.
My laptop is my main computing platform. I use almost none
of its portability features. It IS my desktop. It is always
plugged in and charging. As a computer, it is only turned on
for a few hours at a time, and not left booted up and on-line
unless it is being used. I don't use any standby or suspend
features. A default linux screen-saver pops up after ten minutes
of keyboard inactivity, but this triggers no ill after-effects.

Used in this way, I do not experience any 'backlight' problems
with Knoppix 6.4.4 using the 2.6.37 kernel with Intel i915
video. There is an understandable 'fixme' warning that occurs
during boot, but ONLY during boot. Triggering the backlight bug
requires some specific and otherwise irrelevant command-line
entries, or the actual standby/suspend video state changing
features I don't normally even think of using.

So, to make a long story shorter, for MY particular usage,
I am unaware of any practical negative consequence to be
expected due to the backlight imperfection in Knoppix 6.4.4
caused by an incompatibilty of the 2.6.37 linux kernel
and the current i915 Intel video driver.

For those laptop/Intel video users, who may be more concerned
than I on the laptop backlight problem, the kernel.org people
'are on it'. Their current heading on this effort is defined at

https://bugzilla.kernel.org/show_bug.cgi?id=22672

Please speak up if you think I'm too complacent on this.