[Bug 351475] Re: Undefined video mode number:31a grub bug

Jim Tarvid tarvid at ls.net
Sat Jul 9 16:49:23 UTC 2011


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.

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https://bugs.launchpad.net/bugs/351475

Title:
  Undefined video mode number:31a grub bug

Status in “grub” package in Ubuntu:
  New

Bug description:
  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

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