Definitely a laptop problem, hopefully not a hardware problem.
When I try to adjust my laptops screen brightness, it goes to some very low brightness and then the screen starts flickering (ie changing between different brightness levels). When my laptop boots, it's at full brightness, and when I adjust that, flickering starts. After that I cannot get it back to any non-very-low brightness.
I'm not sure if this is where i should put this but.
My brother got me ubuntu today since i've been having problem's with Windows.
I really like it, but I can't change the screen brightness?
I hate using my computer at night with the screen brightness up so much.
I'm using Ubuntu 12.04 with up to date packages running on a Dell Inspiron N4030 laptop with an ATI Radeon HD 5400 graphics card. I'm using the new Catalyst 12.6 graphics driver (this version already fixed various bug with linux kernel 3.0)
The Problem is when I reduce the brightness and then restart it.
I've got a laptop with the Intel GMA 4500 chipset, and my Ubuntu system is using the i915 driver.
I've gone through a few different versions of Ubuntu, and other linux distro's, each one unable to control the brightness. This is obviously eating up my battery life, since the screen is at a constant 100% brightness, when I usually use about 35% brightness.
When I use the brightness changing buttons Unity changes the brightness by two levels each time to create a nice effect. However, I only have about 10 different brightness settings and so this effect has caused a reduction in brightness settings to 5.
The brightness keys on my laptop are not recognized by Ubuntu, which is a common problem for a variety of laptops, is there a way to set an arbitrary key shortcut to change brightness in Ubuntu 12.04? I looked in the Keyboard settings app under the shortcut tab, and I couldn't find one.