Re: Changing resolution on laptop

On Mon, 2007-02-12 at 23:23 +0200, Dotan Cohen wrote:
On 12/02/07, Aaron Konstam <akonstam@xxxxxxxxxxxxx> 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@xxxxxxxxxxxxx>

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