Laptop Display Resolution

[Oliver Ruebenacker]

Dear friends,

I have a Dell Latitude D820 laptop. Today, I changed the screen
resolution to something smaller using
Menu>System>Administration>Display, and I can not change it back. The
display used to be set to generic LCD display and the resolution - I
think - was set to 1680x1050. Now the display is set to generic LCD
panel 1024x768 and the highest resolution available is 1360x768. When
I change the monitor type, it simply says the change will not take
effect until I log out and in again, and it does not allow me to
change the resolution to something higher (even though the monitor
type is set to be a generic LCD with some higher resolution). When I
log out and in, the monitor type is set to what it was before (see
above).

Web search has not solved the problem. Neither was I able to find
out what monitor I have, nor what might be the problem. Video Card is
nVidia Corporation G72M.

Any help? Thanks!

Take care
     Oliver

[Brian Millett]

Oliver Ruebenacker escribío:
>  Dear friends,
>
> I have a Dell Latitude D820 laptop. Today, I changed the screen
> resolution to something smaller using
> Menu>System>Administration>Display, and I can not change it back. The
> display used to be set to generic LCD display and the resolution - I
> think - was set to 1680x1050. Now the display is set to generic LCD
> panel 1024x768 and the highest resolution available is 1360x768. When
> I change the monitor type, it simply says the change will not take
> effect until I log out and in again, and it does not allow me to
> change the resolution to something higher (even though the monitor
> type is set to be a generic LCD with some higher resolution). When I
> log out and in, the monitor type is set to what it was before (see
> above).
>
> Web search has not solved the problem. Neither was I able to find
> out what monitor I have, nor what might be the problem. Video Card is
> nVidia Corporation G72M.
>
> Any help? Thanks!
>  Take care
>  Oliver

I have a d820 running F8.  I have great resolution (1680x1050) using the nvidia 
drivers.
You can do one of two things:

1) run nvidia-xconfig to fix your xorg.conf file.

2) here is my /etc/X11/xorg.conf that you can read to see what to change on yours

# Xorg configuration created by system-config-display

Section "ServerLayout"
    Identifier     "single head configuration"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "AlwaysCore" "CorePointer"
    InputDevice    "Touchpad" "AlwaysCore"
EndSection

Section "Files"

# Multiple FontPath entries are allowed (they are concatenated together)
# By default, a font server independent of the X server is
# used to render fonts.
    ModulePath   "/usr/lib/xorg/modules/extensions/nvidia"
    ModulePath   "/usr/lib/xorg/modules/extensions"
    ModulePath   "/usr/lib/xorg/modules"
    FontPath     "unix/:7100"
EndSection

Section "Module"

##    Load           "dri"
    Load  "dbe"
    Load  "extmod"
    Load  "fbdevhw"
    Load  "record"
    Load  "freetype"
    Load  "type1"
    Load  "synaptics"
    Load  "glx"
##    Load           "GLCore"
EndSection

Section "ServerFlags"
    Option	    "AIGLX" "off"
EndSection

Section "InputDevice"

# Specify which keyboard LEDs can be user-controlled (eg, with xset(1))
#	Option	"Xleds"		"1 2 3"
# To disable the XKEYBOARD extension, uncomment XkbDisable.
#	Option	"XkbDisable"
# To customise the XKB settings to suit your keyboard, modify the
# lines below (which are the defaults).  For example, for a non-U.S.
# keyboard, you will probably want to use:
#	Option	"XkbModel"	"pc102"
# If you have a US Microsoft Natural keyboard, you can use:
#	Option	"XkbModel"	"microsoft"
#
# Then to change the language, change the Layout setting.
# For example, a german layout can be obtained with:
#	Option	"XkbLayout"	"de"
# or:
#	Option	"XkbLayout"	"de"
#	Option	"XkbVariant"	"nodeadkeys"
#
# If you'd like to switch the positions of your capslock and
# control keys, use:
#	Option	"XkbOptions"	"ctrl:swapcaps"
# Or if you just want both to be control, use:
#	Option	"XkbOptions"	"ctrl:nocaps"
#
    Identifier  "Keyboard0"
    Driver      "kbd"
    Option	    "XkbModel" "pc105"
    Option	    "XkbLayout" "us"
EndSection

