Changing resolution on laptop

[Aaron Konstam]

On Mon, 2007-02-12 at 23:23 +0200, Dotan Cohen wrote:
> On 12/02/07, Aaron Konstam <akonstam at sbcglobal.net> wrote:
> > On Mon, 2007-02-12 at 16:40 +0200, Dotan Cohen wrote:
> > > I've a Dell E1505 laptop with a 1050*1400 resolution LCD screen, and a
> > > regular external CRT monitor that can display video up to 768*1024.
> > > I'd like to plug the monitor into the laptop's output, but I need the
> > > output to display 768*1024. How would one go about ensuring that the
> > > correct resolution is used depending on whether or not the monitor is
> > > connected?
> > >
> > > Googling about led me to a bash script that changes screen resolution,
> > > but I'd prefer something automatic: LCD always get 1050*1400 and the
> > > CRT always gets 768*1024.
> > >
> > > Thanks in advance for any ideas.
> > >
> > This is not exactly automatic but its use depends on the answer to the
> > following question. When you plug in the external monitor does the
> > internal lcd screen cease working, If so one might do this.
> > <ctrl><Alt> + cycles through resolutions in your xorg.conf so if you had
> > the resolutions you mention above in your xorg.conf file it would be
> > easy to switch between them.
> 
> It only drives one display at a time, so I could switch between
> resolutions. My xorg.conf file has no screen resolutions:
> # Xorg configuration created by pyxf86config
> 
> Section "ServerLayout"
> 	Identifier     "Default Layout"
> 	Screen      0  "Screen0" 0 0
> 	InputDevice    "Keyboard0" "CoreKeyboard"
> 	InputDevice    "Synaptics" "CorePointer"
> EndSection
> 
> Section "InputDevice"
> 	Identifier  "Keyboard0"
> 	Driver      "kbd"
> 	Option	    "XkbModel" "pc105"
> 	Option	    "XkbLayout" "us"
> EndSection
> 
> Section "InputDevice"
> 	Identifier  "Synaptics"
> 	Driver      "synaptics"
> 	Option	    "Device" "/dev/input/mice"
> 	Option	    "Protocol" "auto-dev"
> 	Option	    "Emulate3Buttons" "yes"
> #	Option	    "UseShm" "true"
> 	Option	    "SHMConfig" "on"
> EndSection
> 
> Section "Device"
> 	Identifier  "Videocard0"
> 	Driver      "vesa"
> #	Driver      "radeon"
> EndSection
> 
> Section "Screen"
> 	Identifier "Screen0"
> 	Device     "Videocard0"
> 	DefaultDepth     24
> 	SubSection "Display"
> 		Viewport   0 0
> 		Depth     24
> 	EndSubSection
> EndSection
> 
You ar right but if you run system-config-display your file will be
changed so the last part will look like this:
Section "Screen"
        Identifier "Screen0"
        Device     "Videocard0"
        DefaultDepth     24
        Option      "passwordfile" "/root/.vnc/passwd"
        SubSection "Display"
                Viewport   0 0
                Depth     24
                Modes    "1600x1024" "1440x900" "1400x1050" "1280x1024"
"1280x960" "1280x800" "1152x864" "1152x768" "1024x768" "800x600"
"640x480"
        EndSubSection
EndSection

and you will be able to choose the resolutions you want to use by
removing the ones you don't want. That is the semi-automatic way to do
this , but of course you could just type the lines in with the right
resolutions, Then restart X.

-- 
Aaron Konstam <akonstam at sbcglobal.net>