I can now confirm that compiling alsa drivers is not necessary on the Dell Latitude D630. Installing linux-backports-modules and adding "options snd-hda-intel model=dell-m42" in /etc/modprobe.d/alsa-base activates sound at a stable volume. Hibernate and sleep also work and muting when headphones are plugged in.
I can now confirm that compiling alsa drivers is not necessary on the Dell Latitude D630. Installing linux-backports -modules and adding "options snd-hda-intel model=dell-m42" in /etc/modprobe. d/alsa- base activates sound at a stable volume. Hibernate and sleep also work and muting when headphones are plugged in.