should suspend turn off backlight ?

[Mikus Grinbergs]

G1G1.  AC is plugged in.  Q2D11.  Recently, 1628.

I normally run with 'suspend' inhibited -- to preserve my wired 
connection.  [Am using an USB-ethernet adapter.  'Suspend' drops 
power on the USB, and loses the local_LAN IP address.  'Resume' does 
NOT re-establish this (wired) local LAN connection.]  With 'suspend' 
inhibited, the display "blinks" periodically -- the backlight dims, 
then after a bit brightens again.  If I go away for a long time, the 
display is dark when I come back to it.

Tried running with 'suspend' permitted.  The backlight dimmed, USB 
power was lost, and the "power" light started blinking.  Came back 
hours later, and the backlight was still "dim".  If power is to be 
saved by turning off the CPU, oughtn't power *also* be saved by 
turning off the backlight ?

mikus