Review your favorite Linux distribution.
Go Back > Forums > Linux Forums > Linux - Newbie
User Name
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!


  Search this Thread
Old 03-22-2006, 11:39 PM   #1
Registered: Feb 2006
Location: oregon
Distribution: PIII fedora2 | P4 fedora2 | Thinkpad fedora2
Posts: 54

Rep: Reputation: 15
My screen is flickering in X

My screen has a slight flicker that is giving me a headache. Do I need to change the settings in the xorg.conf? Here is what I have right now.

Section "Monitor"
        #DisplaySize      320   240     # mm
        Identifier   "Monitor0"
        VendorName   "STN"
        ModelName    "S/T 76/77V"
        HorizSync    30.0 - 70.0
        VertRefresh  50.0 - 160.0
        Option      "DPMS"
Would raising the VertRefresh setting get rid of this fliker? If so, what should I change it to?
Old 03-23-2006, 07:56 AM   #2
Registered: May 2004
Location: NC USA
Distribution: Fedora 23 - Cinnamon Spin
Posts: 270

Rep: Reputation: 32
You need to set your HorizSync rate and your VertRefresh rate according to your monitors specs. You can get those specs off of your monitors install disk or owners manual. If you do not have either of these sources you could try to google your monitors make and model to get those specs. Edit the configuration file with the correct ranges and this should fix your problem.

Old 03-23-2006, 10:55 AM   #3
Senior Member
Registered: Jan 2003
Location: Devon, UK
Distribution: Debian Etc/kernel 2.6.18-4K7
Posts: 2,380

Rep: Reputation: 49
A flicker can also be caused by an electro-magnetic field in close proximity to the screen (CRT) this causes beams to bend towards or away from the field. Common example is a fairly strong speaker or some kind of motor.
Old 03-23-2006, 05:18 PM   #4
Registered: Feb 2006
Location: oregon
Distribution: PIII fedora2 | P4 fedora2 | Thinkpad fedora2
Posts: 54

Original Poster
Rep: Reputation: 15
I looked up the specs for the monitor and found that the sync and refresh rates are correct. I also found that the manufacturer suggests a 1024x768 85Hz setting. I changed to that in KDE and it works great. The screen is a bit smaller, but I can deal with that. Now how do I make the changes permanent for all X sessions? Here is my xorg.conf settings right now.

Section "Screen"
        Identifier "Screen0"
        Device     "Card0"
        Monitor    "Monitor0"
        SubSection "Display"
                Viewport   0 0
                Depth     1
        SubSection "Display"
                Viewport   0 0
                Depth     4
        SubSection "Display"
                Viewport   0 0
                Depth     8
        SubSection "Display"
                Viewport   0 0
                Depth     15
I don't understand what the Viewport setting is or why it is always set to 0 0. It isn't in the xorg.conf.example file. I also don't see anything about the resolution. Should I just add it in there? That seems a bit dangerous since I don't know what I am doing.


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
Laptop screen flickering BrettPower Linux - Laptop and Netbook 1 06-19-2007 10:27 AM
laptop screen flickering when suspending chado Linux - Laptop and Netbook 0 12-13-2005 09:12 AM
Gnome screen flickering thewonka Linux - General 0 12-08-2005 11:13 PM
Screen flickering odd Linux - Hardware 4 12-24-2004 09:00 PM
flickering screen BigDummy Linux - Newbie 1 03-19-2004 02:50 PM > Forums > Linux Forums > Linux - Newbie

All times are GMT -5. The time now is 06:14 PM.

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