help with xorg.conf

[wendigt 0]

Hi,

 

I have installed RedHat Enterprise Linux AS 4 on a Dell Poweredge 6650, it has an ATIMach 64 video card and is using a Dell 15FP Rack FlatPanel monitor. I have reinstalled Linux twice already and both times the install goes smoothly but when I reboot the second time after the install, when X windows comes up the desktop gets squeezed into a small rectangular shape on the screen and the monitor displays this error message "Input Signal Out of Range, Please select 1024x768 60Hz for best performance". The error message doesn't go away until I exit Xwindows and go back to the command prompt. I am booting to runlevel 3 and the command prompt environment looks fine, it is only Xwindows that is having the display problem.

 

I have tried and tried to figure out if there is an error in the xorg.conf file, but nothing I try seems to work. This version of RedHat Linux doesn't use the XFree86 like other versions do and I am new to the xorg.conf file.

 

Here is a copy of the xorg.conf file:

 

# Xorg configuration created by system-config-display

 

Section "ServerLayout"

Identifier "single head configuration"

Screen 0 "Screen0" 0 0

InputDevice "Mouse0" "CorePointer"

InputDevice "Keyboard0" "CoreKeyboard"

EndSection

 

Section "Files"

 

RgbPath "/usr/X11R6/lib/X11/rgb"

FontPath "unix/:7100"

EndSection

 

Section "Module"

Load "dbe"

Load "extmod"

Load "fbdevhw"

Load "glx"

Load "record"

Load "freetype"

Load "type1"

Load "dri"

EndSection

 

Section "InputDevice"

 

Identifier "Keyboard0"

Driver "kbd"

Option "XkbModel" "pc105"

Option "XkbLayout" "us"

EndSection

 

Section "InputDevice"

Identifier "Mouse0"

Driver "mouse"

Option "Protocol" "IMPS/2"

Option "Device" "/dev/input/mice"

Option "ZAxisMapping" "4 5"

Option "Emulate3Buttons" "yes"

EndSection

 

Section "Monitor"

Identifier "Monitor0"

VendorName "Monitor Vendor"

ModelName "Dell 1500FP"

DisplaySize 304 228

HorizSync 24.0 - 60.0

VertRefresh 56.0 - 75.0

# Option "dpms"

EndSection

 

Section "Device"

Identifier "Videocard0"

Driver "ati"

VendorName "Videocard vendor"

BoardName "ATI Mach64"

EndSection

 

Section "Screen"

 

Identifier "Screen0"

Device "Videocard0"

Monitor "Monitor0"

DefaultDepth 24

SubSection "Display"

Depth 24

Modes "1024x768" "800x600" "640x480"

EndSubSection

EndSection

 

Section "DRI"

Group 0

Mode 0666

EndSection

 

 

 

 

Thanks for any help

[Dapper Dan 0]

Just for fun, have you tried "vesa" where "ati" is? Do you get a full screen then? You could try this: Comment out your vertical and horizontal rates and let xorg configure them the way it wants. I did this once with an Nvidia that was having similar problems and it worked.

[iamroot 0]

But if you use vesa, you wont get 3D acceleration and you wont get to use the full power of your graphic card. It's not a solution.

[Dapper Dan 0]

Originally posted by iamroot:

Quote:

But if you use vesa, you wont get 3D acceleration and you wont get to use the full power of your graphic card. It's not a solution.

Nor is it meant to be. It's only a means of trying to determine what the problem may or may not be.

[danleff 0]

How much video ram on this card? 8 mb? This is a server, so I don't thing 3D acceleration is an issue here.

 

1024x768 @ 60hz is what it needs to be set at. So vesa may work.

 

Dan, do you know how to set this in x-org, or by the command line?

 

Perhaps, redhat-config-display?

 

Then also set the default depth at 16?

[wendigt 0]

Thanks for your responses. I have set the xorg.conf to use the VESA driver. There is 8mb of RAM on the video card and I don't mind not being able to use the 3D acceleration, since this is a server I can't think of an instance where I would need it.

 

After I set the xorg.conf to use the VESA driver, I tried to start Xwindows but it gave me this error:

 

"Screens found, but none have a usable configuration".

 

Here is the Screen section:

 

Section "Screen"

Identifier "Screen0"

Device "Videocard0"

Monitor "Monitor0"

DefaultDepth 24

SubSection "Display"

Viewport 0 0

Depth 16

Modes "800x600" "640x480"

EndSubSection

SubSection "Display"

Viewport 0 0

Depth 24

Modes "1024x768" "800x600" "640x480"

EndSubSection

EndSection

 

 

I have also tried this with DefaultDepth set to 16

 

 

[wendigt 0]

Thanks for everyones input, but I have figured it out. The kernel parameter SHMMAX was the problem. There is 8GB of RAM in the server and Oracle recommends setting SHMMAX to half the size of physical RAM - so I set it to 4GB. Well, this must have been too much because SHMMAX set itself to zero without giving me an error message. So I went along thinking SHMMAX was 4GB when in reality it was set to zero. As soon as I discovered this I set SHMMAX to something smaller (2GB) and Xwindows was able to start up and the display was back to normal.

[ochoco 0]

Hello All,

 

I need some quick help, I have installed Fedora 3 on a dell intel server connected to a Dell 15fp mouse and keyboard combo. Everything installs fine however the mouse is acting funny when I boot to KDE or GNOME. Is there a mouse driver that I need to install for this. Any help you can give would be greatly appreciated.