Hi,

I tried setting options snd-hda-
  intel model=alc255-acer, and it worked for me after a reboot.

Let me know if it works for anyone else

On Sat, 22 May, 2021, 13:09 Kreaninw, <email address hidden> wrote:

> Tried this again on Ubuntu 21.04. There is still no sound out of the
> box.
>
> I then compiled the alsa-topology-conf as suggested here:
> https://gist.github.com/crojewsk/4e6382bfb0dbfaaf60513174211f29cb
> #enabling-the-configuration
> <https://gist.github.com/crojewsk/4e6382bfb0dbfaaf60513174211f29cb#enabling-the-configuration>
>
> And enabled the options snd_intel_dspcfg dsp_driver=2.
>
> But still no luck. I believe that I will have to do the NHLT overriding
> for it to work. However, that's beyond my ability. The page suggested
> that we should ask Intel developers for help to obtain the correct NHLT
> binary.
>
> --
> You received this bug notification because you are subscribed to a
> duplicate bug report (1789154).
> https://bugs.launchpad.net/bugs/1523100
>
> Title:
>   Alsa not detecting internal microphone [ALC255] (Realtek)
>
> Status in alsa-driver package in Ubuntu:
>   Confirmed
>
> Bug description:
>   I've just installed Ubuntu 16.04 alongside Windows 10 on a 64bit Acer
>   Aspire VN7-792G and noticed, that the internal microphone doesn't
>   work. The computer has been released a couple of months ago and it's
>   Intel Skylake -based with a Sunrise Point -based motherboard.
>
>   INFO: The problem exists in Ubuntu 15.10 too, only microphone jack
>   detected. Currently using Ubuntu 16.04 for proper hardware support.
>
>   Alsa reports the audio device to be:
>
>   Card: HDA Intel PCH
>   Chip: Intel Skylake HDMI
>
>   The speakers are working fine, but both alsamixer and pavucontrol
>   (Pulseaudio Volume Control) raport the unplugged external microphone
>   connector as the only sound input.
>
>   I have tried many of the alsa model configurations (options snd-hda-
>   intel model=something) without success, alsa finds only the microphone
>   jack, which works fine when I plug an external microphone in it.
>
>   Here's some info:
>
>   lspci | grep -I audio:
>
>   00:1f.3 Multimedia audio controller: Intel Corporation Sunrise Point-H
>   HD Audio (rev 31)
>
>   cat /proc/asound/cards:
>
>   0 [PCH            ]: HDA-Intel - HDA Intel PCH
>                               HDA Intel PCH at 0x84320000 irq 128
>
>   And a clip from dmesg | grep snd:
>
>   [    3.019164] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops
> i915_audio_component_bind_ops [i915])
>   [    3.047505] snd_hda_codec_realtek hdaudioC0D0: autoconfig for ALC255:
> line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:speaker
>   [    3.047508] snd_hda_codec_realtek hdaudioC0D0:    speaker_outs=0
> (0x0/0x0/0x0/0x0/0x0)
>   [    3.047510] snd_hda_codec_realtek hdaudioC0D0:    hp_outs=1
> (0x21/0x0/0x0/0x0/0x0)
>   [    3.047511] snd_hda_codec_realtek hdaudioC0D0:    mono: mono_out=0x0
>   [    3.047512] snd_hda_codec_realtek hdaudioC0D0:    dig-out=0x1e/0x0
>   [    3.047512] snd_hda_codec_realtek hdaudioC0D0:    inputs:
>   [    3.047514] snd_hda_codec_realtek hdaudioC0D0:      Mic=0x1a
>
>   One problem is that I can't find any model options (options snd-hda-
>   intel model=something) or other parameters for the card's model
>   (ALC255), I suppose this issue is relatively new.
>
>   /Dennis
>   ---
>   ApportVersion: 2.19.2-0ubuntu6
>   Architecture: amd64
>   AudioDevicesInUse:
>    USER        PID ACCESS COMMAND
>    /dev/snd/controlC0:  dennis     1180 F.... pulseaudio
>   CurrentDesktop: GNOME
>   DistroRelease: Ubuntu 16.04
>   InstallationDate: Installed on 2015-11-11 (23 days ago)
>   InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Alpha amd64
> (20151110)
>   Package: alsa-driver (not installed)
>   ProcVersionSignature: Ubuntu 4.2.0-19.23-generic 4.2.6
>   Tags:  xenial
>   Uname: Linux 4.2.0-19-generic x86_64
>   UpgradeStatus: No upgrade log present (probably fresh install)
>   UserGroups: adm bumblebee cdrom dip lpadmin plugdev sambashare sudo
>   _MarkForUpload: True
>   dmi.bios.date: 09/25/2015
>   dmi.bios.vendor: Insyde Corp.
>   dmi.bios.version: V1.02
>   dmi.board.asset.tag: No Asset Tag
>   dmi.board.name: Aspire VN7-792G
>   dmi.board.vendor: Acer
>   dmi.board.version: V1.02
>   dmi.chassis.asset.tag: No Asset Tag
>   dmi.chassis.type: 10
>   dmi.chassis.vendor: Acer
>   dmi.chassis.version: V1.02
>   dmi.modalias:
> dmi:bvnInsydeCorp.:bvrV1.02:bd09/25/2015:svnAcer:pnAspireVN7-792G:pvrV1.02:rvnAcer:rnAspireVN7-792G:rvrV1.02:cvnAcer:ct10:cvrV1.02:
>   dmi.product.name: Aspire VN7-792G
>   dmi.product.version: V1.02
>   dmi.sys.vendor: Acer
>
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>
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