Comment 6 for bug 93859

Solved(?) this problem on another Toshiba Staellite A100-SK4 (PSAA8C-SK400E)
by following most of the directions here:

https://help.ubuntu.com/community/HdaIntelSoundHowto

However, contrary to that document, this is the entry that I appended to
/etc/modprobe.d/alsa-base to get the sound to work properly:

options snd-hda-intel model=auto

The sound now seems to be working. At least it has over the past
two reboots.