[Intel-gfx] PCI configuration space of the VGA controller and laptop LCD picture quality.

[SD]

--- On Thu, 1/13/11, Felix Miata <mrmazda at earthlink.net> wrote:

> From: Felix Miata <mrmazda at earthlink.net>
> Subject: Re: [Intel-gfx] PCI configuration space of the VGA controller and laptop LCD picture quality.
> To: intel-gfx at lists.freedesktop.org
> Date: Thursday, January 13, 2011, 11:29 PM
> On 2011/01/13 11:58 (GMT-0800) SD
> composed:
> 
> > I still can't figure out why Fedora (13,14,15) shows
> LCD picture much
> > worse then opensuse 11.1.
> 
> What does "worse" mean? Most people who see "worse" are
> actually complaining
> about fonts, and in most cases even then they don't define
> what is "worse"
> about the fonts. Can you upload screenshots of both so
> people can see what
> "worse" means?
> 
> That said, Fedora sets some system wide variables that
> affect X
> quality/behavior in /etc/X11/Xresources:
> 
> Xft.dpi
> Xft.hintstyle
> Xft.hinting
> 
> openSUSE doesn't do that. If you comment those away in
> Fedora, or match the
> Xft.dpi number to your LCD's actual DPI, you may find the
> difference is
> reduced or disappears, particularly if actual DPI varies
> more than nominally
> from the Xft.dpi setting. OTOH, they may produce little or
> no improvement if
> you've set your DTE to force DPI or tweaked its font
> smoothing settings.
> 
> If you need to comment further, also specify which DTE you
> use, as that can
> matter as well in future responses.
> 
> > As long as I still want to use Fedora on my laptop I
> would like to ask -
> > can picture quality be spoiled by different PCI
> configuration?
> 
> I highly doubt it, other than if it's wrong there's no
> picture to assess the
> quality of.
> -- "How much better to get wisdom than gold, to choose
> understanding rather than silver." Proverbs 16:16 NKJV
> 
>  Team OS/2 ** Reg. Linux User #211409
> 
> Felix Miata  ***  http://fm.no-ip.com/
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> 

Thanks for the answer and questions.

Picture quality I meant is what I think after some bad experience with Fedora 13, 14 and now rawhide 15 it is backlight, it is not solid or smooth like on opensuse 11.1. On all fedora it looks like backlight flickers, and it doesn't make picture solid (smooth).

I check everything and compare everything I can. It is not font, or DPI because both OS on the same laptop and I made exactly the same settings.
But after less then an hour on Fedora my eyes start aching. I start to suspect backlight frequency or something else, because first that one can notice is higher screen brightness and therefor colors are brighter also. I did the same xgamma settings, backlight level is also the same.
 
Only thing is different, which I can see myself (and find myself) is PCI configuration.
Latter I will send here picture of screen with different colors from opensuse and fedora, also video PCI memory dump