change display resolution Centos 5

Hi,

I'm wondering how I can the display resolution on my Centos 5. The screen is stretched. I went to System->Administration->Display and then changed it from 1152x864 to 1920x1200. It states to logoff and then login. But nothing happened and the res is still 1152x864. How can I change this? I haven't rebooted yet though.

Thank you,
Vkimura
Victor KimuraSEO, Web DeveloperAsked:
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Jayachandran PalanisamyTechnical Consultant - LinuxCommented:
victor,

You can run the above command in GUI terminal window.

Jay
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Jayachandran PalanisamyTechnical Consultant - LinuxCommented:
Boot or switch to runlevel 3 and fix it, as root type something like;

cp /etc/X11/xorg.conf /etc/X11/backup.xorg.conf
system-config-display --reconfigue --set-resolution=1920x1200 --set-depth=16

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The first typed command makes a backup of the currect xorg.conf file just in case (always a good idea). The second resets or reconfigures the xorg.conf file.

OR change the same as per the steps you followed and reboot the server.

Jay
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Victor KimuraSEO, Web DeveloperAuthor Commented:
It didn't work.

I have this in my xorg.conf:
[root@seokingdomheaven X11]# cat xorg.conf
# Xorg configuration created by system-config-display

Section "ServerLayout"
        Identifier     "single head configuration"
        Screen      0  "Screen0" 0 0
        InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "InputDevice"
        Identifier  "Keyboard0"
        Driver      "kbd"
        Option      "XkbModel" "pc105"
        Option      "XkbLayout" "us"
EndSection

Section "Device"
        Identifier  "Videocard0"
        Driver      "r500"
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "Videocard0"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Depth     24
        EndSubSection
EndSection


In System->Preferences->Screen Resolution I have a maximum resolution of 1152x864. But System->Administration->Display I have a max of 1920x1200.

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Jayachandran PalanisamyTechnical Consultant - LinuxCommented:
Could you give  a try this.
system-config-display --reconfigue --set-resolution=1920x1200 --set-depth=24

Open in new window


If this not works you should make sure the followings.
1.Make sure that your graphichs chipset/card supported resolution(max) and
2.Once changed through GUI menu have you rebooted?
3.Which desktop edition that you are using? KDE or GNOME
4.If you tried above thru GNOME you could have a try with KDE
5.If nothing works then go with CentOS 6 or Ubuntu 11.xx(server editions)

Good luck :)

Jay
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Jayachandran PalanisamyTechnical Consultant - LinuxCommented:
Run this command after entered into your GUI session the find konsole and run it.
system-config-display --reconfigue --set-resolution=1920x1200 --set-depth=24

Open in new window


Jay
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Victor KimuraSEO, Web DeveloperAuthor Commented:
Hi Jay,

The first time I tried to run in terminal but I think your mentioning some GUI session and some other console. Where do I run that command? How do I get to that console?

Thank you,
Victor
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mohansahuCommented:
Hi,

if it not installed install it by
yum install xorg-x11-drivers

If your  CentOS 5 boots and has the low monitor resolution of 800x600 you need to run system-config-display and change it to "Generic" for video card. Then select a higher resolution.

After change the resolution then log-off and log again ,then only it will take effect.

MS
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Victor KimuraSEO, Web DeveloperAuthor Commented:
Hi mohansahu,

Where do i run

system-config-display --reconfigue --set-resolution=1920x1200 --set-depth=24

?

In the terminal as root?

Thanks
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mohansahuCommented:
Hi,

In the terminal run that  command prompt as root,  after change the screen resolution and ,log-off  & log-in again.

MS
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Victor KimuraSEO, Web DeveloperAuthor Commented:
Happy New Year btw,

Thanks. I was just looking into the onboard video chipset that I have:
Motherboard: Gigabyte Technology Co., Ltd.
Product Name: GA-MA78GM-US2H

Based on AMD 780G chipset, GA-MA78GM-US2H is integrated ATI Radeon HD 3200 (DX10) graphics engine and supports AMD Phenom...
http://ca.gigabyte.com/products/product-page.aspx?pid=2995&dl=1#ov

I'm using a VGA cable. I just read this on a forum:
The HD 3200 will support 2048x1153 on the DVI port just fine

Didn't know DVI supports higher resolution. Do you think that will resolve the problem? If I get a DVI cable?

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