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Since installing Zorin OS (based on Ubuntu Jammy), I have no audio
functionality on my INSYS 11.6p GW1-W116 N4020 laptop. Despite extensive
troubleshooting, the kernel consistently reports "Unknown kernel command
line parameters" for various boot options, which appears to be
preventing the Sound Open Firmware (SOF) audio driver from fully
initializing.

Problem Details:

No Audio Output: aplay -l consistently reports "no soundcards found..." 
(nenhuma placa de som encontrada...). alsamixer also fails to open, stating 
"cannot find card '0'".
Kernel Command Line Parsing Error: The primary symptom in dmesg is the 
persistent error message: Unknown kernel command line parameters "splash 
sof_debug BOOT_IMAGE=/boot/vmlinuz-6.8.0-XX-generic", will be passed to user 
space. This error occurs regardless of how the parameters are set (via GRUB, 
manual GRUB edit, or modprobe options) and even affects fundamental parameters 
like "splash" and the BOOT_IMAGE path.
Hardware:
Laptop Model: INSYS 11.6p GW1-W116 N4020
Processor: Intel Celeron N4020 (Gemini Lake Refresh)
Audio Controller: Intel Corporation Celeron/Pentium Silver Processor High 
Definition Audio [8086:3198]
Audio Codec: ESSX8336 (Everest Sound Device, I2S codec)
Firmware Version: EM-IG218_v2.0.8 (from DMI info)
Kernel Versions Tested:
6.8.0-59-generic (initial and reinstalled)
6.8.0-57-generic (older version, tested from GRUB advanced options)
The issue persists identically on both kernel versions.
Troubleshooting Steps Already Performed:

Modified /etc/default/grub: Set GRUB_CMDLINE_LINUX_DEFAULT="quiet splash 
snd_intel_dspcfg.dsp_driver=1 sof_debug".
Updated GRUB: Ran sudo update-grub multiple times.
Manual GRUB Edit at Boot: Edited the linux line at GRUB menu (E key) to ensure 
correct spacing and parameters (ro quiet splash snd_intel_dspcfg.dsp_driver=1 
sof_debug). The dmesg command line confirmed the edit was applied, but the 
"Unknown parameters" error persisted.
Reinstalled Kernel: Reinstalled linux-image-6.8.0-59-generic, 
linux-modules-6.8.0-59-generic, and linux-headers-6.8.0-59-generic via sudo apt 
install --reinstall.
Forced Module Option: Created /etc/modprobe.d/snd_intel_dspcfg.conf with 
options snd_intel_dspcfg dsp_driver=1, then ran sudo update-initramfs -u -k all.
Checked BIOS/UEFI Settings: Confirmed there are no specific "OS Type" or "Audio 
Type" settings, and integrated audio is enabled.
alsa-info.sh analysis: Showed that relevant SOF modules (snd_sof, 
snd_sof_pci_intel_apl, snd_soc_es8316, snd_intel_dspcfg, etc.) are listed as 
loaded, but ALSA still reports no sound cards, indicating modules are loading 
but not successfully initializing the hardware.

Alsa-info result:
https://alsa-project.org/db/?f=fa3a6974ab7937023a4e2da1a0672be5fd2a7b46

** Affects: ubuntu
     Importance: Undecided
         Status: New

-- 
Kernel 6.8.x fails to parse command line on INSYS 11.6p GW1-W116 N4020 (Intel 
N4020 / ESSX8336), leading to no audio
https://bugs.launchpad.net/bugs/2111644
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