System76 Lemur Pro 3.5mm jack fix on Fedora

I was having an issue with my System76 Lemur Pro headphone jack. The issues were static noice and high pitch sound. I don’t know if this was an issue with Pop!_OS since the first thing I did when I received the laptop was to install Fedora 32.

The quick fix is adding this line snd_hda_intel.model=headset-mode-no-hp-mic to the end of GRUB_CMDLINE_LINUX line in /etc/default/grub. Use your preferred text editor to edit the gub file.

# Default value
GRUB_CMDLINE_LINUX="resume=/dev/mapper/fedora_localhost--live-swap rd.lvm.lv=fedora_localhost-live/root rd.luks.uuid=luks-ef02d4a7-baef-4325-9426-7797e035c1ea rd.lvm.lv=fedora_localhost-live/swap rhgb quiet"


# Updated line
GRUB_CMDLINE_LINUX="resume=/dev/mapper/fedora_localhost--live-swap rd.lvm.lv=fedora_localhost-live/root rd.luks.uuid=luks-ef02d4a7-baef-4325-9426-7797e035c1ea rd.lvm.lv=fedora_localhost-live/swap rhgb quiet snd_hda_intel.model=headset-mode-no-hp-mic"

Then execute the command below to make this permanent. Reboot when done.

grub2-mkconfig -o /boot/efi/EFI/fedora/grub.cfg

reboot

I just want to document this. I stumbled across this the solution on Arch Wiki then to Reddit. Cheers!

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