That works fine when the computer has gone into suspend mode after no
activity. But if I manually place the computer into suspend mode, it
insists on a password when I power it on again. A bit inconsistent in
that I log in automatically without a password when I do a cold boot.
Does anyone know of a way of making that automatic too?

(This on 10.04. In 08.04, which I ran previously, the suspend was a
bit temperamental and I never used it. So I am very fond of 10.04 from
this point of view. I have not turned off my computer for more than a
week now).