[Solved] No sound on HP elitebook laptop with conexant cx20724 codec

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ltrk:
Hi

I can't get audio to work on my 4.14.10-tinycore. I have read Rich's alsa setup guide but no luck.
Sorry for the long post but for some reason I cant attach the files so I pasted them.
I understand that for intel HD audio the model must be specified as a parameter but I cant find an entry for conexant cx20724 in the models file.
aplay device list:

--- Code: ---aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: CX20724 Analog [CX20724 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
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
card 0: PCH [HDA Intel PCH], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0

--- End code ---

Here is my modules list

--- Code: ---lsmod | grep snd
snd_hda_codec_hdmi 28672 1
snd_hda_codec_conexant 12288 1
snd_hda_codec_generic 40960 1 snd_hda_codec_conexant
snd_hda_intel 24576 0
snd_hda_codec 57344 4 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_codec_generic,snd_hda_intel
snd_hda_core 36864 5 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_codec_generic,snd_hda_intel,snd_hda_codec
snd_hwdep 12288 1 snd_hda_codec
snd_pcm 49152 4 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_core
snd_timer 20480 1 snd_pcm
snd 36864 8 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_codec_generic,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
soundcore 12288 1 snd

--- End code ---

amixer output:

--- Code: ---Simple mixer control 'Master',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 74
Mono: Playback 64 [86%] [-10.00dB] [on]
Simple mixer control 'Headphone',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 74
Mono:
Front Left: Playback 74 [100%] [0.00dB] [on]
Front Right: Playback 74 [100%] [0.00dB] [on]
Simple mixer control 'Speaker+LO',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 74
Mono:
Front Left: Playback 74 [100%] [0.00dB] [on]
Front Right: Playback 74 [100%] [0.00dB] [on]
Simple mixer control 'PCM',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 255
Mono:
Front Left: Playback 255 [100%] [0.00dB]
Front Right: Playback 255 [100%] [0.00dB]
Simple mixer control 'Line',0
Capabilities: cswitch cswitch-joined cswitch-exclusive
Capture exclusive group: 0
Capture channels: Mono
Mono: Capture [off]
Simple mixer control 'Line Boost',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 3
Front Left: 0 [0%] [0.00dB]
Front Right: 0 [0%] [0.00dB]
Simple mixer control 'Mic',0
Capabilities: cswitch cswitch-joined cswitch-exclusive
Capture exclusive group: 0
Capture channels: Mono
Mono: Capture [on]
Simple mixer control 'Mic Boost',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 3
Front Left: 0 [0%] [0.00dB]
Front Right: 0 [0%] [0.00dB]
Simple mixer control 'IEC958',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'IEC958',1
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'IEC958',2
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'Beep',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 7
Mono: Playback 3 [43%] [-16.00dB] [on]
Simple mixer control 'Capture',0
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right
Limits: Capture 0 - 80
Front Left: Capture 0 [0%] [-74.00dB] [off]
Front Right: Capture 0 [0%] [-74.00dB] [off]
Simple mixer control 'Auto-Mute Mode',0
Capabilities: enum
Items: 'Disabled' 'Speaker Only' 'Line Out+Speaker'
Item0: 'Line Out+Speaker'
Simple mixer control 'Internal Mic',0
Capabilities: cswitch cswitch-joined cswitch-exclusive
Capture exclusive group: 0
Capture channels: Mono
Mono: Capture [off]
Simple mixer control 'Internal Mic Boost',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 3
Front Left: 0 [0%] [0.00dB]
Front Right: 0 [0%] [0.00dB]
Simple mixer control 'Mute-LED Mode',0
Capabilities: enum
Items: 'On' 'Off' 'Follow Master'
Item0: 'Follow Master'

--- End code ---

ltrk:
I'm also posting snippets of alsa-info, I could not paste the whole file due to size limits. Pulse audio reports a confifguration problem and does not run but I thought I will first get alsa working and then reinstall pulse audio

--- Code: ---!!ALSA/HDA dmesg
!!--------------

random: crng init done
snd_hda_intel 0000:00:1f.3: enabling device (0000 -> 0002)
snd_hda_intel 0000:00:1f.3: failed to add i915 component master (-19)
snd_hda_codec_conexant hdaudioC0D0: CX20724: BIOS auto-probing.
snd_hda_codec_conexant hdaudioC0D0: action: 0 gpio_led: 0
snd_hda_codec_conexant hdaudioC0D0: autoconfig for CX20724: line_outs=1 (0x16/0x0/0x0/0x0/0x0) type:line
snd_hda_codec_conexant hdaudioC0D0: speaker_outs=1 (0x17/0x0/0x0/0x0/0x0)
snd_hda_codec_conexant hdaudioC0D0: hp_outs=1 (0x1d/0x0/0x0/0x0/0x0)
snd_hda_codec_conexant hdaudioC0D0: mono: mono_out=0x0
snd_hda_codec_conexant hdaudioC0D0: inputs:
snd_hda_codec_conexant hdaudioC0D0: Mic=0x19
snd_hda_codec_conexant hdaudioC0D0: Internal Mic=0x1a
snd_hda_codec_conexant hdaudioC0D0: Line=0x18
snd_hda_codec_conexant hdaudioC0D0: Enable sync_write for stable communication
snd_hda_codec_conexant hdaudioC0D0: action: 1 gpio_led: 0
snd_hda_codec_conexant hdaudioC0D0: action: 2 gpio_led: 0
snd_hda_codec_hdmi hdaudioC0D2: No i915 binding for Intel HDMI/DP codec
snd_hda_codec_hdmi hdaudioC0D2: No i915 binding for Intel HDMI/DP codec
input: HDA Intel PCH Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input16
input: HDA Intel PCH Line as /devices/pci0000:00/0000:00:1f.3/sound/card0/input17
input: HDA Intel PCH Dock Line Out as /devices/pci0000:00/0000:00:1f.3/sound/card0/input18
input: HDA Intel PCH Headphone as /devices/pci0000:00/0000:00:1f.3/sound/card0/input19
input: HDA Intel PCH HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input20
wl: loading out-of-tree module taints kernel.
--
wlan0: associated
snd_hda_codec_conexant hdaudioC0D0: action: 2 gpio_led: 1
snd_hda_codec_conexant hdaudioC0D0: action: 2 gpio_led: 1
snd_hda_codec_conexant hdaudioC0D0: action: 2 gpio_led: 0
snd_hda_codec_conexant hdaudioC0D0: action: 2 gpio_led: 0
pavucontrol[11287]: segfault at 8be58962 ip b6fb465f sp bf98e9d0 error 4 in libgobject-2.0.so.0.5200.3[b6f90000+30000]
snd_hda_codec_conexant hdaudioC0D0: action: 2 gpio_led: 0
snd_hda_codec_conexant hdaudioC0D0: action: 2 gpio_led: 0
snd_hda_codec_conexant hdaudioC0D0: action: 2 gpio_led: 0

--- End code ---

Juanito:
Have you tried rebooting with no alsa extensions loaded “onboot” and then loading (in that order) graphics-KERNEL alsa-config and alsa?

ltrk:
I did as you said, deleting alsa extensions and rebooting. Then installing one module and rebooting before installing the next one. But no change in sound

aus9:

--- Quote ---I understand that for intel HD audio the model must be specified as a parameter
--- End quote ---
Not "must". Maybe needed if something is not working or a tweak or quirk is required.

Please name the exact model of Elitebook.

It appears some may have a bios setting that affects sound as per
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1536948

2) Do you want sound to come out of analog or HDMI or both?

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