Comment 160 for bug 318942

@Thomas:
I couldn't find any suggestions about sound in jaunty for your specific netbook (HP110). Also, I'm not sure if there are hardware differences regarding sound card.

aplay -l gives me:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

I'm running 2.6.28-14-generic, but also worked for 2.6.28-13-generic before.

I'm using solution posted before (comment #63) since I've installed Jaunty, and always did the trick for me. Between kernel upgrades I have have to do the compilation process again... just run the script. Verify that you have mentioned packages installed before compilation process.
UPDATE: you could try using latest alsa version. In comment 63: where it says 1.0.19, change it to 1.0.20... I've using that version without problems so far.

Also, you could try this in your alsa-base.conf file:
options snd-hda-intel model=dell-m4-1
or
options snd-hda-intel model=ref-no-jd

(just make sure to reboot after changes)

Good luck!