Unable to mount LVM partitions after upgrade to FC2t2

[Xavier Bachelot]

Hi all,

After upgrading from FC1 to FC2 Test 2, I'm now unable to mount any LVM 
partition. The root fs is NOT on LVM, but all other partitions are on 
LVM. Boot breaks just after the fsck part. I reproduced this behavior on 
another machine.

If I boot in rescue mode, partitions are mounted correctly. I can 
unmount a partition, but can't mount it again :

# mount -a
mount /dev/Volume00/var_log is not a valid block device

# vgscan
vgscan -- LVM module/driver not loaded?

# modprobe lvm-mod
FATAL: Module lvm_mod not found

Converting to LVM2 did not make any good.

I know that upgrade is untested/unsupported but I welcome any hint on 
this. If you need some details, just ask.

TIA,

Xavier