Display Problem

utkarshrawat · 12-10-2007, 02:55 AM

Hi
Iam facing problem regarding display in my system.Sometimes my screen
resolution become big & sometimes small .I meant that screen resolution is not fixed it automatically changes whenever i reboot.Sometimes 800X600
or "1024x768"

When i gave command

Code:

1:lspci

00:00.0 Host bridge: Intel Corporation 82946GZ/PL/GL Memory Controller Hub (rev 02)
00:01.0 PCI bridge: Intel Corporation 82946GZ/PL/GL PCI Express Root Port (rev 02)
00:02.0 VGA compatible controller: Intel Corporation 82946GZ/GL Integrated Graphics Controller (rev 02)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01)
00:1f.2 IDE interface: Intel Corporation 82801GB/GR/GH (ICH7 Family) Serial ATA Storage Controller IDE (rev 01)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 01)
04:00.0 Ethernet controller: Broadcom Corporation NetLink BCM5786 Gigabit Ethernet PCI Express (rev 02)

I tried to change MOde manually gedit /etc/X11/xorg.conf

Code:

Section "Screen"
	Identifier "Screen0"
	Device     "Videocard0"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     24
		Modes    "1024x768" "800x600" "640x480"
	EndSubSection

After that i reboot it ask for which mode u want to select .
But still it does the same.

pixellany · 12-10-2007, 07:15 AM

The "Screen" section needs to specify a monitor (I thought)

And the "Monitor" section needs to specify the correct horiz and vert. scan rates.

Please tell us what monitor and video card you are using, and post all the relevant sections of xorg.conf.

utkarshrawat · 12-10-2007, 07:40 AM

I think its nothing to do with monitor(E74 IBM).
Iam not sure ,do we have to upgraded install drivers

Code:

cat /etc/X11/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      "i810"
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "Videocard0"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Depth     24
                Modes    "1024x768" "800x600" 
        EndSubSection
EndSection

Code:

video card 
1:lspci

00:00.0 Host bridge: Intel Corporation 82946GZ/PL/GL Memory Controller Hub (rev 02)
00:01.0 PCI bridge: Intel Corporation 82946GZ/PL/GL PCI Express Root Port (rev 02)
00:02.0 VGA compatible controller: Intel Corporation 82946GZ/GL Integrated Graphics Controller (rev 02)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01)
00:1f.2 IDE interface: Intel Corporation 82801GB/GR/GH (ICH7 Family) Serial ATA Storage Controller IDE (rev 01)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 01)
04:00.0 Ethernet controller: Broadcom Corporation NetLink BCM5786 Gigabit Ethernet PCI Express (rev 02)

pixellany · 12-10-2007, 08:11 AM

I've never seen xorg.conf with no "Monitor" section---obviously it defaults to something.

Things to try:

Run xorgconfig
Enter a monitor section manually
---(for the 1st two you will need the monitor specs for horiz and vertical scan rates)
specify the "vesa" or "vga" driver in the device section

utkarshrawat · 12-10-2007, 10:04 PM

when i run the command

Code:

xorgconfig
bash: xorgconfig: command not found

I have no idea how to enter monitor section manually .

pixellany · 12-10-2007, 11:35 PM

I don't see where you stated which Linux distribution you are using. It is possible that xorgconfig has to be run as root---or it maybe is not installed. (Your package manager will tell you).

Here is part of my xorg.conf file. For all the details of the syntax, do "man xorg.conf".

Code:

Section "Monitor"
    Identifier "monitor1"
    VendorName "Viewsonic"
    ModelName "VP2030b"
    HorizSync 24-92
    VertRefresh 50-75
EndSection

Section "Device"
    Identifier "device1"
    VendorName "ATI Technologies Inc."
    BoardName "ATI Radeon"
    Driver "radeon"
    Option "DPMS"
EndSection

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

   <<snipped>> 

    Subsection "Display"
        Depth 24
        Modes "1600x1200" "1400x1050" "1280x1024" "1280x960" "1152x864" "1024x76
8" "832x624" "800x600" "640x480" "480x360" "320x240"
    EndSubsection
EndSection

cgtueno · 12-11-2007, 06:26 AM

December 11, 2007

Hi

pixellany appears to be correct in his advice.

The monitor section is required to specify the Horizontal Sync and Vertical Refresh parameters for the connected monitor.

Unless the monitor parameters have been specified then the resolution
that X establishes for the desktop on start up should be a low resolution. (Some distros I run default to 800 x 600)

Since any restart of X (ie machine reboot, logout of X etc) will result
in the startup processing of the X config file, the resolution will possibly differ from any temporary change of desktop resolution you have made from your distro's desktop tools prior to logout or shutdown.

The standard man pages on X in most distros provide a useful explanation of the makeup of the X config file.

Although you are using a single display card and monitor in your system, you might also like to read the Linux How To
"Xinerama-HOWTO, Using Xinerama to MultiHead XFree86 v.4.0+"
at the LDP (Linux Documentation Project)
http://tldp.org/HOWTO/HOWTO-INDEX/howtos.html

The reason I suggest you read this document is because it details the relationships between the X configuration file sections you are using, and their purpose/function, and relationships between the sections.
There are also a couple of useful examples in the appendix at the end.

For further assistance would you please post the name and version of the distribution you are using, and the version of X that you are using.
(eg. $ X -version)

Note that under X version 4+ you can also run the configuration tool
by:
installing your display cards, connecting the monitors
stopping X
logining into your system as root
In a command shell
Backing up your X configuration file
Generating a configuration file with the command
$ X -configure
Testing the new X configuration file
and if satisfactory replacing your old configuration file with the new one.

Hope that helps, best of luck

Chris