When using LVM and /usr is on a LV, a proper system start is not possible in case that ncurses had been built with GPM support. This is because LVM depends on ncurses which again depends on GPM: As `libgpm' is installed into /usr/lib which is not available at boot time, the boot process will fail. Once you actually tried to boot into the new system, you will be confronted with a b0rken system that you can't easily (as in non-trivially) repair. For the case that anyone reads this who is in search for a solution, here is how I fixed my system: I booted from the live cd, loaded in the device mapper module (modprobe dm-mod), initialized LVM and activated the necessary VGs (vgchange -ay), mounted the necessary LVs to their right place in /chroot/ (e.g. /dev/vg-FOO/usr to /chroot/usr), chrooted into that directory and emerged ncurses from there. But beware that you have to turn off gpm support (for example, by USE=-gpm emerge ncurses). Reproducible: Didn't try Steps to Reproduce: 1. 2. 3.
Sorry, I refreshed my browser unintentionally and thus this Bug is the Same as #84840. This one can and should be deleted.
*** This bug has been marked as a duplicate of 84840 ***
