X86Config: DisplaySize versus Commercial Data

[Jerome BENOIT <benoit@eie.gr>]

Hi All,

I try to configure a my new LCD screen:
the pixel are so tiny that I may try to play the `DisplaySize' option in 
`X86FConfig-4'.
`xdpyinfo' give for my main screen:
"dimensions: 1600x1200 pixels (542x406 millimeters)"
THe data in pixels are true,
but the data in millimeters are clearly unrealistic for a laptop screen.

I know from the booklet that ,y screen is a `15"' screen
(screen diagonal dimension: ~380 millimeters (?)):
can we compute from this value the effective height H and the effective 
length L of the screen ?
In particular, is the ratio L/H fixed ?
[for A0, A1, A2, ...  european paper sizes: L/H=sqrt(2)]

Thanks in advance,
Jerome