Bug#542314: Acknowledgement (grub-pc: Default install has set root=(MASS1-usr))

[fzielcke at z-51.de]

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From: Felix Zielcke <fzielcke at z-51.de>
To: John Goerzen <jgoerzen at complete.org>, 542314 at bugs.debian.org
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Date: Wed, 19 Aug 2009 07:13:37 +0200
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Am Dienstag, den 18.08.2009, 18:38 -0500 schrieb John Goerzen:
> Hi,
> 
> I believe I have isolated the problems.
> 
> It was introduced between 1.96+20090725-1, installed on the working
> machine, and the version installed on this one.
> 
> It now looks for fonts under /usr.  This has multiple undesirable
> effects.
> 
> For one, it requires lvm to be present.  This makes grub scan the
> entire system looking for PVs.  This causes grub to appear to open a
> rescue screen and hang.  It also makes the boot process significantly
> slower as it spins up drives that otherwise wouldn't need to be.  It
> is also possible that the difference is attributable to /usr being on
> an encrypted filesystem on the machine where grub is working.

My fault. When we changed it in upstream to use the unicode font now by
default instead of the ascii one I forgot to change grub-pc's postinst
to copy the unicode one to /boot. That has been already fixed for the
next upload.

> Another problem is that grub has confusion when /boot is on (hd1) and
> grub is installed on the MBR of (hd0).  I had to make the BIOS boot
> from (hd1) for it to "sort of" work (it spent a long time at a bllank
> screen before finally going).  Eventually I was able to move /boot to
> (hd0), which fixed the issue.
> 
> -- John
> 

It shouldn't be a problem if your disks are randomly ordered every time.
search --set --fs-uuid sets the root variable to the filesystem with
that UUID.
And if you install grub to a different disk then your /boot is on UUIDs
are also used for the prefix, which is used to load the modules and
grub.cfg.