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Old 10-26-2007, 07:49 AM   #1
dalmat
LQ Newbie
 
Registered: Dec 2005
Posts: 14

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Screen Resolution is wrong


I have a Dell Inspiron laptop with a ATI graphics card. The LCD screen is not working anymore, so I use a external Hitachi CM771 19" CRT instead. Luckily I can switch between screens directly from the hardware. The Fn+F8 does this.

I just installed Ubuntu 7.10 (Gutsy) but there is something wrong with the screen resolution.

System -> Preferences -> Screen Resolution:
1680x1050
1280x1024
1280x800
1280x768
1024x768
800x600
640x480

I reckognize the 1680x1050 which is the max resolution on the Dell LCD. So I suspect they are all for the Dell LCD. I have no idea where it comes from since it is not in the xorg.conf file.

I would like to have the correct 1600x1200 resolution or some other that works. The current one leaves shaddows on the screen (wrong sync-rate?).

I tried to generate a new xorg.conf, but it simply doesn't seem to matter what default screen resolution appears in it. Where does the Gnome Screen Resolution Preferences come from and how do I change it?

Code:
# Fallback X.org config file
# FIXME: include the wacom devices (would only add noise at the current
#        development stage)

Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"kbd"
	Option		"CoreKeyboard"
	Option		"XkbRules"	"xorg"
	Option		"XkbModel"	"pc105"
	Option		"XkbLayout"	"us"
EndSection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
	Option		"Device"	"/dev/input/mice"
	Option		"Protocol"	"ImPS/2"
	Option		"ZAxisMapping"	"4 5"
	Option		"Emulate3Buttons"	"true"
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
	Inputdevice	"Generic Keyboard"
	Inputdevice	"Configured Mouse"
  screen 0 "screen1" 0 0
EndSection
Section "Module"
	Load		"dri"
	Load		"v4l"
EndSection
Section "device" # 
	Identifier	"device1"
	Boardname	"ATI Radeon (fglrx)"
	Busid		"PCI:1:0:0"
	Driver		"ati"
	Screen	0
	Vendorname	"ATI"
	Option		"MergedFB"	"off"
EndSection
Section "screen" # 
	Identifier	"screen1"
	Device		"device1"
	Defaultdepth	24
	Monitor		"monitor1"
	SubSection "Display"
		Depth	24
		Modes		"1280x1024" "1600x1200"
	EndSubSection
EndSection
Section "monitor" # 
	Identifier	"monitor1"
	Vendorname	"Hitachi, Ltd."
	Modelname	"Hitachi CM771"
	Horizsync	31.0-96.0
	Vertrefresh	50.0-160.0
	Gamma	1.0
EndSection
Section "ServerFlags"
EndSection
 
Old 10-27-2007, 05:14 AM   #2
slackbat
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Registered: Dec 2005
Distribution: Slackware 14.2_64_multilib - freebsd - devuan
Posts: 85

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Hi

It looks to me that you might have it the wrong way round. This is mine.

Code:
Subsection "Display"
        Depth       24
        Modes       "1152x864" "1024x768" "800x600" "640x480"
        ViewPort    0 0
EndSubsection
You have

Code:
SubSection "Display"
		Depth	24
		Modes		"1280x1024" "1600x1200"
EndSubSection
Mine starts with the highest and incrementally reduces. Yours does not. You could also put in the values you have mentioned.

good luck.
 
Old 10-27-2007, 06:00 AM   #3
pixellany
LQ Veteran
 
Registered: Nov 2005
Location: Annapolis, MD
Distribution: Mint
Posts: 17,808

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I believe that SubSection "Display" only needs to have the highest resolution you plan to use.

I think having a smaller one first gives a movable window within a "virtual screen" sized by the larger entry. I have not played with this lately.
 
Old 10-27-2007, 01:34 PM   #4
dalmat
LQ Newbie
 
Registered: Dec 2005
Posts: 14

Original Poster
Rep: Reputation: 0
I tried removing one of the resolutions, so I now have:

Code:
SubSection "Display"
		Depth	24
		Modes		"1600x1200"
EndSubSection
But it makes no difference. How can it be there is a list in "Screen Resolution Preferences in Gnome?

System -> Preferences -> Screen Resolution:
1680x1050
1280x1024
1280x800
1280x768
1024x768
800x600
640x480

These are the resolutions for my widescreen LCD. They are obviously not from xorg.conf. How can I manually change these?.

Last edited by dalmat; 10-27-2007 at 01:36 PM.
 
  


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