Ubuntu message: Video mode not supported, ends session
 

Ubuntu 7.04 (with its enhancements over the year) had been working ok till the new Yahoo mail kept repeating that the screen resolution had to be 1024x768.

No amount of editing the file in the directory X11 made any difference.
Next I looked up other solutions. Unfortunately the first one I tried on the command line, the command is forgotten, shut the system in a jiffy with a blank screen.

Reinstalling Ubuntu begins to start but then suddenly a message floats about the screen: Video mode not supported. I seem to have lost all the fancy stuff I had adorned the Desktop with.

Any workable cure would be appreciated with thanks.
Jiten B

Does your screen support 1024x768?

fix for Video Mode Not Supported
 

I had the same problem and thought I had tried everything, but naturally the last one was the one that worked. My CPU had been installed on my motherboard and tested by the shop I bought it from, so I assumed they had done it right, but what I found after pulling all the drives out of the case to get at the motherboard and memory was that they had set the jumpers (there were a lot!) to SDRAM instead of DDR, so I had to change them. And that did it! No more problems and the 3 volts instead of 2.5 volts did not seem to have hurt my 1.0 GB of memory, as far as I can tell.

1. ctrl+alt+F1 or F2 enter to console mode
2. joe /etc/X11/xorg.conf
3. input this contents as below:
4. save and reboot. Bingo!

# /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/CID"
FontPath "/usr/share/X11/fonts/100dpi"
FontPath "/usr/share/X11/fonts/75dpi"
# paths to defoma fonts
FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/CID"
EndSection

Section "Module"
Load "GLcore"
Load "i2c"
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" "pc104"
Option "XkbLayout" "us"
EndSection

Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/input/mice"
Option "Protocol" "ImPS/2"
Option "Emulate3Buttons" "true"
Option "ZAxisMapping" "4 5"
EndSection

Section "Device"
Identifier "ATI Technologies, Inc. Radeon X800 (R430 UO)"
Driver "ati"
BusID "PCI:5:0:0"
EndSection

Section "Monitor"
Identifier "Generic Monitor"
Option "DPMS"
HorizSync 28-51
VertRefresh 43-60
EndSection

Section "Screen"
Identifier "Default Screen"
Device "ATI Technologies, Inc. Radeon X800 (R430 UO)"
Monitor "Generic Monitor"
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"
EndSection

Section "DRI"
Mode 0666
EndSection