LinuxQuestions.org
Download your favorite Linux distribution at LQ ISO.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie
User Name
Password
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!

Notices


Reply
  Search this Thread
Old 12-24-2007, 01:15 PM   #1
Kharl
LQ Newbie
 
Registered: Apr 2006
Posts: 3

Rep: Reputation: 0
Question X Server Configuration Question


Greetings to all, and thanks for your time. : )

I have a mildly borked display that will flicker on and off, however, I managed to get it working in windows by changing the following values in the Nvidia Control Panel:

Code:
 
Horizontal Front Porch: 48
Vertical Front Porch: 3
Active Horizontal Pixels: 1600
Active Vertical Lines 1200
Horizontal Total: 1760
Vertical Total: 1235
Horizontal Sync Width: 32
Vertical Sync Width 4
Horizontal Sync Polarity: (-)
Vertical Sync Polarity: (+)
Horizontal Scan Rate: 74.10
Pixel Clock: 130.0041
A screencap of the config panel can be found here

The question is, then, how do I stick these values into the X config for this screen?
 
Old 12-24-2007, 08:42 PM   #2
tommytomthms5
Member
 
Registered: Sep 2007
Distribution: debian based
Posts: 308

Rep: Reputation: Disabled
so are you dual booting windows and linux if so what flavor of linux?
 
Old 12-25-2007, 12:39 PM   #3
Kharl
LQ Newbie
 
Registered: Apr 2006
Posts: 3

Original Poster
Rep: Reputation: 0
After further research, I managed to find the solution to this issue. I figure I might as well followup and document it, incase someone else runs into the same issue. For more background, the Distro I am using is Ubuntu 7.10, however, as it deals with the X server, it should work with most distros. The specific problem is with the Syncmaster 204B ( seems some of them are defective, they will flash on and off with off times of over 1 second ). Aswell, I am setting this up with another monitor using Nvidia's TwinView, so the settings are a bit more different than usual.

The solution to this is to change the moniter's timings to CVT-Reduced Blanking. ( Found in the thread: http://www.nvnews.net/vbulletin/show....php?t=82982#9

You can get the timing ( in this case for 1600x1200 ) by typing

Code:
 cvt 1600 1200 60 -r
If your distro doesn't have this program, it can be found at http://www.uruk.org/~erich/projects/cvt/.

The output of which is placed under the "Moniter" section of the xorg.conf file, after a ModeLine. ( In my case, I'm using Nvidia's Twin view, which to me seems a bit odd as only one monitor is defined, but it seems that you keep this defined under the one monitor section. )

Code:
ModeLine "1600x1200_59.92_rb" 130.2 1600 1648 1680 1760 1200 1203 1207 1235 +hsync -vsync
Keep in mind, I believe this is monitor specific, so generate your own output using the cvt command.

Next, the mode should be put in a "Display" section, which seems to usually be a subsection of "Screen".

Code:
Modes "1600x1200_59.92_rb"
For me, this doesn't work as I'm using a TwinView implementation, which seems to define a single display with "metamodes". In my case, the code was defined under "Screen", NOT "Display", as such:

Code:
 Option "metamodes" "CRT: nvidia-auto-select +0+0, DFP: 1600x1200_59.92_rb +1280+0"
It would seem that each monitor is labeled initially, followed by a colon, then the mode, offset, then seperated by a comma. I'm not entirely sure where the label is defined, however, I was able to find it in my nvidia-settings under display configuration, they were labelled CRT-1(Its not a CRT, but whatever floats the config's boat, I guess) and DFP-0.

Finally, so that the setting won't try and shift towards those in the monitor's EDID, under the section "Device", we need to put the following code to get it to use the exact timing instead of the EDID ones.

Code:
Option "ExactModeTimingsDVI" "yes"
Save it to your xorg.conf, reboot, and pray to whatever diety you worship.

Anyhow, sorry if that was a bit verbose, I just wanted to keep a record of the solution I found incase another poor sap runs into a similar issue. Merry Christmas to all of ya!
 
  


Reply

Tags
blanking, config, syncmaster, xorg


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
Question of proxy server configuration bluesurfer Linux - Server 7 06-29-2007 08:28 AM
pppoe server+radius server configuration ye_adam Linux - Networking 2 01-12-2006 02:36 PM
name server in Slackware. Configuration question zyrtech Slackware 4 05-16-2003 09:26 AM

LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie

All times are GMT -5. The time now is 08:28 AM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Open Source Consulting | Domain Registration