cat /proc/asound/cards
 0 [Intel          ]: HDA-Intel - HDA Intel
                      HDA Intel at 0xf2420000 irq 45
 1 [NVidia         ]: HDA-Intel - HDA NVidia
                      HDA NVidia at 0xcdefc000 irq 16
29 [ThinkPadEC     ]: ThinkPad EC - ThinkPad Console Audio Control
                      ThinkPad Console Audio Control at EC reg 0x30, fw 6IHT41WW-1.16


alsa force-reload
Unloading ALSA sound driver modules: snd-hda-codec-hdmi snd-hda-codec-conexant snd-hda-intel snd-hda-codec snd-hwdep snd-pcm-oss snd-pcm snd-page-alloc snd-mixer-oss snd-seq snd-timer snd-seq-device (failed: modules still loaded: snd-hda-codec-hdmi snd-hda-codec-conexant snd-hda-intel snd-hda-codec snd-hwdep snd-pcm snd-page-alloc snd-timer).
Loading ALSA sound driver modules: snd-hda-codec-hdmi snd-hda-codec-conexant snd-hda-intel snd-hda-codec snd-hwdep snd-pcm-oss snd-pcm snd-page-alloc snd-mixer-oss snd-seq snd-timer snd-seq-device.