Ask Your Question

How to get backlight working on e525?

asked 2011-11-14 12:54:22 +0000

Peter Scott gravatar image

updated 2013-06-04 02:52:42 +0000

Postscript: I did not realise it when I posted, but this problem is about the laptop's backlight being permanently off. The screen goes black while the kernel is loading and stays off preventing users seeing even the login screen. It started with Fedora 15 and has persisted. Installing in basic graphics mode was needed because the screen went black with full graphics.

Postscript2: kernel-3.8.6-203.fc18.x86_64 fixed this bug. Fedora works out of the box again, although the brightness controls still do not work.

Original question: I have an eMachines e525 laptop. F14 ran properly out of the box with the screen at 1366×768. With F16 I had to install in basic graphics mode and now the screen resolution is fixed at 1024x768, everything looks squat, and Gnome3 only runs in fallback mode.

The e525 has the Intel Mobile 4 Series Chipset Integrated Graphics Controller (GM45).

Has anyone solved this problem yet?

edit retag flag offensive close merge delete

3 answers

Sort by » oldest newest most voted

answered 2013-04-08 16:37:27 +0000

Peter Scott gravatar image

updated 2013-04-09 11:44:22 +0000

The squat appearance was caused by the vesa driver being used because I had to install in basic graphics mode. Removing the xorg.conf created by Anaconda caused the intel driver to be used but the screen went black during kernel loading and stayed black.

Adding i915.invert_brightness=1 to GRUB_CMDLINE_LINUX in /etc/default/grub eg:


and running:

grub2-mkconfig -o /boot/grub2/grub.cfg

Solved the problem.

BTW: During the lifetime of this problem Intel's Open Source Technology Centre made some drivers available. I installed them but they did not help and I removed them.

edit flag offensive delete link more

answered 2012-06-18 18:00:42 +0000

ejhuff gravatar image

Regarding response by hhlp:

$ yum info libtxc_dxtn
Available Packages
Name        : libtxc_dxtn
Arch        : i686
Epoch       : 1
Version     : 1.0.0
Release     : 1.fc15
Size        : 13 k
Repo        : rpmfusion-free
Summary     : Free implementation of the s3tc texture compression algorithm
URL         : http://cgit.freedesktop.org/~mareko/libtxc_dxtn/
License     : BSD
Description : Free implementation of the s3tc texture compression algorithm

$ yum info mesa-dri-drivers Loaded plugins: auto-update-debuginfo, refresh-packagekit Installed Packages Name : mesa-dri-drivers Arch : i686 Version : 7.11.2 Release : 3.fc16 Size : 34 M Repo : installed From repo : updates Summary : Mesa-based DRI drivers URL : http://www.mesa3d.org License : MIT Description : Mesa-based DRI drivers.

edit flag offensive delete link more

answered 2011-11-30 19:21:33 +0000

hhlp gravatar image

updated 2013-04-08 07:36:32 +0000

Bucic gravatar image

have you tried the latest Intel drivers from RPM Fusion?

1.- Activate RPMFusion:

su -c 'yum localinstall --nogpgcheck http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm'

2.- update :

sudo yum -y update

3.- Install...

sudo yum -y install mesa-dri-drivers
su -c 'yum install libtxc_dxtn --enablerepo=rpmfusion-free-updates-testing'

4.- Update again:

sudo yum -y update


edit flag offensive delete link more


@Peter Scott Good point. There is no "intel proprietary drivers". A bit of misunderstanding. I've edited the hhlp's post.

Bucic ( 2013-04-08 19:05:25 +0000 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

[hide preview]

Use your votes!

  • Use the 30 daily voting points that you get!
  • Up-vote well framed questions that provide enough information to enable people provide answers.
  • Thank your helpers by up-voting their comments and answers. If a question you asked has been answered, accept the best answer by clicking on the checkbox on the left side of the answer.
  • Down-voting might cost you karma, but you should consider doing so for incorrect or clearly detrimental questions and answers.

Question Tools



Asked: 2011-11-14 12:54:22 +0000

Seen: 4,710 times

Last updated: Jun 04 '13