laptop Digest, Vol 55, Issue 10: brightness problems in FC14 on Lenovo T510

[Eran Arad]

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 at lists.fedoraproject.org>wrote:

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>   1. Problem with Fedora 14 on a Laptop (Eran Arad)
>   2. Re: Problem with Fedora 14 on a Laptop (Harlequin)
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Sun, 28 Nov 2010 20:44:39 +0200
> From: Eran Arad <eran.arad at gmail.com>
> Subject: Problem with Fedora 14 on a Laptop
> To: laptop at lists.fedoraproject.org
> Message-ID:
>        <AANLkTi=AkQGO46km9D4PzY4g7UyW+h5vpsitgk7exyAm at mail.gmail.com<AkQGO46km9D4PzY4g7UyW%2Bh5vpsitgk7exyAm at mail.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 at googlemail.com>
> Subject: Re: Problem with Fedora 14 on a Laptop
> To: laptop at lists.fedoraproject.org
> Message-ID: <6bb59c6e-0455-4afe-8709-f34011514b5e at 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 at 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 at lists.fedoraproject.org
> >https://admin.fedoraproject.org/mailman/listinfo/laptop
>
> --
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> End of laptop Digest, Vol 55, Issue 10
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