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-   -   laptop Digest, Vol 55, Issue 10: brightness problems in FC14 on Lenovo T510 (http://www.linux-archive.org/fedora-laptop/458967-laptop-digest-vol-55-issue-10-brightness-problems-fc14-lenovo-t510.html)

Eran Arad 11-29-2010 02:54 PM

laptop Digest, Vol 55, Issue 10: brightness problems in FC14 on Lenovo T510
 
Hi
*
The brightness button are working properly in Windows 7.
The problem arises while using under FC14. Indeed it appears that the brightness
buttons are not scaled correctly. I tried to set the power management so that there won't
be lower brightness when working on battery but it had no effect.
Following this a message* I received a suggestion from Vinzenz Vietzke to add
a line
Option "RegistryDwords" "EnableBrightnessControl=1"
to file /etc/X11/xorg.conf.
However, while there is such a file in RedHat Enterprise distribution,
the FC distribution does not have such a file. None in FC12
in FC14 there is a /etc/X11/xorg.conf.d directory where the keybord conf file
resides.
*
So, the problem still exists
*
Thanks for your support,
Eran

On Mon, Nov 29, 2010 at 2:00 PM, <laptop-request@lists.fedoraproject.org> wrote:

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Today's Topics:

* 1. Problem with Fedora 14 on a Laptop (Eran Arad)
* 2. Re: Problem with Fedora 14 on a Laptop (Harlequin)



----------------------------------------------------------------------

Message: 1
Date: Sun, 28 Nov 2010 20:44:39 +0200
From: Eran Arad <eran.arad@gmail.com>

Subject: Problem with Fedora 14 on a Laptop
To: laptop@lists.fedoraproject.org
Message-ID:
* * * *<AANLkTi=AkQGO46km9D4PzY4g7UyW+h5vpsitgk7exyAm@ma il.gmail.com>

Content-Type: text/plain; charset="iso-8859-1"

Hello

I wonder if someone encountered this problem:
I have just received a brand new Lenovo T510 Laptop. I have installed,
successfully, a Fedora 14 system. This is a dual-system machine, with Window

7 Professional also installed.

The problem: Staring the machine in Fedora, unplugged to electricity, the
screens dims down to hardly readable level. Trying to increase brightness,
using the function+brightness button has no effect. Plugging to electricity

restores proper brightness.
Another show up of the same problem: started plugged in with proper
brightness, than any touch of function+brightness key brings the screen to
unreadable, and unchangeable brightness. Seem to me that the eFedora 14

scales the potentiometer of screen luminosity incorrectly.

Some information: Working in Windows 7, on the same machine: this does not
happen
* * * * * * * * * * * * * On previous Lenovo, T60p, with Fedora 12, this

did not happen either.

Has anybody encountered this problem ? any clue how to resolve,

Thanks,
Eran
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------------------------------

Message: 2
Date: Sun, 28 Nov 2010 20:23:29 +0100
From: Harlequin <harlequix@googlemail.com>
Subject: Re: Problem with Fedora 14 on a Laptop

To: laptop@lists.fedoraproject.org
Message-ID: <6bb59c6e-0455-4afe-8709-f34011514b5e@email.android.com>

Content-Type: text/plain; charset=utf-8

It seemd hat your brightness buttons are not working. Could you please try to change brightness via the power manager. And which de are you using?



"Eran Arad" <eran.arad@gmail.com> schrieb:


>Hello
>
>I wonder if someone encountered this problem:
>I have just received a brand new Lenovo T510 Laptop. I have installed,
>successfully, a Fedora 14 system. This is a dual-system machine, with

>Window
>7 Professional also installed.
>
>The problem: Staring the machine in Fedora, unplugged to electricity,
>the
>screens dims down to hardly readable level. Trying to increase
>brightness,

>using the function+brightness button has no effect. Plugging to
>electricity
>restores proper brightness.
>Another show up of the same problem: started plugged in with proper
>brightness, than any touch of function+brightness key brings the screen

>to
>unreadable, and unchangeable brightness. Seem to me that the eFedora 14
>scales the potentiometer of screen luminosity incorrectly.
>
>Some information: Working in Windows 7, on the same machine: this does

>not
>happen
> * * * * * * * * * * * * On previous Lenovo, T60p, with Fedora 12, this
>did not happen either.
>
>Has anybody encountered this problem ? any clue how to resolve,
>

>Thanks,
>Eran
>_______________________________________________
>laptop mailing list
>laptop@lists.fedoraproject.org
>https://admin.fedoraproject.org/mailman/listinfo/laptop


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