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Old 10-10-2006, 10:18 AM   #1
drgilberto
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Registered: Jan 2006
Location: St.Louis
Distribution: Ubuntu
Posts: 5

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Strange problem: lcd monitor highest resolution stopped working due to OCD changes


I have a pentium4 pc with an intel 810 graphics adaptor and a HP 1530 flatscreen 15 " monitor (I use the analog VGA connection)

I installed Dapper Drake 6.06 without problem, and the highest resolution (1024x768 @ 75Hz) was supported.

Then, one day, I played around with the OCD screen (the little monitor menu that pops up if you press the buttons on the monitor).

Since then, the screen simply does not work in the highest resolution any more. You see a garbled screen, it is like
the horizontally lines are too long, and thus every line just does not 'fit' on the screen.

The 'auto adjustment' does not help. And manually playing with the clock phase helps to create a regular image, but it is only half the width then normally.

The monitor is not broken, it works still fine on a windows PC.

If I boot a Ubuntu live CD, I have exactly the same problem. Thus it is not due to my software setting either.

xserver-xorg reconfiguration does not fix the problem either.

The monitor works still fine in 800x600 and 640x400, too. But what can I do to fix the high resolution.

Please help.

I have enclosed my /etc/X11/xorg.conf and my lspci

---------------------------------------------------------
# /etc/X11/xorg.conf (xorg 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 /etc/X11/xorg.conf manual page.
# (Type "man /etc/X11/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 "Files"
FontPath "/usr/share/X11/fonts/misc"
FontPath "/usr/share/X11/fonts/cyrillic"
FontPath "/usr/share/X11/fonts/100dpi/:unscaled"
FontPath "/usr/share/X11/fonts/75dpi/:unscaled"
FontPath "/usr/share/X11/fonts/Type1"
FontPath "/usr/share/X11/fonts/100dpi"
FontPath "/usr/share/X11/fonts/75dpi"
# path to defoma fonts
FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection

Section "Module"
Load "bitmap"
Load "ddc"
Load "dri"
Load "extmod"
Load "freetype"
Load "glx"
Load "int10"
Load "type1"
Load "vbe"
EndSection

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

Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/input/mice"
Option "Protocol" "ExplorerPS/2"
Option "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
Driver "wacom"
Identifier "stylus"
Option "Device" "/dev/wacom" # Change to
# /dev/input/event
# for USB
Option "Type" "stylus"
Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "InputDevice"
Driver "wacom"
Identifier "eraser"
Option "Device" "/dev/wacom" # Change to
# /dev/input/event
# for USB
Option "Type" "eraser"
Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "InputDevice"
Driver "wacom"
Identifier "cursor"
Option "Device" "/dev/wacom" # Change to
# /dev/input/event
# for USB
Option "Type" "cursor"
Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "Device"
Identifier "Intel Corporation 82915G/GV/910GL Express Chipset Family Graphics Controller"
Driver "i810"
BusID "PCI:0:2:0"
EndSection

Section "Monitor"
Identifier "hp L1530"
Option "DPMS"
HorizSync 30-63
VertRefresh 56-76
EndSection

Section "Screen"
Identifier "Default Screen"
Device "Intel Corporation 82915G/GV/910GL Express Chipset Family Graphics Controller"
Monitor "hp L1530"
DefaultDepth 24
SubSection "Display"
Depth 1
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 4
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 8
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 15
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "1024x768" "800x600" "640x480"
EndSubSection
EndSection

Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
InputDevice "stylus" "SendCoreEvents"
InputDevice "cursor" "SendCoreEvents"
InputDevice "eraser" "SendCoreEvents"
EndSection

Section "DRI"
Mode 0666
EndSection
--------------------------------------------------------
output from lspci:

0000:00:00.0 Host bridge: Intel Corporation 915G/P/GV/GL/PL/910GL Processor to I/O Controller (rev 04)
0000:00:02.0 VGA compatible controller: Intel Corporation 82915G/GV/910GL Express Chipset Family Graphics Controller (rev 04)
0000:00:02.1 Display controller: Intel Corporation 82915G Express Chipset Family Graphics Controller (rev 04)
0000:00:1c.0 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI Express Port 1 (rev 03)
0000:00:1c.1 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI Express Port 2 (rev 03)
0000:00:1d.0 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #1 (rev 03)
0000:00:1d.1 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #2 (rev 03)
0000:00:1d.2 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #3 (rev 03)
0000:00:1d.3 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #4 (rev 03)
0000:00:1d.7 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB2 EHCI Controller (rev 03)
0000:00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d3)
0000:00:1e.2 Multimedia audio controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) AC'97 Audio Controller (rev 03)
0000:00:1f.0 ISA bridge: Intel Corporation 82801FB/FR (ICH6/ICH6R) LPC Interface Bridge (rev 03)
0000:00:1f.1 IDE interface: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) IDE Controller (rev 03)
0000:00:1f.2 IDE interface: Intel Corporation 82801FB/FW (ICH6/ICH6W) SATA Controller (rev 03)
0000:40:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5751 Gigabit Ethernet PCI Express (rev 01)
 
Old 10-10-2006, 10:37 AM   #2
farslayer
Guru
 
Registered: Oct 2005
Location: Willoughby, Ohio
Distribution: linuxdebian
Posts: 7,228
Blog Entries: 5

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If it worked before you made changes to the settings in the monitor, have you tried using the FACTORY RESET option in the OSD menu to set everything in the monitor back to the default settings ?

From the User Manual
Quote:
When adjusting the Clock and Clock Phase value if the monitor images become distorted, continue adjusting the values until the distortion disappears. To restore the Factory Settings, Select YES from the Factory Reset menu in the on-screen display
I would start with that.. undo whatever it is that you done did...
 
Old 10-10-2006, 11:02 AM   #3
drgilberto
LQ Newbie
 
Registered: Jan 2006
Location: St.Louis
Distribution: Ubuntu
Posts: 5

Original Poster
Rep: Reputation: 0
Yes, I tried the factory reset. It is really weird, but fortunately I fixed the problem.

I rebooted with the SimplyMepis 6.0 Live CD and that distro (like Ubuntu with Xorg) used different Xorg settings. It worked though.

I copied the xorg.conf from the live CD distro to my Ubuntu system and restarted X and now it works again. Really strange.

The upshot is, aparently, that even though SimplyMepis 6.0 and Ubuntu 6.06 and Knoppix 5.0 all use relatively new X versions, only SimplyMepis recognized it right.
 
Old 10-10-2006, 06:33 PM   #4
J.W.
LQ Veteran
 
Registered: Mar 2003
Location: Milwaukee, WI
Distribution: Mint
Posts: 6,642

Rep: Reputation: 69
Out of curiousity, if you run a diff between the two files, it will identify the differences. It might be useful to determine exactly which parameters created the original problem
 
  


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