Monitor switches off automatically in Ubuntu 8.04. Help!

[Arun the Gr8]

I recently installed Ubuntu 8.04, n since i m no pro of linux, i m not able to solve this problem of mine. My monitor, an old Samsung Samtron 55v 15" crt, automatically switches of in Ubuntu and even after trying everything i can it remains so. if i manually restart the pc, d montor starts workin again.

i dont think it is a hardware problem since it works well in xp. plz help me out.this is causin a lot of problems.

[NucleusKore]

I too have an old samtron 56V
Ubuntu has problems detecting the monitor geometry correctly

Note these values or print this page
http://monitory.eactive.pl/monitor,Samtron,55V

Open a terminal and run the following
sudo dpkg-reconfigure xserver-xorg

and go through it

If you find all this too complicated then do the following
1. Press alt and F2
2. Type gnome-terminal and press enter
3. type the following
cat /etc/X11/xorg.conf

and press enter

4. Copy and post the output you get here, then myself or someone can help you out

[Arun the Gr8]

Well dude the output is:

arun@arun-desktop:~$ cat /etc/X11/xorg.conf
# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg

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

Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
EndSection

Section "Device"
Identifier "Configured Video Device"
Option "UseFBDev" "true"
EndSection

Section "Monitor"
Identifier "Configured Monitor"
EndSection

Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
EndSection

Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen"
EndSection

// I just hope this will help //

[NucleusKore]

Well there's the problem, monitor section is almost blank.

Now I do not know how to manually enter the values of the monitor section. Maybe you can pm Praka123 with the link to this post, or wait and someone will answer you by evening.

OR

In the mean time, open Synaptic Package Manager and look for xorg-edit and install it. In that you can edit your xorg.conf file easily using the values for your monitor from here
http://monitory.eactive.pl/monitor,Samtron,55V

OR

Else you can try noting down these values or print this page
http://monitory.eactive.pl/monitor,Samtron,55V

Press Alt and F2
Type
gnome-terminal
and press ENTER

Type the following
sudo dpkg-reconfigure xserver-xorg
and press ENTER

You will have to enter your password and press ENTER to proceed. A wizard will open which you can go through. After finishing the xorg.conf file will be written automatically.

Then press Ctrl Alt Backspace to restart X
Login

You should be fine now

[praka123]

oh!I too have a SAMTRON 56V .use these lines below in your section "screen"

Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
DefaultDepth    24
    SubSection     "Display"
       Viewport     0 0
        Depth       24
	 Modes      "800x600"
    EndSubSection
EndSection

and also in section "monitor" change as follows:

Section "Monitor"
    Identifier     "S/T 57/56E/V"
    Option         "DPMS"
    HorizSync    30-55
    VertRefresh    50-120
EndSection

these are the correct options.also what is your graphics card?onboard?do you have compiz effects working?if not open a terminal and see the o/p of below command to make sure you have 3D gfx supported.

 glxinfo |grep direct

[Arun the Gr8]

arun@arun-desktop:~$ sudo dpkg-reconfigure xserver-xorg
[sudo] password for arun:
xserver-xorg postinst warning: overwriting possibly-customised configuration
file; backup in /etc/X11/xorg.conf.20080615183727

Now this is the output. All that it configures is the keyboard. After that it gives the above output. What can i do?

Can u plz give me ur GMAIL or YAHOO id so that i can chat with u directly, if u dont mind.

[praka123]

@arun:try what I have posted. with bullet proof Xorg used in latest Ubuntu Hardy ,dpkg-reconfigure simply dont work.

[Arun the Gr8]

Actually praka123 can u gimme ur GMAIL or YAHOO ID so that i can resolve my issues by directly talkin/chattin with u? plz...

[praka123]

there is nothing special open a terminal(in Applications>Accessories>Terminal) ,type and "enter" below:

gksudo gedit /etc/X11/xorg.conf

when prompted ,give your password which you used to log in to Ubuntu .
now you will see the xorg.conf file opened in gedit text editor.now follow my last post save the changes,exit .press CTRL+ALT+BKSPCE to restart X(display).