grub: savedefault and boot once for F12
sean darcy
seandarcy2 at gmail.com
Sat May 8 19:57:03 UTC 2010
sean darcy wrote:
> Tom Horsley wrote:
>> On Sat, 08 May 2010 10:11:41 -0400
>> sean darcy wrote:
>>
>>> And it keeps booting F9. Any suggestions appreciated.
>> You are making the mistake of believing the stuff written
>> in the grub info file :-).
>>
>> The actual grub shipped with fedora has a savedefault
>> that works completely differently.
>>
>> Try running grub and doing a "help savedefault" to get
>> the real info.
>>
>> https://bugzilla.redhat.com/show_bug.cgi?id=212649
>
> Wow. This is a trap for the unwary.
>
> BTW, IMHO the grub cli help is also misleading:
>
> help savedefault
> savedefault: savedefault [--stage2=STAGE2_FILE] [--default=DEFAULT] [--once]
> Save DEFAULT as the default boot entry in STAGE2_FILE. If
> '--once' is specified, the default is reset after the next reboot.
>
> The brackets mean to me that it's optional. So you'd use --stage2 only
> if you're using some non-standard stage2 file.
>
> Also, BTW, if you do run savedefault without --stage2 there's no error
> message.
>
> But it also didn't work :(
>
> savedefault --stage2=/boot/grub/stage2 --default=2 --once
>
> reboot, and I'm back at F9.
>
> Two possibilities: 1. grub isn't booting F12
>
> 2. F12 is failing, and grub is booting F9 as the fallback
>
> So I upped the timeout to 60 seconds. Set default in grub.conf to 0, and
> rebooted:
>
> May 8 12:34:10 Server pcscd: readerfactory.c:1379:RFCleanupReaders()
> entering cleaning function
> May 8 12:34:10 Server pcscd: pcscdaemon.c:532:at_exit() cleaning /var/run
> May 8 12:37:24 Server kernel: imklog 3.20.2, log source = /proc/kmsg
> started.
> May 8 12:37:24 Server kernel: Initializing cgroup subsys cpuset
>
> So a reboot takes 3 mins, 10 secs, 190 seconds
>
> Then set default=saved, ran from grub cli
>
> savedefault --stage2=/boot/grub/stage2 --default=2 --once
>
> reboot.
>
> May 8 12:16:09 Server pcscd: readerfactory.c:1379:RFCleanupReaders()
> entering cleaning function
> May 8 12:16:09 Server pcscd: pcscdaemon.c:532:at_exit() cleaning /var/run
> May 8 12:18:23 Server kernel: imklog 3.20.2, log source = /proc/kmsg
> started.
> May 8 12:18:23 Server kernel: Initializing cgroup subsys cpuset
>
> 2 minutes, 20 secs.
>
> So it looks to me like grub is not booting F12 at all.
>
> Any help realllly appreciated.
>
> sean
>
Getting weirder.
grub.conf has 3 stanzas, first 2 are f9, 3rd f12.
savedefault --stage2=/boot/grub/stage2 --default=1
worked!! The second stanza booted (F9 with a different kernel).
But now on reboot it keeps booting the second stanza, even though each
stanza has:
savedefault 0
Second stanza:
title Fedora (2.6.27.24-78.2.53.fc9.i686)
root (hd0,0)
kernel /vmlinuz-2.6.27.24-78.2.53.fc9.i686 ro root=/dev/VolGroup00/LogVol00
initrd /initrd-2.6.27.24-78.2.53.fc9.i686.img
savedefault 0
With default=saved, shouldn't the first stanza come up on reboot???
This is a problem because it I do boot F12 and there's a problem, it's
harder to get back to F9.
sean
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