Comment 5 for bug 923552

Reproducing this in a qemu vm:

 * boot from a recent precise alternative amd64 iso
 * choose locale, username, etc
 * 'encrypt home directory' -> no
 * 'partitioning method' -> 'guided - use entire disk and set up encrypted lvm'
 * 'choose disk' -> choose virtual disk 1
 * 'write changes to disk' (to create a /boot partition?) -> ok
 * enter a passphrase -> whatever
 * 'amount of volume group to use for guided partitioning' -> accept the default, ie 100%

then I get an error at this point, on a scary red background:

'''!! Partition disks
No root file system
No root file system is defined.

Please correct this from the partitioning menu.
'''

In a sense this is ok and accurate, because I indeed have not created an lv for the root filesystem yet. However it's a bit bad this is shown after accepting all the defaults for one of the major installer paths (encrypted lvm).

 * continue
 * get a 'partition disks' window, showing a /boot, a crypto partition, and then also

encrypted volume (vda5_crypt)
#1 8.3 GB K lvm

 * choose 'configure the logical volume manager'
 * 'display configuration details' shows that it does have a root and swap lv, but trying to continue gives an error