Undefined video mode number:31a grub bug

[fab]

Binary package hint: grub

After upgrading to the beta release of ubuntu 9.04, here is what happen:

while grub loading, this message appears "undefined video mode number:31a"

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 "Monitor"
 Identifier "Configured Monitor"
EndSection

Section "Screen"
 Identifier "Default Screen"
 Monitor "Configured Monitor"
 Device "Configured Video Device"
 SubSection "Display"
  Virtual 2304 800
 EndSubSection
EndSection

# commented out by update-manager, HAL is now used
#Section "InputDevice"
# Identifier "Generic Keyboard"
# Driver "kbd"
# Option "XkbRules" "xorg"
# Option "XkbModel" "pc105"
# Option "XkbLayout" "fr"
# Option "XkbVariant" "oss"
#EndSection

# commented out by update-manager, HAL is now used
#Section "InputDevice"
# Identifier "Configured Mouse"
# Driver "mouse"
# Option "CorePointer"
#EndSection

# commented out by update-manager, HAL is now used
#Section "InputDevice"
# Identifier "Synaptics Touchpad"
# Driver "synaptics"
# Option "SendCoreEvents" "true"
# Option "Device" "/dev/psaux"
# Option "Protocol" "auto-dev"
# Option "HorizEdgeScroll" "0"
#EndSection

Section "ServerLayout"
 Identifier "Default Layout"
 Screen "Default Screen"
# commented out by update-manager, HAL is now used
# InputDevice "Synaptics Touchpad"
EndSection

Section "Device"
 Identifier "Configured Video Device"
EndSection

menu.list:
# menu.lst - See: grub(8), info grub, update-grub(8)
# grub-install(8), grub-floppy(8),
# grub-md5-crypt, /usr/share/doc/grub
# and /usr/share/doc/grub-doc/.

## default num
# Set the default entry to the entry number NUM. Numbering starts from 0, and
# the entry number 0 is the default if the command is not used.
#
# You can specify 'saved' instead of a number. In this case, the default entry
# is the entry saved with the command 'savedefault'.
# WARNING: If you are using dmraid do not use 'savedefault' or your
# array will desync and will not let you boot your system.
default 0

## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout 2

## hiddenmenu
# Hides the menu by default (press ESC to see the menu)
hiddenmenu

# Pretty colours
#color cyan/blue white/blue

## password ['--md5'] passwd
# If used in the first section of a menu file, disable all interactive editing
# control (menu entry editor and command-line) and entries protected by the
# command 'lock'
# e.g. password topsecret
## password --md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/
# password topsecret

#
# examples
#
# title Windows 95/98/NT/2000
# root (hd0,0)
# makeactive
# chainloader +1
#
# title Linux
# root (hd0,1)
# kernel /vmlinuz root=/dev/hda2 ro
#

#
# Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST

### BEGIN AUTOMAGIC KERNELS LIST
## lines between the AUTOMAGIC KERNELS LIST markers will be modified
## by the debian update-grub script except for the default options below

## DO NOT UNCOMMENT THEM, Just edit them to your needs

## ## Start Default Options ##
## default kernel options
## default kernel options for automagic boot options
## If you want special options for specific kernels use kopt_x_y_z
## where x.y.z is kernel version. Minor versions can be omitted.
## e.g. kopt=root=/dev/hda1 ro
## kopt_2_6_8=root=/dev/hdc1 ro
## kopt_2_6_8_2_686=root=/dev/hdc2 ro
# kopt=root=UUID=4876db2e-f6a8-4781-9b58-25be53140214 ro

## default grub root device
## e.g. groot=(hd0,0)
# groot=(hd0,0)

## should update-grub create alternative automagic boot options
## e.g. alternative=true
## alternative=false
# alternative=true

## should update-grub lock alternative automagic boot options
## e.g. lockalternative=true
## lockalternative=false
# lockalternative=false

## additional options to use with the default boot option, but not with the
## alternatives
## e.g. defoptions=vga=791 resume=/dev/hda5
# defoptions=quiet splash vga=794

## should update-grub lock old automagic boot options
## e.g. lockold=false
## lockold=true
# lockold=false

## Xen hypervisor options to use with the default Xen boot option
# xenhopt=

## Xen Linux kernel options to use with the default Xen boot option
# xenkopt=console=tty0

## altoption boot targets option
## multiple altoptions lines are allowed
## e.g. altoptions=(extra menu suffix) extra boot options
## altoptions=(recovery) single
# altoptions=(recovery mode) single

## controls how many kernels should be put into the menu.lst
## only counts the first occurence of a kernel, not the
## alternative kernel options
## e.g. howmany=all
## howmany=7
# howmany=all

## specify if running in Xen domU or have grub detect automatically
## update-grub will ignore non-xen kernels when running in domU and vice versa
## e.g. indomU=detect
## indomU=true
## indomU=false
# indomU=detect

## should update-grub create memtest86 boot option
## e.g. memtest86=true
## memtest86=false
# memtest86=true

## should update-grub adjust the value of the default booted system
## can be true or false
# updatedefaultentry=false

## should update-grub add savedefault to the default options
## can be true or false
# savedefault=false

## ## End Default Options ##

title Ubuntu jaunty (development branch), kernel 2.6.28-11-generic
root (hd0,0)
kernel /boot/vmlinuz-2.6.28-11-generic root=UUID=4876db2e-f6a8-4781-9b58-25be53140214 ro quiet splash vga=794
initrd /boot/initrd.img-2.6.28-11-generic
quiet

title Ubuntu jaunty (development branch), kernel 2.6.28-11-generic (recovery mode)
root (hd0,0)
kernel /boot/vmlinuz-2.6.28-11-generic root=UUID=4876db2e-f6a8-4781-9b58-25be53140214 ro single
initrd /boot/initrd.img-2.6.28-11-generic

title Ubuntu jaunty (development branch), kernel 2.6.27-11-generic
root (hd0,0)
kernel /boot/vmlinuz-2.6.27-11-generic root=UUID=4876db2e-f6a8-4781-9b58-25be53140214 ro quiet splash vga=794
initrd /boot/initrd.img-2.6.27-11-generic
quiet

title Ubuntu jaunty (development branch), kernel 2.6.27-11-generic (recovery mode)
root (hd0,0)
kernel /boot/vmlinuz-2.6.27-11-generic root=UUID=4876db2e-f6a8-4781-9b58-25be53140214 ro single
initrd /boot/initrd.img-2.6.27-11-generic

title Ubuntu jaunty (development branch), memtest86+
root (hd0,0)
kernel /boot/memtest86+.bin
quiet

### END DEBIAN AUTOMAGIC KERNELS LIST

[fab (charbonnier-fabien)]

problem resolved
not linked to upgrade to 9.04 released
sorry

[Jim Tarvid (tarvid)]

A similar bug shows up in a Natty i386 server install. Granted the problem is upstream and if you let it time out or press space you get to a usable screen but I just had a student beat this one into submission.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.