8

brightness set to 100% following update

view full story
linux-howto

https://bbs.archlinux.org – I usually have laptop-mode tools configure my brightness. Essentially, it sets the brightness to 12 on AC and 7 on battery. This worked fine until a recent update. This coincided with the upgrade to the latest kernel in the stable repo but I'm not sure the kernel is responsible. Basically, when I boot, brightness is now at 100% (15). If I remove the AC, brightness is correctly set to 7. If I replace the AC, brightness is correctly set to 12. So this is hardly an insurmountable problem. However, it is annoying me that I can't figure out what is overriding my settings all of a sudden s (HowTos)

missing's picture
Submitted by missing on 01/27/2013 – Made popular on 01/27/2013

Stories similar to brightness set to 100% following update

Hardware: HP DVD6t, AMD Radeon 6700 OS: Natty 32-bit I have researched a lot on this and basically most of the solutions that are on the internet / stackexchange revolves around the brightness buttons not working.

If you are brightness buttons are not working then you can do a million things to get it work i) install applets ii) modify /etc/brightness file iii) write scripts to modify brightness

Brightness of my Laptop LCD 2 years 40 weeks ago

Hi everyone, when I start my computer it starts with max brightness, I don't like it. So in rc.local I put

Quote:

echo -n 25 >/proc/acpi/video/GFX0/LCDD/brightness

It work fine for run-level 3, but when I startx the brightness go to max again. Can I control/save brightness for X.

I use slackware64 13.1 with a Ati graphic card.

This is just an annoying little bug that I'm having.

Every time I reboot my system, brightness is restored to 100% and stays that way until I manually lower it down using my brightness keys.

100% brightness is blinding, and while it's not a major issue, it's still annoying to have to do this manually.

Laptop: Dell Studio 1555

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.

Hi

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.

I followed this tutorial to set the brightness indicator on Unity.

Is there a way to prohibit Powerdevil from messing with the screen brightness?

I already tried to disable the tick box "Let PowerDevil manage screen powersaving" but that does not fix it. It still controls brightness.

Hello,

I am installing a fresh copy of Fedora 18 on my laptop. HP Envy dv7. The brightness control works great on the Live CD and after installing. However, when I upgrade to the latest kernel/packages. The scale of the brightness control is off.

Previously I use the keyboard brightness control keys and I hit it 7 times to reach the maximum brightness.

I have a Samsung NF210 and while the Fn-Brightness keys are registering (that is the brightness pop-up with the amount of brightness bar is showing and changing) the actual brightness is not changing. Volume works fine.I have tried addingacpi_osi=linuxto grub as suggested by another post with a similar, but not exact, laptop.