no 'last good boot' entry in GRUB menu

Bug #284210 reported by Michael Kofler on 2008-10-16
32
This bug affects 5 people
Affects Status Importance Assigned to Milestone
grub (Ubuntu)
Wishlist
Unassigned

Bug Description

I have installed intrepid on various machines and just tested on three of them: only one has a 'last successful boot' entry in menu.lst, and even on this machine, there is neither a /boot/last-good-boot directory nor /lib/modules/last-good-boot; GRUB just says 'file not found' if I use 'last successful boot'

according to https://wiki.ubuntu.com/KernelTeam/removing-old-kernels , last-good-boot is implemented fully in Intrepid/8.10

is it?

Jithin Emmanuel (jithin1987) wrote :

I also have the same problem.
I first installed kubuntu 8.19 beta on a partition. After that I deleted my other partitions and merged them with my kubuntu partition. That screwed my grub and I had to grub-install from my live cd. After that there is no last good boot and As mentioned in the bug report i dont either have /boot/last-good-boot nor /lib/modules/last-good-boot

Changed in grub:
status: New → Confirmed
Jithin Emmanuel (jithin1987) wrote :

sorry kubuntu 8.10 beta

Steve Langasek (vorlon) wrote :

This spec was rolled back for intrepid due to problems with the implementation.

Jithin Emmanuel (jithin1987) wrote :

So this is not a bug. The feature itself has been removed?
Any plans for re introducing it?

takeda64 (takeda64) wrote :

If I want to create something like that by hand, which files & directories I should copy to make sure it's operational?

The reason why I want to do it is that recent kernel updates are just incremental updates to the same kernel. I personall experienced a problem when latest update broke the WiFi support (it was fortunately resolved in couple hours, but it was really troublesome)

I know it's devel relase so things like that are normal, that's why I want to protect myself from that in the future,
My laptop doesn't have cd-rom and floppy drives, so if kernel would make system unbootable, I'll have to play with PXE again :(

takeda64 (takeda64) wrote :

After looking at grub logfile I found that the setting to enable/disable this feature is located in /etc/defaults/kernel-helper-rc (I'm writing it from memory).

After commenting a line there, it comes back and appears to work as before.

Now the question is, what was the reason to disable it?
What I should look for? And how dangerous it is?
The changelog didn't mention much besides just disabling it.

manzur (sl-solaris) wrote :

i had the same problem with "Last successful boot", when are you going to implement it again?

Dimitrios Symeonidis (azimout) wrote :

the feature is disabled by a line in the file /etc/default/kernel-helper-rc
it was not considered stable by the ubuntu developers and was therefore disabled (but not removed)
anyone wishing to enable it again can simply edit this file

Changed in grub:
importance: Undecided → Wishlist
Dimitrios Symeonidis (azimout) wrote :

i have also updated the wiki page accordingly

takeda64 (takeda64) wrote :

Dimitrios, what kind of potential problems does it cause?
How safe is it?

> what kind of potential problems does it cause?
> How safe is it?

I don't think it's a safety problem, I think it was not considered
good enough to be used as a stable fall-back solution.

Savvas Radevic (medigeek) wrote :

What I mean is that it probably wasn't working as expected.

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