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Old 10-19-2005, 06:48 PM   #1
Green Monkey
LQ Newbie
 
Registered: Oct 2005
Posts: 3

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Angry No Pic on my monitor


Please Help,
I think I would convert to true Linux user faster if I have 2 problems solved on Linux.
I have been using Suse on a CRT Monitor and it was fine but everytime I try to use it on a LCD monitor then there would be no pic at all. This happens even with the Live CD. I believe I need to twick something on my monitor but I don't know how.

Also can you please show me how to install software on an existing Linux OS. It should not be that hard, but I just dont know how to go about. I have unzipped some tarz file, seen the commend line, typed that sucker but nothing happened.

specs of my old computer
Duron 1.3G, 512meg SDram share memory for graphic at 32meg, Daewood LCD 17", 8 Gig HD

Linux SUSE 9.1 personal version
 
Old 10-19-2005, 07:08 PM   #2
jschiwal
LQ Guru
 
Registered: Aug 2001
Location: Fargo, ND
Distribution: SuSE AMD64
Posts: 15,733

Rep: Reputation: 670Reputation: 670Reputation: 670Reputation: 670Reputation: 670Reputation: 670
First check if you have the correct horizontal and vertical frequency ranges set for the LCD monitor. You could try running SAX2 as root from the console. First, try accepting the values that it initially comes up with, and see if you can start x windows.
# telinit 3
# sax2
#startx

There is a program that is a part of the xorg system called "gtf" that can calculate a modeline for you. Suppose that the native resolution of the LCD monitor is 1280x1024. To use this command to generate a modeline for 60 hz refresh:
gtf 1280 1024 60 -x
You will need to create a "Modes" section if it doesn't exist and add the line:
UseMode "<Modes>"
to the Monitor section.

Here is a snipped of a xorg.conf file from the web. I added some highlighting to point out how the sections refer to each other.

Code:
Section "Monitor"
Option "CalcAlgorithm" "CheckDesktopGeometry"
DisplaySize 370 230
HorizSync 29-33
Identifier "Monitor[0]"
ModelName "T4976171WX2 MONITOR"
Option "DPMS"
VendorName "LPL"
VertRefresh 43-72
UseModes "Modes[0]"
EndSection


Section "Modes"
Identifier "Modes[0]"
Modeline "640x480" 23.86 640 656 720 800 480 481 484 497
EndSection


Section "Screen"
DefaultDepth 24
SubSection "Display"
Depth 15
Modes "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "1024x768" "800x600" "768x576" "640x480"
EndSubSection
SubSection "Display"
Depth 32
Modes "640x480"
EndSubSection
SubSection "Display"
Depth 8
Modes "640x480"
EndSubSection
Device "Device[0]"
Identifier "Screen[0]"
Monitor "Monitor[0]"
EndSection
I'm including this simple example in case you don't have a "Modes" section, which might be the case.

What I do is use the gtf program like this:
gtf 1280 1024 60 -x >1280x1024
Then I will include the "1280x1024" file using vim at the appropriate place.

Lastly, be sure to back up your xorg.conf file before editing it. Then it it doesn't work, simply copy the backup over "xorg.conf" and start over.

Last edited by jschiwal; 10-20-2005 at 01:10 AM.
 
Old 10-23-2005, 12:01 AM   #3
Green Monkey
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Registered: Oct 2005
Posts: 3

Original Poster
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Thanks jschiwal

Thanks jschiwal,
I really appreciate your help which is so detail. It shows that you are a true friend. Thanks again!

I will give it a try.
 
  


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