Ubuntu 26.04 Failed to Boot: boot micmute setting an led's brightness failed (-5)

I've been using Ubuntu 26.04 daily build on my Dell 3585 and there is a bug causes my machine fail to boot. The system stuck at boot session with this following error message:

boot micmute setting an led's brightness failed (-5)

I've updated the system and sadly, the bug hasn't been solved. Luckily, I've found a quite simple solution from internet.

sudo nano /etc/default/grub

Add "module_blacklist=dell_laptop" parameter to the default grub parameter:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash module_blacklist=dell_laptop"

Save the file, update grub:

sudo update-grub

Last, reboot your system.

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