Fedora 12 on Sony PCG-R505GL, display issue, intel 82830 graphics chipset..

[fujidust]

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[BugRocks1]

http://www.x.org/wiki/FAQVideoModes

Disable EDID frequencies in xorg.conf and your monitor should be recognized.

If that fails you can force horizontal and vertical frequencies on xorg.conf.

If that fails you can create a modeline and put that on xorg.conf

That last one have some risks if you put frequencies higher then your monitor can support, looking at the specs in the manual of your monitor will tell you which frequencies it does support.

https://wiki.ubuntu.com/X/Troubleshooting/Resolution
https://wiki.ubuntu.com/X/Config/Resolution
http://en.tldp.org/HOWTO/XFree86-Vid...WTO/fixes.html

16.1. The image is displaced to the left or right

To fix this, move the horizontal sync pulse. That is, increment or decrement (by a multiple of 8) the middle two numbers of the horizontal timing section that define the leading and trailing edge of the horizontal sync pulse.

If the image is shifted left (right border too large, you want to move the image to the right) decrement the numbers. If the image is shifted right (left border too large, you want it to move left) increment the sync pulse

[fujidust]

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[BugRocks1]

EDID is the information that your monitor sends the OS to configure it, the X Server have to decode that and interpret it but it is not doing a great job lately, this it is a bug and one should report if you have the time.

How do I know it is the EDID? Simple any screen misalignements are caused because of wrong values in the modeline that have the values for vertical and horizontal frequencies of your monitor.

If you use the nvidia drivers from rpmfusion(Leigh's Guide) it is easy to disable that issuing the following command:

su -
nvidia-xconfig --no-use-edid-freqs

Those links from the Ubuntu tutorials show in detail how to disable EDID and do other things, the links from the freedestop.org shows you how to edidt the modelines to adjust your monitor. There is a program that do that easily and it is called xvidtune but it is not in the Fedora repositories I would put a world to ask for that one on the repos managment if I knew how to do that.