DLC wrote:
Greetings all,
I have a very nice iBook G3 (dual USB, rev. 2) running OS 10.4.11.
Just noticed something odd:
1) the keys that control the brightness don't do so, though they do
engage/function if I re-assign them through short cuts (to do
something else).
2) linked or not (I think it might be), the Displays preferences pane
is supposed to have a slider to give you virtual control of
brightness, yes (the "Help"utility says so)? Mine does not.
Any reason why this anomaly in the unit's OS? Does the iBook normally
have this addition in the Displays preference?
For the record, the display does respond to brightness adjustment when
one engages color profile calibration.
In the Keyboard Preferences, Keyboard Shortcuts section under the
Display section (it should be near or at the end) check that "Decrease
display brightness" and "Increase display brightness" are check and have
the correct key shortcuts assigned.
As a rule any Mac whose display is software controlled should have the
Brightness slider in Display Prefs.
The fact that both these features are not working implies something else
is not right, something in the guts of the OS that makes the OS not know
that you can control the screen brightness.
Step one, restart the computer.
You could try poking around in System Profiler to see if anything there
is amiss. Look under Graphics/Displays and see what it says for
"Displays:", specifically the name of the display.
I suppose you could try resetting NVRAM.
--
Clark Martin
Redwood City, CA, USA
Macintosh / Internet Consulting
"I'm a designated driver on the Information Super Highway"
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