Help getting refresh rate to 60hz

[Guest La_Parca]

For some reason I just cant seem to get the refresh rate down from 85hz to 60hz on the intel 830 965 drivers...in 800x600 cant even get it to display in 1024x768 but if i switch to the xorg vesa drivers everything is fine just a bit sluggish so any help would be appreciated and I tried altering the xorg.conf with no success .... maybe doing it all wrong... Help....

[pmpatrick]

First thing to do is make sure you have the correct monitor chosen for your system and that you have selected the intel "i810" driver not the 830 one you used before. That should get you to higher resolution. Then post your /etc/X11/xorg.conf file as configured for the i810 driver. If you know the horizontal sync and vertical refresh rate specs for your monitor, post that as well.

 

I have the same intel 965 chipset motherboard with intel integrated graphics and had to generate a custom modeline to get my refresh rate down to 60Hz. You may wind up having to do the same but it's not that hard. Also, i810 is he correct driver for this graphics chipset for the several distros I've tried. I believe in fedora 7 they offered the intel 830 as an alternative but it was marked "experimental" and not recommendedm i.e. it's still in development. The older i810 worked much better for me and that's what was auto-configured on every distro I tried.

[Guest La_Parca]

problem is i have only a projector and when i try to change the resoution to 1024x768x60 it only gives me signal out of range ... as far as i can tell can only handle 85hz max.... its an infocus x1a and max pc rez is 1024x768x60hz unfortunately the manual says nothing about the horizontal refresh rate...

 

here's my xorg.config

 

# File generated by XFdrake (rev 142098)

# **********************************************************************
# Refer to the xorg.conf man page for details about the format of
# this file.
# **********************************************************************

Section "Files"
# font server independent of the X server to render fonts.
FontPath "unix/:-1"

# minimal fonts to allow X to run without xfs
FontPath "/usr/share/fonts/misc:unscaled"
EndSection

Section "Extensions"
Option "Composite"
EndSection

Section "ServerFlags"
#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)
EndSection

Section "Module"
Load "dbe" # Double-Buffering Extension
Load "v4l" # Video for Linux
Load "extmod"
Load "type1"
Load "freetype"
Load "glx" # 3D layer
Load "dri" # direct rendering
EndSection

Section "InputDevice"
Identifier "Keyboard1"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
Option "XkbOptions" "compose:rwin"
EndSection

Section "InputDevice"
Identifier "Mouse1"
Driver "mouse"
Option "Protocol" "ExplorerPS/2"
Option "Device" "/dev/mouse"
EndSection

Section "Monitor"
Identifier "monitor1"
VendorName "Plug'n Play"
ModelName "InFocus X1a-A"
HorizSync 31.5-80
VertRefresh 50-85

# 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
EndSection

Section "Device"
Identifier "device1"
BoardName "Intel 810 / 815"
Driver "i810"
VideoRam 16384
Option "DPMS"

Option "XaaNoPixmapCache"
Option "May_Need_ForceBIOS" "1"
Option "XaaNoOffscreenPixmaps" "1"
EndSection

Section "Screen"
Identifier "screen1"
Device "device1"
Monitor "monitor1"
DefaultColorDepth 24

Subsection "Display"
	Depth 8
	Modes "800x600" "640x480" "480x360" "320x240"
EndSubsection

Subsection "Display"
	Depth 15
	Modes "800x600" "640x480" "480x360" "320x240"
EndSubsection

Subsection "Display"
	Depth 16
	Modes "800x600" "640x480" "480x360" "320x240"
EndSubsection

Subsection "Display"
	Depth 24
	Modes "800x600" "640x480" "480x360" "320x240"
EndSubsection
EndSection

Section "ServerLayout"
Identifier "layout1"
InputDevice "Keyboard1" "CoreKeyboard"
InputDevice "Mouse1" "CorePointer"
Screen "screen1"
EndSection

 

 

thanks for the reply and hope you can help some more.

 

Edit: actually found the info at their site ..... vsync 50-85hz and hsync 31.5-80khz

by the way... did you mean the xorg i810 or the intel 810 drivers? cuz this is done with the intel 810

Edited July 26, 2007 by La_Parca

[adamw]

VertRefresh 50-85

 

change that line to:

 

VertRefresh 60

[pmpatrick]

Use i810. I tried adamw's way with mine and it didn't work but try that first as it's a lot easier.

 

If it doesn't work, try generating a mode line and see if that helps. Open a console and run:

 

$ gtf 1024 768 60

 

You should get some output that looks something like this:

 

 # 1024x768 @ 60.00 Hz (GTF) hsync: 47.70 kHz; pclk: 64.11 MHz
 Modeline "1024x768_60.00"  64.11  1024 1080 1184 1344  768 769 772 795  -HSync +Vsync

 

Cut and paste that output into your "Monitor" section of xorg.conf like so:

 

Section "Monitor"
Identifier "monitor1"
VendorName "Plug'n Play"
ModelName "InFocus X1a-A"
HorizSync 31.5-80
VertRefresh 50-85

# 1024x768 @ 60.00 Hz (GTF) hsync: 47.70 kHz; pclk: 64.11 MHz
 Modeline "1024x768_60.00"  64.11  1024 1080 1184 1344  768 769 772 795  -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
EndSection

 

Next, go into XFdrake and select the higher resolution of 1024x768 for your output. When it asks if you want to restart the X server, say no. Check and make sure XFdrake doesn't edit out your inserted modeline in xorg.conf. I don't think it will but you never know. If it did, just cut and paste the modeline back in. In the "Display" subsection you should see new listings for "1024x768" for the various color depths. Log out and when you see the login screen hit Ctrl-Alt-Backspace just to make sure the X server has been restarted. Log back in and see if the whole thing works OK. Your modeline should force 60Hz refresh rate at 1024x768.

 

The modeline method was the only way I could get my refresh rate down from 75Hz.

[daniewicz]

Hmm. I was not aware of the gtf utility. Thanks pmpatrick

Edited July 27, 2007 by daniewicz

[Guest La_Parca]

thanks alot for the help but i tried what adamw said and no go still at 85hz now I tried to open up a terminal and run that entry but it just says command not found command not found.... could i just copy and paste that modeline you posted earlier and paste it into my xorg.conf and see it it works and no idea where xfdrake is ... sorry for the trouble but this will be my first attempt at linux and having a lot of trouble with the video card is my first ...jejeje.... im using mandriva free spring with gnome as my windows manager.. i will try to use your modeline but dont know where xfdrake is so ill just change the resolution through mcc and see if it works....

[Guest La_Parca]

sorry for the inexperience on my part but i finally got the modeline going for me but still no idea where xfdrake is jejeje..

is it the on in applications system configuration hardware screen resolution?

 

 

Edit: I dont know how this is going on but when i first installed mandriva it was giving me 60hz for the first couple of restarts then bam 85hz so i will reinstall it and see if it happens again...

Edited July 28, 2007 by La_Parca