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

2011-01-13 Thread SD
Dear All.

I still can't figure out why Fedora (13,14,15) shows LCD picture much worse 
then opensuse 11.1.

So my next question - can it be because of different PCI configuration space of 
my
00:02.0 VGA compatible controller: Intel Corporation Mobile 915GM/GMS/910GML 
Express Graphics Controller (rev 04).

lspci - gives me different outputs on fedora and opensuse although both 
of them are installed on the same laptop, on the same HD and use the same 
hardware.

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?

Thanks in advance.


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

2011-01-13 Thread Felix Miata

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

2011-01-13 Thread SD


--- On Thu, 1/13/11, Felix Miata mrma...@earthlink.net wrote:

 From: Felix Miata mrma...@earthlink.net
 Subject: Re: [Intel-gfx] PCI configuration space of the VGA controller and 
 laptop LCD picture quality.
 To: intel-gfx@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


  
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