Screen Brightness Stuck on high on an HP dv7t laptop

Posted by theJollySin on Ask Ubuntu See other posts from Ask Ubuntu or by theJollySin
Published on 2012-06-21T04:01:42Z Indexed on 2012/10/08 15:52 UTC
Read the original article Hit count: 180

Filed under:

12.04

|

laptop

|

screen

|

brightness

I have an otherwise fully-functioning install of Ubuntu 12.04 on my HPdv7t laptop.

When I press the 'brightness buttons' on the keyboard the associated images appear on my screen to say I am increasing/decreasing the screen brightness. When I go into "System Settings" I can move the 'brightness slider bar' up and down.

But none of that changes the fact that my screen is stuck on the highest brightness setting.

ANY clues on how to fix this would be greatly appreciated. This giant 17-inch monitor is blinding, and this is making it hard to code for any length of time.

© Ask Ubuntu or respective owner

Related posts about 12.04

Wipe 12.04/Windows 7 dual boot setup and start fresh new 12.04

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have an Asus u56e laptop running dual boot setup, Windows 7 and 12.04. I had Windows 7 first. I was wondering what's the easiest way possible to erase/format my drive (500GB) so that it deletes Ubuntu and Windows 7 so I can reinstall 12.04 onto my whole drive? Does the Ubuntu Live CD help make this… >>> More
In 12.04: Failed to load session 'ubuntu' [closed]

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
Possible Duplicate: There's an issue with an Alpha/Beta Release of Ubuntu, what should I do? I'm using 12.04 beta. Today I was prompted to install some updates, which I did, followed by a reboot. On reboot, X starts, but all I see is a single dialog window in the middle of the screen… >>> More
Will final version of 12.04 use the power management changes found in kernel 3.3

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have seen in some version of Ubuntu that instead of making a huge change to update to the latest kernel, they take some of the good stuff out of it, for the sake of stability and put it on a previous version. In this case, kernel 3.3 has seen some very good power management enhancements that are… >>> More
Wired PS/2 Keyboard and Mouse do not work in 12.04 Live CD or after fresh 12.04 install - Foxconn D270S Atom Motherboard

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
My Wired PS/2 keyboard and mouse do not work in 12.04, either in a fresh install or from the Live CD. A USB keyboard and mouse will work. The PS/2 keyboard and mouse will work using the same hardware and a fresh 10.04 Ubuntu install or a fresh Windows 7 install. The motherboard is a Foxconn D270S… >>> More
Difference between 12.04 and 12.04.1

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I recently did a fresh install of Ubuntu 12.04 two days ago. Or at least I thought it was 12.04, but actually 12.04.1. Now I'm having errors popping up from the grub loader. Error: no video mode activated which was apparently resolved in this bug# 699802. However these workarounds are for 11.xx… >>> More

Related posts about laptop

Why does my laptop resume immediately after suspend?

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I seem to be having some problem with suspend mode. Every time I try to suspend my laptop, it just locks the screen. Or maybe it successfully suspends just to resume only an instant after. What could cause such a behaviour? I'm running 32-bit Ubuntu 12.04 with the 3.2.0-25 kernel on a HP dv5-1178er… >>> More
Use laptop A's LCD as secondary monitor for laptop B

as seen on Super User - Search for 'Super User'
I have a working laptop (laptop A), but am interested in using the laptop's LCD as a secondary monitor for my main laptop (laptop B)...is there a way to do this via software or cabling without modifying laptop A? OS's are Windows XP SP3 and Windows 7. >>> More
Charging a laptop battery, without a laptop.

as seen on Super User - Search for 'Super User'
I have an old-ish laptop that only works on AC power because the battery is old and no longer holds a charge. I live in Christchurch New Zealand where there has recently been a number of very large earthquakes. During one of these earthquakes my laptop was thrown from my desk to the floor and now… >>> More
Aluminum Laptop Cases vs Leather Laptop Cases

as seen on Article City - Search for 'Article City'
Both aluminum and leather have been known for their excellent qualities in the world of business, travel and even fashion; but when it comes to choosing one, there are certain qualities that put alum... [Author: Shannon Hilson - Computers and Internet - March 23, 2010] >>> More
How to compare old laptop to new laptop?

as seen on Super User - Search for 'Super User'
I hope this question doesn't get closed at once :) I have an old laptop, a Compaq NC4200, which is going its final laps around the track these days. Battery is dead, and everything kinda runs slow. It also has only 1GB of memory, and even though I don't know if it can take more, I probably wouldn't… >>> More