ubuntu 9.10 on an external usb drive: grub1 does not work

Posted by Toc on Super User See other posts from Super User or by Toc
Published on 2010-05-25T22:20:22Z Indexed on 2010/05/25 22:21 UTC
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I have installed Ubuntu on a partition of my external usb drive. Since I had problems with grub2, I have uninstalled it and installed grub1. But then the usb drive didn't boot anymore, and I am forced to the limited shell of grub1. If I write manually

kernel (hd0,4)/vmlinuz-2.6.31-15-generic root=/dev/sdb4 ro quiet splash
initrd (hd0,4)/boot/initrd.img-2.6.31-15-generic
boot

then Ubuntu is loaded, but if I execute the commands

root (hd0,4)
setup (hd0)

as explained at http://www.gnu.org/software/grub/manual/html_node/Installing-GRUB-natively.html#Installing-GRUB-natively, next time I boot from usb I am forced again to the grub limited shell. How can I restore a working grub?

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