ThinkPad T470p snd-hda-intel: headphones work but no onboard sound

My laptop is running a clean install of focal fossa 20.04 and I can't hear anything from my onboard speakers. Fortunately, my headphones do work. The aux port is okay.

bingo@pinkdad:~$ inxi -SMA System: Host: pinkdad Kernel: 5.4.0-26-generic x86_64 bits: 64 Desktop: Gnome 3.36.1 Distro: Ubuntu 20.04 LTS (Focal Fossa) Machine: Type: Laptop System: LENOVO product: 20J6CTO1WW v: ThinkPad T470p serial: <superuser/root required> Mobo: LENOVO model: 20J6CTO1WW serial: <superuser/root required> UEFI: LENOVO v: R0FET51W (1.31 ) date: 01/07/2020 Audio: Device-1: Intel CM238 HD Audio driver: snd_hda_intel Sound Server: ALSA v: k5.4.0-26-generic 

I've been playing with alsamixer and pavucontrol and the settings GUI to make sure nothing is muted and it's all turned up. This seems to be affected by modifying sudo vim /etc/modprobe.d/alsa-base.conf appropriately and rebooting.

Here are the options I've tried:

• options snd-hda-intel model=generic
• options snd-hda-intel model=ALC298
• options snd-hda-intel model=auto

No success yet on my new install of 20.04. Any help / ideas here so appreciated. All worked well on previous versions of Ubuntu.

1 Answer

Add this line -

options snd-hda-intel model=auto

at the end of

/etc/modprobe.d/alsa-base.conf

and reboot the system.

it started working for me. Apparently, we need to point out alsamixer to use auto-detection between speaker and headphones.