I got a new LG Gram laptop (see specs -> 1) and immediately replaced windows with Ubuntu 20.04 LTS. I had no issues with installation other than I have no sound. I am aware of many threads discussing this and I have been troubleshooting for hours. Nothing thus far has worked for me hence why I am asking this question to a community. I will provide as much information as I can regarding what "solutions" I have already tried. Hopefully someone can help me.
Solution 1
Firstly I ran through the troubleshooting steps built into Ubuntu's help application:
- Checked in system settings that sound was not muted
- Check the correct sound device was connected (I only had the option "Speaker-sof-hda-dsp")
- Executed
lspci -v
which returned the following output relevant to audio:
00:1f.3 Multimedia audio controller: Intel Corporation Device a0c8 (rev 20)
Subsystem: LG Electronics, Inc. Device 0400
Flags: bus master, fast devsel, latency 64, IRQ 166
Memory at 603d188000 (64-bit, non-prefetchable) [size=16K]
Memory at 603d000000 (64-bit, non-prefetchable) [size=1M]
Capabilities: [50] Power Management version 3
Capabilities: [80] Vendor Specific Information: Len=14 <?>
Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
Kernel driver in use: sof-audio-pci
Kernel modules: snd_hda_intel, snd_sof_pci
I noticed hear that the Kernel driver in use could potentially be set to snd_hda_intel
so investigated this.
Solution 2
- I tried to reinstall
pulseaudio
andalsa
to no avail,sudo apt-get install --reinstall alsa-base pulseaudio
&sudo alsa force-reload
. - I checked in
alsamixer
that nothing was muted and tried playing around with manually changing the system sound card but still no sound.
Screen capture of AlsaMixer information
Solution 3
I opened sudo gedit /etc/default/grub
and changed:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
to
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash snd_hda_intel.dmic_detect=0"
After this I executed sudo update-grub
and rebooted my system. I could confirm the driver was changed using aplay -l
but I still had no sound. I gathered more information using modinfo snd_hda_intel
:
parm: dmic_detect:Allow DSP driver selection (bypass this driver) (0=off, 1=on) (default=1); deprecated, use snd-intel-dspcfg.dsp_driver option instead (bool)
Also modinfo snd_intel_dspcfg
provided:
parm: dsp_driver:Force the DSP driver for Intel DSP (0=auto, 1=legacy, 2=SST, 3=SOF) (int)
Following another thread I also added snd_intel_dspcfg.dsp_driver=1
to GRUB_CMDLINE_LINUX_DEFAULT
continuing to update grub and reboot. Still nothing.
Solution 4
First I reset the solution 3, then I performed the following:
- Added
options snd-hda-intel dmic_detect=0
toetc/modprobe.d/alsa-base.conf
. - Added
blacklist snd_soc_skl
toetc/modprobe.d/blacklist.conf
. - Reboot
Still no luck. So I have undone these changes for now.
Further Information
User:~$ inxi -SMA
System: Host: Ryan-Ubuntu-Laptop Kernel: 5.8.0-43-generic x86_64 bits: 64 Desktop: Gnome 3.36.4
Distro: Ubuntu 20.04.2 LTS (Focal Fossa)
Machine: Type: Laptop System: LG product: 16Z90P-K.AA78A1 v: 0.1 serial: <superuser/root required>
Mobo: LG model: 16Z90P v: FAB1 serial: <superuser/root required> UEFI: Phoenix v: T2ZF0250 X64
date: 01/04/2021
Audio: Device-1: Intel driver: sof-audio-pci
Sound Server: ALSA v: k5.8.0-43-generic
Any help at all would be much appreciated as I want to get the system up and running to work on.