[SOLVED] No brightness control with Intel!

henriqueleng · 2014-02-18 19:49:19

Hi, i bought a new motherboard (Asus Z87-K) and a i7 4770k. In the processor box are witten that it have a Intel HD Graphics 4600 GPU.
I have never used a UEFI motherboard before and i passed all the day trying to configure the UEFI boot! ( im using gummiboot)

With the system instaled, i too installed the xf68 intel drivers. But i realized that that i cant control the brightness. So i tryed to do it mannualy editing the /sys/c ass/backlight/* archive. But in this folder don't have the intel folder, just an acpi_video0 folder, and when i edit it anything happen .

In my older notebook with a intel graphis, just edit the archive are the solution, but now it dont help.

I too tried xbacklight, and i receive the message.

 # xbacklight +20% 
 No outputs have backlight property

The strange thing is that my lscpi output show me this:

 $ lscpi | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller (rev 06)

I readed something about boot configuration, but im noot using GRUB, and they say to add some paramethers to boot script.
I'm using HDMI!
Right now, anything solved my problem.

Henrique Lengler

Last edited by henriqueleng (2014-02-19 00:11:50)

jasonwryan · 2014-02-18 20:15:20

The gummiboot documentation includes details on adding parameters to the kernel line...

henriqueleng · 2014-02-18 22:36:43

Another thing, in my bios i have two UEFI options to boot, UEFI os e Linux Boot, and both when boot, any boot screen like grub screen, appear, just directly load the system. It is normal?

jasonwryan · 2014-02-18 22:41:06

What do you expect? A splash screen? Or a pretty menu? You need to use syslinux or grub for that sort of functionality.

Not a Kernel issue, moving to NC...

henriqueleng · 2014-02-18 23:22:51

whaaat, my real question really are sbout hardware and kernel, why move it?

jrmrjnck · 2014-02-18 23:28:29

It sounds like you have a desktop connected to an external monitor through HDMI and you're trying to control the monitor's brightness through the kernel driver. That's not possible, so please clarify your question and what you are expecting to happen.

henriqueleng · 2014-02-18 23:41:01

Ok, in my old computer i changed the brightness editing de brightness file in /sys/clas/backlight/.... Now, the brightness file too boot in 100%, but when i change it, anything happen.

Decreasing brightness in my monitor does not down the brightness sufficiently how i see in other computers, it continue really bright, not so much, but rather.

jrmrjnck · 2014-02-19 00:03:07

Your old computer was a laptop with integrated display, and your new computer is a desktop with external monitor, right? As far as I know, you cannot control a monitor's backlight through a standard video interface. Laptops can use /sys/class/backlight because they have a direct connection to the backlight hardware. If the monitor's built in controls do not lower the brightness sufficiently, then there is not much else you can do. There may be software methods to lower the overall brightness (I know nvidia can do this), but that is not the same as lowering the backlight and may hurt the image quality.

henriqueleng · 2014-02-19 00:10:26

Oh thank you
Its because i'm not experient with desktops, i only have used linux in notebooks before!
So there is it, i will see if i can do something better with my monitor!
Sorry by the mistake!

[SOLVED]

Last edited by henriqueleng (2014-02-19 00:10:41)

Arch Linux

#1 2014-02-18 19:49:19

[SOLVED] No brightness control with Intel!

#2 2014-02-18 20:15:20

Re: [SOLVED] No brightness control with Intel!

#3 2014-02-18 22:36:43

Re: [SOLVED] No brightness control with Intel!

#4 2014-02-18 22:41:06

Re: [SOLVED] No brightness control with Intel!

#5 2014-02-18 23:22:51

Re: [SOLVED] No brightness control with Intel!

#6 2014-02-18 23:28:29

Re: [SOLVED] No brightness control with Intel!

#7 2014-02-18 23:41:01

Re: [SOLVED] No brightness control with Intel!

#8 2014-02-19 00:03:07

Re: [SOLVED] No brightness control with Intel!

#9 2014-02-19 00:10:26

Re: [SOLVED] No brightness control with Intel!

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