Ubuntu
grub2 package

  1. Bug #439784
  2. Comment #50

Comment 50 for bug 439784

Revision history for this message
SwaJime (john-swajime) wrote : Re: invalid: environment block

Similar situation ...
With karmic on a dell mini-9, got the invalid environment block / failed to boot default entries.
Combining the steps shown in Zaki's post #11 above with info from http://grub.enbug.org/Grub2LiveCdInstallGuide :

Boot with Karmic LiveUSB
Ctrl-Alt-FN-F1
sudo -i
su - root
mkdir /mnt/boot
mount /dev/sda1 /mnt/boot
cd /mnt/boot/boot/grub
rm grubenv
grub-editenv grubenv create
grub-editenv grubenv set default=0
reboot
(remove LiveUSB *after* the shutdown completes)

thanks much guys :D