Comment 0 for bug 1641028

Using the latest Ubuntu 16.10 amd64 on a new ASUS ZenBook UX390UAK.

$ dmesg | egrep -i 'audio|sound'
[ 22.315357] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[ 22.346209] snd_hda_codec_realtek hdaudioC0D0: autoconfig for ALC295: line_outs=2 (0x14/0x17/0x0/0x0/0x0) type:speaker
[ 22.346211] snd_hda_codec_realtek hdaudioC0D0: speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[ 22.346212] snd_hda_codec_realtek hdaudioC0D0: hp_outs=1 (0x21/0x0/0x0/0x0/0x0)
[ 22.346212] snd_hda_codec_realtek hdaudioC0D0: mono: mono_out=0x0
[ 22.346213] snd_hda_codec_realtek hdaudioC0D0: inputs:
[ 22.346214] snd_hda_codec_realtek hdaudioC0D0: Mic=0x12
[ 22.360623] input: HDA Intel PCH Headphone as /devices/pci0000:00/0000:00:1f.3/sound/card0/input8
[ 22.360677] input: HDA Intel PCH HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input10
[ 22.360724] input: HDA Intel PCH HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input11
[ 22.360769] input: HDA Intel PCH HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input12
$ lspci | egrep -i 'audio|sound'
00:1f.3 Audio device: Intel Corporation Device 9d71 (rev 21)

The onboard sound device generally works perfectly, but the volume level can only be set to 100% or mute.

Using the keyboard volume control hotkeys in Unity shows the overlay and a decrease/increase in the volume indicator, but the volume remains at its maximum. The mute hotkey works fine. Same in e.g. alsamixer, I can move the Master channel volume to anything between 0 and 100 but the volume remains constantly at maximum unless I mute the channel.

Individual applications with their own volume controls work fine.

Plugging in a USB headset and adjusting the volume levels for that device works fine.