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Old 05-19-2008, 01:38 AM   #1
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Xorg default refresh rate for different resolutions


At one point Xorg changed behavior of modelines, I think it was Xorg 7.3. I want to set 60hz as the default for various lower resolutions like 640x480 800x600 and 1024x768. By default, I mean what it changes to when you simply run xrandr -s XxY without -r, they are also the first on the list when simply running xrandr. Before, I could do this by setting modelines for each resolution and specifying only those modes in the Screen section. Now it doesn't work. The modes show up, but the highest possible refresh rate is now always the default for each resolution. How could I do what I seek with this newer Xorg?
 
Old 05-21-2008, 08:22 AM   #2
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could you post the sections for your Monitor and screen so we can see what you have pls?

also what distro are you on and do you use KDE gnome or what window manager pls?
 
Old 05-22-2008, 01:02 AM   #3
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Distro is Fedora 8, using Gnome or Xfce, but honestly I don't think that matters.

The xorg sections are:

Code:
Section "Monitor"

	Option	    "RandRRotation" "on"
	Option		"RandRReflection" "on"
	HorizSync	30-82
	VertRefresh	56-76
	Modeline "800x600"  38.22  800 832 912 1024  600 601 604 622  -HSync +Vsync
	Modeline "640x480"  23.86  640 656 720 800  480 481 484 497  -HSync +Vsync
	Identifier   "Monitor0"
EndSection

Section "Screen"
	Identifier "Screen0"
	Device     "Videocard0"
	Monitor    "Monitor0"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     24
	        Modes "1280x1024" "800x600" "640x480"
	EndSubSection
EndSection
 
Old 05-22-2008, 04:00 AM   #4
aus9
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honestly if you used kde you could use kde control center that can have its values for screen refresh rates written to xorg.

2) you might try this force
http://www.linuxquestions.org/questi...91#post2365191

ignore the values altho they mention one way of generating modelines xvidtune is another way.
 
Old 05-23-2008, 01:21 AM   #5
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I have tried all this already. The modes don't get rejected, they just don't get put at the front. Maybe new Xorg is hard coded this way. Also, manually changing rates is not going to work for my intended purpose because the targets run fullscreen. Switch out of full to change, switch back, they go back to the first refresh rate. They must be the default for a res in xorg. Thanks though.
 
Old 05-23-2008, 04:30 AM   #6
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If I set my Modes like this:
Code:
Modes          "1024x768_85"
I have X running 1024x768 at 85Hz refresh rate. This may be specific to the nvidia driver so YMMV if you're using another driver.
 
Old 05-24-2008, 06:20 AM   #7
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Oh yes, it's very likely driver related. I'm running the regular "radeon" driver, which apparently sucks just like ati as a whole.
 
  


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