Power Management no longer allowing me to change display brightnes

[Shiroinohi]

I'm on a Toshiba Satellite that's worked fairly well except for a few
self-repaired hiccups. However, about a week ago my power management plans
suddenly stopped working. I can switch from different plans that change how
quickly my display turns off, but my screen has been stuck at the lowest
brightness possible for a while now. It has nothing to do with the plans
themselves, I've restored all to their default settings and still no change
in brightness when I switch between all of them. The little slider to adjust
brightness simply does not appear anymore. I can't find what exactly it is
that's malfunctioning to reinstall, as no power management driver appeared on
my disk from Toshiba. Can anyone provide an explanation or perhaps a link to
repair this?

 

[Shiroinohi]

No, unfortunately by the time I realized that a simple shut down and restart
wouldn't solve the problem, my computer had overwritten the restore points
before the problem happened.

 

[Shiroinohi]

Adjust Display Brightness no longer appears on the left hand menu. Before it
did, but now I have no way of adjusting the brightness.

 

[Shiroinohi]

It might have been SP1, though I don't really remember when I installed it.
How would I go about uninstalling in order to check?

 

[moondawg]

Have you tried to go to
http://www.csd.toshiba.com/cgi-bin/tais/su/su_sc_home.jsp , select your model
and download the "Toshiba Value Added Package" and (re) install it? It has
the power management features. This might help, hopefully

 

[Shiroinohi]

Just uninstalled and reinstalled the package, and still no change, thanks
though.

 

[RalfG]

It should be but that's not necessarily true. For whatever reason at some
point in time my system stopped keeping restore points older than 3-5 days.
Each time it creates a new automatic restore point it drops the oldest
point, even if there are only 4 restore points saved on the computer.

 

[Shiroinohi]

Adjusting brightness option does not appear.

Hello Shiroinohi,
This is my lasr trump card. Control Panel >Classic View > Windows
Mobility Centre >change you brightness there. If that does not work, I'm
cooked!

 

[RalfG]

Hello Ralfg,
You might want to take a look at your OS C drive. Is it badly running
out of space ?

No, there was lots of free space, around 20GB. I did try something today --
removed several DVD images being stored on that drive. That freed up another
12GB.

 

[Bigboy]

I have exactly the same probelm on my Toshiba Satellite - ever since I
installed Vista, before SP1 in fact. There is no option 'Adjust Display
Brightness' in Power Management not a tile to do so in Mobility Center. I
have not found a fix for it but have found that when you do a Restart the
system starts with full brightness. Keep the mains cable connected and full
brightness is maintained when you next shut down and switch on again.
Mystifying.....