8821cu.conf ----------- blacklist rtw88_8821cu options 8821cu rtw_led_ctrl=1 alsa-base.conf -------------- options snd-hda-intel model=imac27 broadcom-wl.conf ---------------- disable-evbug.conf ------------------ blacklist evbug nobeep.conf ----------- blacklist pcspkr snd_pcsp.conf ------------- blacklist snd_pcsp