Adjusting Screen Brightness

**FlyingJester** · 02-19-2011

After installing Fedora 14, I can't seem to make my screen brightness go above the absolute minimum. I've tried editing /proc/acpi/video/VGA/LCD/brightness to change the current setting from 20 to 100, but I can't save it, even when logged in as su, it returns "Invalid Argument" when I try to enter the filename of where to save. What do I do?

**Lazydog** · 02-20-2011

How are you editing this file? Have you tried the following:

Code:

echo -n 100 > /proc/acpi/video/VGA/LCD/brightness

**FlyingJester** · 02-20-2011

I have tried that. It returns:

-bash: echo: write error: Invalid argument

I have been using nano to edit the file through the terminal, which seems to work well except for the saving. I was under the impression that a normal text editor could not open this file correctly.

**Lazydog** · 02-21-2011

OK, if you are using X did you go into your Control Center for the Display and check what the Monitor Gamma is set to and play with that?

**FlyingJester** · 02-21-2011

I'm using LXDE. The only thing monitor settings can control is resolution and refresh rate.

**FlyingJester** · 02-22-2011

........Help?

**Lazydog** · 02-22-2011

I don't know LXDE, sorry. You are going to have to google this one.

**FlyingJester** · 02-23-2011

Google results almost always say to use echo, but for some reason my echo won't take the >, and if I remove it it just echoes on the console...

**FlyingJester** · 02-28-2011

No really, can anyone help? any other ways to write to a file besides nano or echo? Or any reasons echo won't take the > command?

**FlyingJester** · 02-28-2011

Alright, how about this: is there any way to edit that file as root using a normal text editor?

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