Hey there, sorry to hear you're stuck with no built-in speaker sound on your LG Gram 2023 after switching to Ubuntu 23.04. Since headphones and Bluetooth work fine, the hardware is definitely good—let's go through some targeted fixes that have resolved this exact issue for other users with similar setups:

• Double-check your sound output selection
  First things first: Open your system Settings → Sound, and make sure the output device is set to your laptop's built-in speaker (not headphones/Bluetooth). Sometimes Ubuntu sticks with the last used device even after you disconnect it. You can also click the test button next to each device to confirm which one is producing sound.

• Reload the ALSA audio driver
  This is a quick fix that often resolves temporary glitches. Open a terminal (Ctrl+Alt+T) and run these commands one by one:

  sudo alsa force-reload
  

  Then restart the PulseAudio service:

  systemctl --user restart pulseaudio
  

  Go back to sound settings and test the speaker again after this.

• Tweak the ALSA configuration for LG Gram
  The LG Gram series has specific audio chip quirks that need a small config tweak. Open the ALSA base config file with:

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

  Scroll to the very end of the file and add this line:

  options snd-hda-intel model=lg-gram
  

  Save the file (press Ctrl+O, hit Enter, then Ctrl+X to exit nano), then restart your laptop. This should tell the audio driver to use the correct profile for your speaker hardware.

• Update your kernel
  Ubuntu 23.04's default kernel might not have full support for the 13th Gen Intel CPU's audio components. Let's update to a newer kernel:
  First, update your package lists:

  sudo apt update && sudo apt upgrade -y
  

  Then install the latest hardware-enablement kernel:

  sudo apt install linux-generic-hwe-22.04 -y
  

  Reboot your system after installation—newer kernels often fix hardware compatibility gaps.

• Reset PulseAudio configuration
  If PulseAudio has corrupted config files, resetting them can help. Run this command to back up your current config:

  mv ~/.config/pulse ~/.config/pulse.bak
  

  Then restart the PulseAudio service:

  systemctl --user restart pulseaudio
  

  Ubuntu will generate a fresh set of config files automatically. Test the speaker once this is done.

If none of these steps work, could you share the output of the aplay -l command in the terminal? That will show us the exact audio hardware detected by Ubuntu, which can help narrow down the issue further.

备注：内容来源于stack exchange，提问作者Mercy