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After starting up, the resolution is set to 1280 x 960, but the native
resolution of my Acer AL1916W monitor is 1440 x 900, so I go System ->
Preferences -> Screen Resolution, click the drop down menu to select
1440 x 900, the screen blanks out, after waiting at least 60 seconds
(usually more) still nothing happens so I hard reset, after Ubuntu [8.04
Hardy Heron] starts the resolution is back to 1280 x 960.
This only occurs when I'm using the DVI-I cable, if I use VGA then 1440
x 900 works (I don't like using the VGA cable because image is not super
crisp, but I think that's a problem with the monitor's tuning hardware
since image is slightly ghosted in Windows XP aswell, DVI-I @ 1440 x 900
works in XP).
I'm quite sure I tried 1440 x 900 at both 60 Hz and 75 Hz refresh rates
and still the same thing happens.
The only ubuntu release that worked properly was 7.10, other releases
either didn't work at all or had issues.
I did get help from someone in the #ubuntu-ca group on IRC freenode but
could still not resolve the issue, so they suggested filing a bug.
a copy of /etc/X11/xorg.conf:
# 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" "pc101"
Option "XkbLayout" "us"
EndSection
Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
EndSection
Section "Device"
Identifier "Configured Video Device"
Driver "radeon"
Option "LVDSBiosNativeMode" "false"
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
********** end of xorg.conf **********
a copy of /var/log/Xorg.0.log should be attached
output of lspci -nn | grep VGA:
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc Radeon
RV200 QW [Radeon 7500] [1002:5157]
output of xrandr:
Screen 0: minimum 320 x 200, current 1280 x 960, maximum 1440 x 1200
VGA-0 disconnected (normal left inverted right x axis y axis)
DVI-0 connected 1280x960+0+0 (normal left inverted right x axis y axis) 410mm x
257mm
1400x1050 74.9
1280x1024 75.0 59.9
1440x900 75.0 60.1
1280x960 59.9*
1152x921 75.8
1280x800 74.9 59.8
1152x864 75.0 74.8
1024x768 75.1 70.1 60.0
832x624 74.6
800x600 72.2 75.0 60.3 56.2
640x480 75.0 72.8 66.7 60.0
720x400 70.1
S-video disconnected (normal left inverted right x axis y axis)
** Affects: xserver-xorg-driver-ati
Importance: Undecided
Status: New
** Affects: gnome-desktop (Ubuntu)
Importance: Medium
Status: Incomplete
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
--
system freezes after using Screen Resolution to set to 1440 x 900 with DVI
output (works from command line or with VGA)
https://bugs.edge.launchpad.net/bugs/234811
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