Did you remove BOTH alsa-driver-kmp-desktop AND remove alsa-driver-unstable-kmp-desktop like I asked, before re-installing alsa-driver-kmp-desktop ? If you did not follow that sequence, then it won’t work.
Did you reboot as asked ?
You are certain the hardware is good ? (ie works under another OS ? )
You could also try forcing some model options upon booting to see if that helps (although theoretically it should not be necessary with 1.0.23 of alsa). For the IDT 92HD73C1X5
that is in your dell, the model options from the HD-Audio-Models.txt file are:
STAC92HD73*
===========
ref Reference board
no-jd BIOS setup but without jack-detection
intel Intel DG45* mobos
dell-m6-amic Dell desktops/laptops with analog mics
dell-m6-dmic Dell desktops/laptops with digital mics
dell-m6 Dell desktops/laptops with both type of mics
dell-eq Dell desktops/laptops
alienware Alienware M17x
auto BIOS setup (default)
For example, lets say you wish to try te “dell-m6” option (because I have read that works for some Ubuntu users for the headset). To do that, add this line to the START of your /etc/modprobe.d/50-sound.conf file:
options snd-hda-intel model=dell-m6
such that the file now looks like:
options snd-hda-intel model=dell-m6
options snd slots=snd-hda-intel,snd-hda-intel
# u1Nb.q5iJRtIng9B:5 Series/3400 Series Chipset High Definition Audio
alias snd-card-0 snd-hda-intel
# 2Oa+.4DShUUubpP6:R700 Audio Device [Radeon HD 4000 Series]
alias snd-card-1 snd-hda-intel
then save that, and restart your alsa sound driver with:
su -c 'rcalsasound restart'
enter your root password when prompted for a password and test. If using KDE and asked if you wish to delete an old configuration say YES. We don’t want it. Note in KDE you should type ‘kmix’ as a regular user to restart your mixer for testing. In gnome it will be another mixer, … maybe alsamixer?
If “dell-m6” does not work, try another option model from that list. Say 'dell-eq". To do that simply replace “dell-m6” from the modified /etc/modprobe.d/50-sound.conf file with “dell-eq”, save the change, restart alsa as described above, restart your mixer, and test. Do that for each model option until your headset works !