Bug#494383: grub-pc: Grub2 cannot find LVM volume groups with a dash (-) in the name

[root]

Package: grub-pc
Version: 1.96+20080724-5
Severity: important


Grub2 does not work on LVM if the LVM volume group has a dash in the
name. I have tried this on a clean install of Debian Lenny using the
Debian Installer beta2 netinst for amd64. I have one hard disk which
is one big PV for LVM:

* volume group "linux-vg" (or "linuxvg")
  * volume "boot"
  * volume "root"
  * volume "swap"

Because I have /boot on LVM, D-I installed Lilo for me and I installed
grub2 by hand:

# aptitude install grub-pc

Then I try to install it:

# grub-install /dev/sda
grub-probe: error: Unknown device linux--vg-boot
Autodetection of a file system module failed
Please specify the module with the option "--modules" explicitly

So, I do what it says:

# grub-install --modules="ext2 pc lvm" /dev/sda
grub-probe: error: Unknown device linux--vg-boot
grub-setup: error: Unknown device linux--vg-boot

However, when I install Lenny in the exact same way, only I name
the volume group "linuxvg" instead of "linux-vg" then it all
works just fine:

# grub-install /dev/sda
# update-grub
<output snipped>
# reboot
Welcome to Grub!

I have tried various other volume group names, both with and
without a dash in them. When the name contains a dash, grub2 fails.
When the name does not contain a dash, grub2 works.

-- Package-specific info:

*********************** BEGIN /proc/mounts
/dev/mapper/linuxvg-root / ext3 rw,errors=remount-ro,data=ordered 0 0
/dev/mapper/linuxvg-root /dev/.static/dev ext3 rw,errors=remount-ro,data=ordered 0 0
/dev/mapper/linuxvg-boot /boot ext3 rw,errors=continue,data=ordered 0 0
*********************** END /proc/mounts

*********************** BEGIN /boot/grub/device.map
(hd0)	/dev/sda
*********************** END /boot/grub/device.map

*********************** BEGIN /boot/grub/grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/update-grub using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
set default=0
set timeout=5
insmod lvm
set root=(linuxvg-root)
search --fs-uuid --set 07bbd91c-a0a9-4d9a-b90b-28f093798fca
if font /usr/share/grub/ascii.pff ; then
  set gfxmode=640x480
  insmod gfxterm
  insmod vbe
  terminal gfxterm
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=cyan/blue
set menu_color_highlight=white/blue
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_hurd ###
### END /etc/grub.d/10_hurd ###

### BEGIN /etc/grub.d/10_linux ###
insmod lvm
set root=(linuxvg-boot)
search --fs-uuid --set b04ccca6-97b5-4387-98d4-b5edb67aedc3
menuentry "Debian GNU/Linux, linux 2.6.25-2-amd64" {
	linux	/vmlinuz-2.6.25-2-amd64 root=/dev/mapper/linuxvg-root ro  
	initrd	/initrd.img-2.6.25-2-amd64
}
menuentry "Debian GNU/Linux, linux 2.6.25-2-amd64 (single-user mode)" {
	linux	/vmlinuz-2.6.25-2-amd64 root=/dev/mapper/linuxvg-root ro single 
	initrd	/initrd.img-2.6.25-2-amd64
}
menuentry "Debian GNU/Linux, linux 2.6.24-1-amd64" {
	linux	/vmlinuz-2.6.24-1-amd64 root=/dev/mapper/linuxvg-root ro  
	initrd	/initrd.img-2.6.24-1-amd64
}
menuentry "Debian GNU/Linux, linux 2.6.24-1-amd64 (single-user mode)" {
	linux	/vmlinuz-2.6.24-1-amd64 root=/dev/mapper/linuxvg-root ro single 
	initrd	/initrd.img-2.6.24-1-amd64
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file is an example on how to add custom entries
### END /etc/grub.d/40_custom ###
*********************** END /boot/grub/grub.cfg

-- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.25-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages grub-pc depends on:
ii  debconf [debconf-2.0]    1.5.22          Debian configuration management sy
ii  grub-common              1.96+20080724-5 GRand Unified Bootloader, version 
ii  libc6                    2.7-10          GNU C Library: Shared libraries
ii  liblzo2-2                2.03-1          data compression library
ii  libncurses5              5.6+20080713-1  shared libraries for terminal hand

grub-pc recommends no packages.

Versions of packages grub-pc suggests:
pn  desktop-base                  <none>     (no description available)
pn  os-prober                     <none>     (no description available)

-- debconf information:
  grub-pc/linux_cmdline: fillme
  grub-pc/chainload_from_menu.lst: true