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Old 05-26-2012, 09:46 PM   #1
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Question Need help with manual config of Display settings via config file

Ok, I am using a TV as a monitor connected via S-Video cable. The only Display options are 800x600 60MHz

I need to be able to change 800x600 > 1024x768 at least but not sure where to manually configure it.

If I had a VGA or DVI monitor I could just use that but my VGA monitor died on me.

I have an ATI Raideon 9200 series PCI Graphics card that is no longer maintained and has been moved as shown

The Distro that I am using is "Linux Mint 12" possibly looking moving up to "Linux Mint 13 MATE release"

Any help would be greatly appreciated and Thank you in advance.

Edit: I'm using the opensource driver as the ATI driver is no longer supported with older cards.

Last edited by dwmolyneux; 05-26-2012 at 10:09 PM.
Old 05-27-2012, 05:56 AM   #2
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Looks like you might need an /etc/X11/xorg.conf file (or the appropriate pieces in /etc/X11/xorg.conf.d/). As root, running Xorg :1 -configure from a terminal window will generate the file I'm thinking the pieces you'll want are a "Monitor" section with the appropriate modeline, and a "Screen section to invoke that mode. To get the appropriate modeline, use gtf as in the example below (which generates the modeline for 1024x768 60Hz):
gtf 1024 768 60
. Here are the appropriate sections of my xorg.conf file as an example:
Section "Monitor"

	#UseModes     "Modes0" #monitor0usemodes
	Identifier   "Monitor0"
	VendorName   "Monitor Vendor"
	ModelName    "Monitor Model"
	DisplaySize  432	270
	HorizSync    30.0 - 86.0
	VertRefresh  56.0 - 76.0
	ModeLine     "1440x900" 106.5 1440 1520 1672 1904 900 901 904 932 -hsync +vsync
	ModeLine     "1680x1050" 147.1 1680 1784 1968 2256 1050 1051 1054 1087 -hsync +vsync
	Modeline     "1920x1080"  172.80  1920 2040 2248 2576  1080 1081 1084 1118  -HSync +Vsync
	Option	    "PreferredMode" "1680x1050"

Section "Screen"
	Identifier "Screen0"
	Device     "Card0"
	Monitor    "Monitor0"
	SubSection "Display"
		Viewport   0 0
		Depth     24
        Option "IgnoreEDID" "TRUE"
		Modes    "1920x1080" "1680x1050" "1440x900" "1280x1024"
		#Modes    "1680x1050" "1440x900" "1280x1024"
Old 05-27-2012, 06:20 AM   #3
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You can try bigger resolutions if you want, but your TV might only go to 800x600.

BTW, even if you do manage to set the resolution higher, for technical reasons I wont go into it can look awful. Sometimes its not even true (you can set 1024x768, but it can be resized to 720x576 without the user knowing).

TVs aren't monitors, and there is a good reason (several really) why comuter monitors cost more than TVs.....


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