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Display problem after installing Ubuntu 8.04

Asked by bishop77

Hi, after installing Ubuntu 8.04 I have a problem with my monitor. The image is displayed with thick lines splitting the screen into sectors and the colors look funny. Sometimes I see two mouse pointers on the screen

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Arnaud Soyez
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Bhavani Shankar (bhavi) said : 		#1

hello

can you please paste the output of:

lspci

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bishop77 (aarometa) said : 		#2

Hi Bhavani Shanker, the output is as follows:

00:00.0 Host bridge: VIA Technologies, Inc. P4M900 Host Bridge
00:00.1 Host bridge: VIA Technologies, Inc. P4M900 Host Bridge
00:00.2 Host bridge: VIA Technologies, Inc. P4M900 Host Bridge
00:00.3 Host bridge: VIA Technologies, Inc. P4M900 Host Bridge
00:00.4 Host bridge: VIA Technologies, Inc. P4M900 Host Bridge
00:00.5 PIC: VIA Technologies, Inc. P4M900 I/O APIC Interrupt Controller
00:00.6 Host bridge: VIA Technologies, Inc. P4M900 Security Device
00:00.7 Host bridge: VIA Technologies, Inc. P4M900 Host Bridge
00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI Bridge
00:02.0 PCI bridge: VIA Technologies, Inc. P4M900 PCI to PCI Bridge Controller (rev 80)
00:03.0 PCI bridge: VIA Technologies, Inc. P4M900 PCI to PCI Bridge Controller (rev 80)
00:0f.0 IDE interface: VIA Technologies, Inc. Unknown device 5337 (rev 80)
00:0f.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 07)
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev a0)
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev a0)
00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev a0)
00:10.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev a0)
00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)
00:11.0 ISA bridge: VIA Technologies, Inc. VT8237A PCI to ISA Bridge
00:11.7 Host bridge: VIA Technologies, Inc. VT8251 Ultra VLINK Controller
00:13.0 Host bridge: VIA Technologies, Inc. VT8237A Host Bridge
00:13.1 PCI bridge: VIA Technologies, Inc. VT8237A PCI to PCI Bridge
01:00.0 VGA compatible controller: VIA Technologies, Inc. Chrome9 HC IGP (rev 01)
04:04.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
80:01.0 Audio device: VIA Technologies, Inc. VIA High Definition Audio Controller (rev 10)

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Best Arnaud Soyez (weboide) said : 		#3

I think this is a xorg issue, your monitor or graphic card may not be supported or not correctly installed. You would have to find the correct frequencies and resolution and try to change them in /etc/X11/xorg.conf

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bishop77 (aarometa) said : 		#4

Thank you for your post but unfortunately (or fortunately) I am a total newbie. Please can you give a step-by-step guide on how to do this.

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bishop77 (aarometa) said : 		#5

This is as far as I got:

# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg

Section "InputDevice"
 Identifier "Generic Keyboard"
 Driver "kbd"
 Option "XkbRules" "xorg"
 Option "XkbModel" "pc105"
 Option "XkbLayout" "gb"
EndSection

Section "InputDevice"
 Identifier "Configured Mouse"
 Driver "mouse"
 Option "CorePointer"
EndSection

Section "Device"
 Identifier "Configured Video Device"
EndSection

Section "Monitor"
 Identifier "Configured Monitor"
EndSection

Section "Screen"
 Identifier "Default Screen"
 Monitor "Configured Monitor"
 Device "Configured Video Device"
EndSection

Section "ServerLayout"
 Identifier "Default Layout"
 Screen "Default Screen"
EndSection

Revision history for this message
Arnaud Soyez (weboide) said : 		#6

Take a look at this post :

http://ubuntuforums.org/showthread.php?t=285125

Setting frequencies could at least help but I'm not a 100% sure. But try fixing both your resolution and frequencies. Otherwise try with another monitor.

Let me guess you have a CRT monitor ? then try a LCD monitor.

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bishop77 (aarometa) said : 		#7

My monitor's a HP w19e LCD, I already tried another monitor without any improvement. I suspect that my display adapter - VIA Chrome9 HC IGP WDDM, is not supported. Any suggestions on how to work around this inconvenience?

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bishop77 (aarometa) said : 		#8

Hi weboide I tried your suggestion as set out here - http://ubuntuforums.org/showthread.php?t=285125 and it worked. After changing frequencies and resolution in /etc/X11/xorg.conf, I restarted graphics with CNTRL + SHIFT + Backspace and now I can change to the appropriate frequency and resolution via System > Preferences > Change Resolution. Thanks

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bishop77 (aarometa) said : 		#9

Thanks weboide, that solved my question.