Trying the alternate install CD for Lubuntu 12.10 for PowerPC on an old Powerbook G4. The install process seemed to go just fine, but trying to boot it up afterwards, I get this screen:
At this point it's frozen, and about 10 minutes later it just powers down.
Side note: If this is significant, originally tried the standard Lubuntu install disc. The Lubuntu logo shows up but eventually freezes and shuts down before the option screen appears.