Comment 20 for bug 94373

I also experienced this with my Toshiba A100-TA7 with Ubuntu 7.04 (final release)

With Edgy, I never experienced any problems with sound. Whether I rebooted/suspended or not, it always worked.

echo "options snd-hda-intel model=3stack" >> /etc/modprobe.d/alsa-base
and a reboot fixed the problem for me.

Some hardware info:
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02)
        Subsystem: Toshiba America Info Systems Unknown device ff10
        Flags: bus master, fast devsel, latency 0, IRQ 22
        Memory at dc240000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: [50] Power Management version 2
        Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
        Capabilities: [70] Express Unknown type IRQ 0