Comment 2 for bug 223774

It turns out that the right xorg.conf works (but not the autogenerated from Hardy, and for Gutsy it must be present before the install configures xserver-xorg or it'll hang), provided the NoDDC option is present. I had that option when I tried in Hardy, but I got the xorg.conf wrong (it really sucks that you have no means of generating xorg.conf for cases where autodetection fails; this has been commented on on other bug reports, but you *really* need to do something about this. I would consider myself an advanced user but generating an xorg.conf without prompting (like that of dpkg-reconfigure xserver-xorg in gutsy and before) including not autodetecting, but selecting driver and general monitor type (e.g. 1024x768 @ 60Hz)) is quite more than I want to have to deal with. dpkg-reconfigure doesn't involve learning near as much as writing xorg.conf from scratch).

An I forgot to say that I'm using the alternate installer.

The xorg.conf I used in gutsy (and hardy when the default one failed) comes from http://michaelminn.com/linux/toshiba1800/ and is as follows:

 # xorg.conf (X.Org X Window System server configuration file)
 #
 # Custom file by Michael Minn

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

 Section "InputDevice"
  Identifier "Configured Mouse"
  Driver "mouse"
  Option "CorePointer"
  Option "Device" "/dev/input/mice"
  Option "Protocol" "ImPS/2"
 EndSection

 Section "Device"
     Identifier "Trident Microsystems CyberBlade/i1"
     Driver "trident"
     BusID "PCI:1:0:0"
     Option "NoDDC"
 EndSection

 Section "Monitor"
     Identifier "ToshLCD"
     Option "DPMS"
     HorizSync 30-71
     VertRefresh 50-100
 EndSection

 Section "Screen"
     Identifier "Default Screen"
     Monitor "ToshLCD"
     Device "Trident Microsystems CyberBlade/i1"
     DefaultDepth 16
     SubSection "Display"
         Depth 16
         Modes "1024x768"
     EndSubSection
     SubSection "Display"
         Depth 24
         Modes "1024x768"
     EndSubSection
     SubSection "Display"
         Depth 16
         Modes "800x600"
     EndSubSection
     SubSection "Display"
         Depth 24
         Modes "800x600"
     EndSubSection
 EndSection

 Section "ServerLayout"
  Identifier "Default Layout"
  Screen "Default Screen"
  InputDevice" "Configured Mouse"
 EndSection

Which I changed to :

# xorg.conf (X.Org X Window System server configuration file)
#
# Custom file by Michael Minn

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

Section "InputDevice"
 Identifier "Configured Mouse"
 Driver "mouse"
 Option "CorePointer"
 Option "Device" "/dev/input/mice"
 Option "Protocol" "ImPS/2"
EndSection

Section "Device"
    Identifier "Trident Microsystems CyberBlade/i1"
    Driver "trident"
    BusID "PCI:1:0:0"
    Option "NoDDC"
EndSection

Section "Monitor"
    Identifier "ToshLCD"
    Option "DPMS"
    HorizSync 30-71
    VertRefresh 50-100
EndSection

Section "Screen"
    Identifier "Default Screen"
    Monitor "ToshLCD"
    Device "Trident Microsystems CyberBlade/i1"
    DefaultDepth 24
    SubSection "Display"
        Depth 16
        Modes "1024x768" "800x600"
    EndSubSection
    SubSection "Display"
        Depth 24
        Modes "1024x768" "800x600"
    EndSubSection
EndSection

Section "ServerLayout"
 Identifier "Default Layout"
 Screen "Default Screen"
 InputDevice "Configured Mouse"
EndSection