What happened to grub2?

[Tom H]

On Wed, Feb 6, 2013 at 11:53 AM, Adam Wolfe <kadamwolfe at gmail.com> wrote:


>> I've always assumed that booting into single-user mode gave you a
>> read-only "/"... I've rebooted a Gentoo VM with "S" appended and
>> that's indeed the case. I don't have any other distribution that I can
>> reboot at the moment to compare.
>>
>> I've just rebooted my 12.10 laptop with "S" appended and I ended up at
>> a read-write "/".
>>
>> I was expecting the Ubuntu recovery menu because it's a new install
>> and I havent't disabled it yet so I checked 10_linux and the
>> "(recovery mode)" stanzas are now adding "recovery" rather than
>> "single" (!). it must be an Ubuntu-specific option because I've never
>> seen it before and it boots into the Ubuntu friendly-recovery menu. If
>> you choose the "root shell" option, you get a root prompt and "/"
>> mounted read-only.
>>
>> I assuem from your email that the "root shell" option used to give you
>> a read-write "/" on 10.04. Check the sulogin (from the sysvinit-utils
>> package) and friendly-recovery changelogs.
>
> Correct.  As long as I've used Ubuntu (starting with 8.04) the recovery
> modes would mount / rw. I'll check out sysvinit-utils.

https://bugs.launchpad.net/ubuntu/+source/friendly-recovery/+bug/575469


>>> After choosing a recovery mode, doing whatever, then rebooting, it gets
>>> to the grub menu and sits. Like it's ignoring the GRUB_DEFAULT and
>>> GRUB_TIMEOUT values. But it's only after booting to a recovery mode.
>>> Choosing any other entry from grub, even the custom ones, then rebooting
>>> again, it will then boot the set default entry.
>>> Here's my full /etc/default/grub:
>>> name at changeme:~$ grep -v \# /etc/default/grub
>>> GRUB_DEFAULT=0
>>> GRUB_HIDDEN_TIMEOUT=0
>>> GRUB_HIDDEN_TIMEOUT_QUIET=true
>>> GRUB_TIMEOUT=3
>>> GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
>>> GRUB_CMDLINE_LINUX_DEFAULT="quiet"
>>> GRUB_CMDLINE_LINUX=""
>>
>> It sounds like "recordfail" is coming into play.
>>
>> What does "grub-editenv list" return when you're booted into recovery
>> mode?
>
> Very nice, sir. "recordfail=1".

:)