Section "InputDevice"
    Identifier  "Mouse0"
    Driver      "mouse"
    Option	    "Protocol" "IMPS/2"
    Option	    "Device" "/dev/input/mice"
    Option	    "ZAxisMapping" "4 5"
    Option	    "Emulate3Buttons" "yes"
EndSection

Section "InputDevice"
    Identifier  "Touchpad"
    Driver      "synaptics"
    Option	    "Device" "/dev/input/event3"
    Option	    "Protocol" "event"
    Option	    "LeftEdge" "130"
    Option	    "RightEdge" "840"
    Option	    "TopEdge" "130"
    Option	    "BottomEdge" "640"
    Option	    "FingerLow" "7"
    Option	    "FingerHigh" "8"
    Option	    "MaxTapTime" "0"
    Option	    "MaxTapMove" "0"
    Option	    "EmulateMidButtonTime" "75"
    Option	    "VertScrollDelta" "20"
    Option	    "HorizScrollDelta" "0"
    Option	    "UpDownScrolling" "1"
    Option	    "MinSpeed" "0.70"
    Option	    "MaxSpeed" "1.20"
    Option	    "AccelFactor" "0.080"
    Option	    "EdgeMotionMinSpeed" "200"
    Option	    "EdgeMotionMaxSpeed" "200"
    Option	    "SHMConfig" "on"
    Option	    "Emulate3Buttons" "on"
EndSection

Section "Monitor"

### Comment all HorizSync and VertSync values to use DDC:
    Identifier   "Monitor0"
    VendorName   "Monitor Vendor"
    ModelName    "LCD Panel 1600x1200"
    HorizSync    31.5 - 90.0
    VertRefresh  50.0 - 70.0
    Option	    "dpms"
EndSection

Section "Device"
    Identifier  "nVidia Corporation G72M [GeForce Go 7400]"
    Driver      "nvidia"
EndSection

Section "Screen"
    Identifier "Screen0"
    Device     "nVidia Corporation G72M [GeForce Go 7400]"
    Monitor    "Monitor0"
    DefaultDepth     24
    Option	    "NoFlip" "True"
    Option	    "NvAGP" "1"
    Option	    "renderaccel" "1"
    Option	    "backingstore"
    Option	    "AddARGBGLXVisuals" "True"
    Option	    "DisableGLXRootClipping" "True"
    Option	    "UseEDIDDpi" "False"
    Option	    "AddARGBVisuals" "True"
    Option	    "NoLogo" "True"
    SubSection "Display"
    	Viewport   0 0
    	Depth     16
    	Modes    "1680x1050" "1280x1024" "1024z768" "800x600" "640x480"
    EndSubSection
    SubSection "Display"
    	Viewport   0 0
    	Depth     24
    EndSubSection
EndSection

Section "Extensions"
    Option	    "Composite" "enabled"
EndSection

[Oliver Ruebenacker]

Dear friends,

Thanks for the help. After installing nvidia-graphics and running
nvidia-xconf, I automatically got my 1680x1050 resolution back.

How I was able to get that resolution before that remains a mystery.

Take care
     Oliver

On Jan 22, 2008 9:17 PM, Oliver Ruebenacker  wrote:
>  Dear friends,
>
> I have a Dell Latitude D820 laptop. Today, I changed the screen
> resolution to something smaller using
> Menu>System>Administration>Display, and I can not change it back. The
> display used to be set to generic LCD display and the resolution - I
> think - was set to 1680x1050. Now the display is set to generic LCD
> panel 1024x768 and the highest resolution available is 1360x768. When
> I change the monitor type, it simply says the change will not take
> effect until I log out and in again, and it does not allow me to
> change the resolution to something higher (even though the monitor
> type is set to be a generic LCD with some higher resolution). When I
> log out and in, the monitor type is set to what it was before (see
> above).
>
> Web search has not solved the problem. Neither was I able to find
> out what monitor I have, nor what might be the problem. Video Card is
> nVidia Corporation G72M.
>
> Any help? Thanks!
>  Take care
>  Oliver
>
> --
> Oliver Ruebenacker, Post-Doc Researcher
> Center for Cell Analysis and Modelling
> http://www.ccam.uchc.edu/