Brightness Applet not found

Support for the other architectures (X86_64, IA-64, and PowerPC)
KREATOR
Posts: 6
Joined: 2010/03/05 08:21:41

Brightness Applet not found

Post by KREATOR » 2010/03/06 21:48:04

Hello, I have installed CentOS 5.4 on a Macbook Pro unibody (late 2009). I have managed to get everything working so far. There is just one thing I really need to get the battery to last longer. I want to reduce screen brightness when the laptop is running on battery.

I read about the brightness applet but I have not found it.

What can I do ?

User avatar
AlanBartlett
Forum Moderator
Posts: 9323
Joined: 2007/10/22 11:30:09
Location: ~/Earth/UK/England/Suffolk
Contact:

Re: Brightness Applet not found

Post by AlanBartlett » 2010/03/07 13:59:23

Welcome to the [i]CentOS[/i] fora.

[quote]
I read about the brightness applet but I have not found it.
[/quote]
That is something new to me . . . by writing that, I am not suggesting it doesn't exist. However, please post the URL to the location from where you have read about it. :-)

KREATOR
Posts: 6
Joined: 2010/03/05 08:21:41

Re: Brightness Applet not found

Post by KREATOR » 2010/03/07 21:00:17

http://library.gnome.org/users/gnome-power-manager/stable/applets-general.html.en#applets-brightness

I don't really know if my hardware (Macbook Pro Unibody) is supported for the brightness applet. I tried adding it by right clicking on a panel>add to panel>brightness applet but there was no brightness applet. IFF my hardware is not supported, is there any other option?

User avatar
AlanBartlett
Forum Moderator
Posts: 9323
Joined: 2007/10/22 11:30:09
Location: ~/Earth/UK/England/Suffolk
Contact:

Re: Brightness Applet not found

Post by AlanBartlett » 2010/03/08 14:12:09

Thanks for posting that link. (A quick and easy read.)

I think this issue could be twofold:

The first is that as [i]CentOS[/i] is built from the sources of [url=http://wiki.centos.org/FAQ/General?highlight=(TUV)#head-d29a2b7e61ffc544973098f9dd49fe4663efba50]TUV's[/url] product, [i]RHEL[/i], by virtue of the existence of the word [i]Enterprise[/i], we know that the "[i]latest and greatest[/i]" version of any package is not used in the OS distribution. Hence the distributed version of [i]Gnome[/i] (for [i]RHEL[/i] & [i]CentOS[/i]) may not contain the required function.

The second is as you speculate -- that your hardware may not be supported.

Perhaps other laptop users of [i]CentOS[/i] may be able to comment?

KREATOR
Posts: 6
Joined: 2010/03/05 08:21:41

Re: Brightness Applet not found

Post by KREATOR » 2010/03/08 21:23:00

Thank you for replying..
Does the graphics card has to do anything with the brightness applet? (I have not installed the nvidia 9400M driver yet)

IFF there is no way to get the brightness applet on my MBP unibody (CentOS 5.4), is there another way to reduce the screen brightness? (or to get the laptop brightness buttons to work?) Because I want to get the battery to last longer...

User avatar
AlanBartlett
Forum Moderator
Posts: 9323
Joined: 2007/10/22 11:30:09
Location: ~/Earth/UK/England/Suffolk
Contact:

Re: Brightness Applet not found

Post by AlanBartlett » 2010/03/09 16:46:23

[quote]
Does the graphics card has to do anything with the brightness applet? (I have not installed the nvidia 9400M driver yet)
[/quote]
Not having a laptop system, with which to experiment, I am actually speculating here . . . possibly yes.

However, I suspect this issue is connected with the first of my two previous comments.

Regarding the installation of the [i]nVidia[/i] graphics drivers, please take a look at what is available from the [url=//elrepo.org]ELRepo project[/url]. A kernel independent, kABI tracking [url=http://elrepo.org/tiki/Packages]kmod package[/url] will make your life considerably easier at the next kernel update . . . you will not need to take any action with regards to the graphics. :-)

[Agreed, by looking at my signature block, one may deduce some bias on my part. However there [i]is[/i] a significant installed user-base.]

KREATOR
Posts: 6
Joined: 2010/03/05 08:21:41

Re: Brightness Applet not found

Post by KREATOR » 2010/03/10 00:00:43

so should I just install the kmod-nvidia repo for the nVidia 9400M?

NedSlider
Forum Moderator
Posts: 2890
Joined: 2005/10/28 13:11:50
Location: UK

Brightness Applet not found

Post by NedSlider » 2010/03/10 13:15:46

Alan asked me to look in on this, but I don't know how much help I can be.

My laptop automatically reduces screen brightness when switching to battery. I use KDE and I have onboard Intel graphics, although I suspect it also works for gnome too. I didn't have to do anything to enable this feature - it pretty much just works although I've no real idea how.

When I next boot it up, I'll have a look around and see if I can see anything, and also try it with gnome too for you.

Sorry I can't be more help.

NedSlider
Forum Moderator
Posts: 2890
Joined: 2005/10/28 13:11:50
Location: UK

Re: Brightness Applet not found

Post by NedSlider » 2010/03/10 13:18:30

If you want to try the elrepo nvidia driver, then yes, do a 'yum install kmod-nvidia'.

It will also install nvidia-x11-drv as a dependency.

The -173xx and -96xx series drivers are older legacy drivers to support older hardware. Your 9400M card will be supported by the current/latest driver.

Hope that helps.

KREATOR
Posts: 6
Joined: 2010/03/05 08:21:41

Re: Brightness Applet not found

Post by KREATOR » 2010/03/10 21:35:10

Thank you for taking the time to help me.. I really appreciate it.

I guess the GPU has nothing to do with the screen brightness since I installed the kmod-nvidia repo, restarted, and nothing. (unless I had to do something else after installing the repo)

I really need to reduce the brightness when running on battery, it just comsumes the battery quickly without reducing the screen brightness.

I saw this on GNOME Power Management Manual

"Some sliders or option boxes may be disabled if the gconf policy keys are
not writable.
This allows administrators to lock-down the actions that a user can select."

How do I make the gconf policy keys writable?

Thank you again..

Post Reply

Return to “CentOS 5 - X86_64,s390(x) and PowerPC Support”