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Old 03-18-2008, 09:42 AM   #1
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Unhappy How to change my resolution to 1024x768x85 Hz?????????? please help me!!!


I'm new in the linux domain that's for a start...:P And till now i was using windows XP . My monitor worked perfectly in XP at 1024x768x85 Hz but now i'm surprised to see that in kubuntu 7.10 i have a problem with this.
My screen works now at 1024x768x72 Hz and i dont really like it at all.

The refresh rate goes higher (at 85Hz) only at 640x3xx i dont know exactly.

From what i've read till now i understand that it has to do with a certain file named xorg.file bla bla. the major question is now HOW TO change it to run at 1024x768x85 Hz? i probably need an entire code to enter somewhere... in the console or i dont know where ...i dont know so please if u can help me and i guess you guys rule u can help me out and tell me what to do step by step...if it's possible after all. Thanks alot boys'girls...BBYE and please once again help. bbye again...
Old 03-18-2008, 09:48 AM   #2
Registered: Nov 2007
Location: GMT -5, who wants to know
Distribution: Gentoo, Debian, BSD, Slack
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Welcome to LQ!
Old 03-18-2008, 10:58 AM   #3
Happy Gimper
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Location: Japan
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How X window system work

Hi, codename47. I'm Happy Gimper.

If you are new to linux, there is something you need to know about how linux shows you desktop screen.

On linux system, there is a server program called "X" or "Xorg" which manages your display and shows you desktop environment (GUI) such as Gnome and KDE. (more details on wikipedia:X windows system) As you know, its configuration file is /etc/X11/Xorg.conf (on debian). However, you cannot change resolution simply by editting the configuration file. What you can do by editting xorg.conf is "define" resolution for each video device. In most cases, this is pre-configured and the first resolution mode that meets the requirements is used.

If you cannot find where xorg.conf is on you distribution, see man page for xorg.conf.(I mean, do "man xorg.conf" on the console.) It has various information you need to know about configuring X, especially, "Mode" in the "DISPLAY SUBSECTION" is a MUST-SEE. There is the ANSWER.

Also, if you are new to LQ, remember that you should mention your system information such as the contents of xorg.conf (especially when concerning graphics), the output of "dmesg",distribution etc.
if you are new to linux, READ DOCS anyway. do "man" for everything and read everything and then you'll be happy.

if you don't know the usage of "man", see man page for "man".

Enjoy Linux!!
Old 03-18-2008, 11:16 AM   #4
Stéphane Ascoët
Registered: Feb 2004
Location: Orleans, 120 km south of Paris
Distribution: Mandrake, Freeduc (the one I'm making), Slackware, MacOS X
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Smile Another link to compute the maximum values of the screen

Originally Posted by b1f30 View Post
With this one, we can use all the capabilities of the screen:
Old 03-18-2008, 12:14 PM   #5
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Be very careful with xorg file. During my first 3 month with linux I tried to change settings from xorg and crashed my machine twice. If you installed linux without setting out a separate home partition than you could loose all your files... restoring from backup did not work for me.
Old 03-19-2008, 01:08 AM   #6
Happy Gimper
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How to edit xorg.conf when X corrupted

During my first 3 month with linux I tried to change settings from xorg and crashed my machine twice.
crashed twice for xorg configuration failure???

I DID crashed my knoppix machine several times but it doesn't have anything to do with X. All it does is managing display.
I assume that he is using unstable version or that the system crashed was caused by some other reason.

However, what he says is not necessarily wrong.:
If you failed to edit xorg.conf properly, X cannot work therefore you cannot even get the graphical login prompt (where you type username/password and enter). In such case, what you can do is to get the X work all right by reeditting the xorg.conf file WITHOUT MOUSE BUT ONLY KEYBOARD on the console. I mean:
"If you saw your graphical interface corrupt, you need to press ctrl-alt-f1 (choose one of f1-f6) to open virtual console. There you can prompted to enter username/password. Login as root and edit xorg.conf with 'vi /etc/X11/xorg.conf'. "

Like I always say, manpage will be a great help for you there.


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