-3000Hz:

 

Spectogram

 

I hope this helps getting the last few issues out of the way.

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10 Posts

12-14-2020

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Re:Yoga C930 audio on Linux

2020-12-18, 13:59 PM

I think that is because Dolby Advanced Audio drivers don't exist for Linux.  Could this simply be an equalizer issue?  Do you have PulseAudio/PulseEffects installed?  SoundPimp has a free trial and may be more advanced.

 

instructions:

https://stackoverflow.com/questions/27122564/which-version-of-linux-has-support-for-dolby-advanced-audio-v2

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5 Posts

12-17-2020

Germany

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Re:Yoga C930 audio on Linux

2020-12-19, 8:53 AM

Hi,

 

thanks for the idea! I've played around with PulseEffects for a bit, but unfortunately I still couldn't get it to the same level of audio quality as under Windows.

 

It improved things a bit when I used the Dolby-preset and boosted the bass a bit, but there's just some of the richness missing. It still might be a driver issue. Maybe they use a lot of software-magic to improve the sound on Windows. But I really don't know.

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10 Posts

12-14-2020

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Re:Yoga C930 audio on Linux

2020-12-19, 20:53 PM

DaveOber, is there any other info you need from Nyankas to help debug?

 

Nyankas, are you sure all speakers are enabled?  Is there any difference in Alsamixer?  (I'm not sure whether it would register any difference with additional speakers)

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5 Posts

12-17-2020

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  • Message 46 of 78

Re:Yoga C930 audio on Linux

2020-12-19, 23:11 PM

Hi,

 

Alsamixer looks pretty much the same.

 

I'm pretty sure all speakers are working. The soundbar is definitely working, as always. The two speakers underneath the chassis work only with the new kernel. And unless these have quite a lot of bass, the bass speaker seems to be working as well.

 

My current theory is, that it's indeed some sort of software problem. Seeing that the loudness at peaks seems to be around the same level as under Windows, I'd imagine all speakers are firing. Just not in the same way as under Windows.

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2 Posts

12-23-2020

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Re:Yoga C930 audio on Linux

2020-12-23, 2:03 AM

I am glad to report I was able to follow the instructions from these posts and update to this test bios.

 

The speakers are working great and I did not need to install the custom kernel for them to work either.

 

--

Linux yoga 5.8.0-33-generic #36-Ubuntu SMP Wed Dec 9 09:14:40 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

--

 

Update:
Ive installed the kernel and the sound is a even better :)

 

The audio does not sound as good as windows as noted above but it sure is a lot better then it was for sure.

 

Thank you!

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2 Posts

12-23-2020

Georgia

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  • Message 48 of 78

Re:Yoga C930 audio on Linux

2020-12-23, 8:53 AM

Finally! Thank you, everyone.

Can anyone in charge make instructions official?

https://wiki.archlinux.org/index.php/Lenovo_Yoga_c940

This wiki also needs to be updated.

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676 Posts

07-22-2019

Canada

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  • Message 49 of 78

Re:Yoga C930 audio on Linux

2020-12-24, 1:58 AM

Hi,

 

We're looking into whether if and how we could release this officially but it's looking really tricky. The problem is with the changes implemented they will impact Windows - both audio performance and power consumption. Understandably the firmware team can't do that (and the reality is they have limited resources to spend on this as it's not an officially Linux supported platform - we've been really lucky that the firmware team have been happy to dig into this at all).

 

It's going to be hard for me to push for a solution for this but I'll see if we can find a way to get it resolved but for now I'm afraid assume it's going to be an unofficial (and unsupported) release. Hopefully it at least gives you a better experience in the mean time but I appreciate it's frustrating if it's not a long term or supported solution.

 

Thanks

Mark

 

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12 Posts

10-31-2017

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  • Message 50 of 78

Re:Yoga C930 audio on Linux

2020-12-24, 2:11 AM

Anyway we could get a version for C930, given that was my original request? 

 

Thank you again to you and the firmware team for this.

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