Kernel update fails due to grub update

[Matthew Wyneken]

LTSP client is running Ubuntu 11.04

I had problems during an update in the chroot that wanted to update to kernel 2.6.38-11.50. This was the first time a kernel update was performed on this image so it's the first time I could run into this problem.

The installation process runs /etc/kernel/postinst.d/zz-update-grub, which exits with an error because it can't find the root partition. There is no root partition mounted because the update is performed in chroot.

I had the same problem when I tried to perform the update on a running client system. In this case the problem was due to root being on an aufs disk rather than on an actual harddisk.

I came to the conclusion that an LTSP image doesn't have to have a working grub because it doesn't boot from disk. My solution: „chmod -x /etc/kernel/postinst.d/zz-update-grub“.

If my thinking is correct I suggest that zz-update-grub be removed from the directory when the LTSP client tree is first created.

[Alkis Georgopoulos (alkisg)]

Fixed in LTSP 5.3. You can now use `ltsp-chroot -m` to have /dev mounted so that the grub postinst doesn't fail. I'm opening a task to the grub package though, as I think that it shouldn't fail when it doesn't detect any devices, it should consider it the same as not selecting any device at its debconf dialog.

[Launchpad Janitor (janitor)]

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

[dino99 (9d9)]

This is no more a supported version; and grub legacy upstream is also stopped, only receiving possible random fixes locally