I would like to change screen refresh rate to 75Hz
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These are the specs and your X configuration is correct from that perspective.
Use video timing calculator to calculate your modelines.
Select the resolution and click 'calculate' It will show a modeline under heading 4 that you can copy to your X config file (before the first modeline).
Let us know if it works.
Last edited by Wim Sturkenboom; 01-24-2006 at 07:12 AM.
I've changed xorg.conf to this (changed only 1 line... tell me if this correct)
# File generated by XFdrake.
# Refer to the XF86Config man page for details about the format of
# this file.
# Multiple FontPath entries are allowed (they are concatenated together)
# By default, Mandrake 6.0 and later now use a font server independent of
# the X server to render fonts.
#DontZap # disable <Crtl><Alt><BS> (server abort)
AllowMouseOpenFail # allows the server to start up even if the mouse does not work
#DontZoom # disable <Crtl><Alt><KP_+>/<KP_-> (resolution switching)
Load "dbe" # Double-Buffering Extension
Load "v4l" # Video for Linux
Load "glx" # 3D layer
Load "dri" # direct rendering
Option "XkbModel" "pc105"
Option "XkbLayout" "us,il"
Option "XkbOptions" "grp:alt_shift_toggle,grp_led:scroll,compose:rwin"
Option "Protocol" "ExplorerPS/2"
Option "Device" "/dev/mouse"
Option "ZAxisMapping" "6 7"
VendorName "Plug'n Play"
ModelName "Philips 170B"
# Monitor preferred modeline (60.0 Hz vsync, 64.0 kHz hsync, ratio 5/4)
Modeline "1280x1024" 135 1280 1296 1440 1688 1024 1025 1028 1066 +hsync +vsync
# TV fullscreen mode or DVD fullscreen output.
# 768x576 @ 79 Hz, 50 kHz hsync
ModeLine "768x576" 50.00 768 832 846 1000 576 590 595 630
# 768x576 @ 100 Hz, 61.6 kHz hsync
ModeLine "768x576" 63.07 768 800 960 1024 576 578 590 616
BoardName "ATI Radeon (fglrx)"
Virtual 1280 1024
Virtual 1280 1024
Virtual 1280 1024
Virtual 1280 1024
InputDevice "Keyboard1" "CoreKeyboard"
InputDevice "Mouse1" "CorePointer"
Shall I keep the first mode line or it does not matter?
After I went to (right click)--> Configure Desktop --> Display --> Refresh Rate was still only 60HZ... Was it because I havn't done restart since? or maybe because I deleted the first mode line? or maybe it will stay 60HZ but will actually do 75 HZ?
I noticed that in your first post you said that you are using an LCD monitor. There is a good chance that your monitor will not support 75 Hz. If you have shopped for monitors lately you may have noticed that they are starting to list the time that it takes for a pixel to change from white to black. Older monitors didn't tell us that because they took a long time and because they were very similar. If you want an LCD that will support 75 Hz then you will need a monitor that can change pixels from white to black in 8ms. That happens to be the fastest rate that I've seen advertised on any LCD monitors.
Any time that you change the settings for your monitor you should read the monitor's user guide. It will tell you the refresh rate, RAMDAC setting, etc. that you need to create your XF96Config modelines. If you set the refresh rate or the modeline timings too high you can destroy your monitor.
Please advise... my eyes are turnning red and I'm not joking!
I really can't believe that having an LCD monitor at 60 Hz is hurting your eyes. That might be true in a CRT because the pixels are constantly changing brightness but an LCD doesn't do that. In an LCD all of the pixels remain at a constant brightness until the graphic card tells the pixel to change. So 60 Hz on your LCD isn't hurting your eyes. I have my LCD monitors set at 60 Hz and I use them all day without any problems.
Last edited by stress_junkie; 01-24-2006 at 09:26 AM.