Note: This probably isn’t limited just to the Dell Studio 1558. For those who tried the HOWTO at https://help.ubuntu.com/ and ended up with headphones and microphones that don’t work, here’s how you do it: sudo nano /etc/modprobe.d/alsa-base.conf Into that file, insert options snd-hda-intel model=dell-m6-dmic. (Some forum posts will tell you to use dell-eq, but that [...]