SOLVED: No sound after login on Ubuntu Eee PC / Ubuntu Linux

I’ve posted twice recently about my problems following an upgrade of Ubuntu Netbook Remix to Lucid Lynx (10.04).  In short, I upgraded both the BIOS of the netbook (an Asus Eee PC 1008HA) and upgraded Ubuntu from 9.10 (Karmic Koala) to 10.04 (Lucid Lynx).  Once I did this the sound would disappear after the first time I logged in following each boot, and only work properly if I logged out and in again.

One kind commenter (thank you “ThrasherC”) suggested