Como tira-teima, traga ao tópico o resultado para:
lsmod | grep wmi
dell_wmi 16384 0
sparse_keymap 16384 1 dell_wmi
dell_smbios 16384 3 dell_wmi,dell_led,dell_laptop
snd_rawmidi 32768 1 snd_seq_midi
snd_seq_device 16384 3 snd_seq,snd_rawmidi,snd_seq_midi
snd 77824 29 snd_compress,snd_hda_intel,snd_hwdep,snd_seq,snd_hda_codec,snd_timer,snd_rawmidi,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_seq_device,snd_hda_codec_realtek,snd_soc_core,snd_pcm
wmi 16384 2 dell_wmi,dell_led
video 40960 3 dell_wmi,dell_laptop,i915