Power Management no longer allowing me to change display brightnes

  • Thread starter Thread starter Shiroinohi
  • Start date Start date
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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?
 
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.
 
Adjust Display Brightness no longer appears on the left hand menu. Before it
did, but now I have no way of adjusting the brightness.
 
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?
 
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.
 
Adjusting brightness option does not appear.

t-4-2 said:
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!
Click to expand...
 
t-4-2 said:
Hello Ralfg,
You might want to take a look at your OS C drive. Is it badly running
out of space ?
Click to expand...

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.
 
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.....
 
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