Grub does not autoboot the default option after upgrade to 12.10

Posted by Petr Kozelka on Ask Ubuntu See other posts from Ask Ubuntu or by Petr Kozelka
Published on 2012-11-09T11:50:55Z Indexed on 2012/11/14 23:19 UTC
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Filed under:

upgrade

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grub2

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12.10

I recently upgraded Ubuntu from 12.04 to 12.10 and since that time, the system does not automatically boot. It always opens the boot menu, and I have to press Enter to make it boot Ubuntu.

It seems to be ignoring the timeout value, and using a 'neverending' timeout.

There are no other systems (no dual boot), only the options originally installed by default Ubuntu 12.04 installation.

My /etc/default/grub has only these effective options:

GRUB_DEFAULT='Ubuntu'
GRUB_HIDDEN_TIMEOUT=1
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=1
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""
GRUB_TERMINAL=console

I experimented with GRUB_DEFAULT, giving it values '0', '1', 'Ubuntu' but nothing helps.

Yes I always run update-grub afterwards.

How can I make the system booting again ?

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