This is not just a problem with the Thinkpad T400. I just had the same issue with my workstation machine, which is based on a ASUS P5Q-EM LGA 775 Intel G45 motherboard, using two SATA hard drives and an IDE DVD-RW.
However on this machine I could not find a workaround changing BIOS settings, and after trying each SATA/IDE configuration option eventually gave up.
This is a regression... earlier versions of Ubuntu installed on this hardware with no problem.
This is not just a problem with the Thinkpad T400. I just had the same issue with my workstation machine, which is based on a ASUS P5Q-EM LGA 775 Intel G45 motherboard, using two SATA hard drives and an IDE DVD-RW.
However on this machine I could not find a workaround changing BIOS settings, and after trying each SATA/IDE configuration option eventually gave up.
This is a regression... earlier versions of Ubuntu installed on this hardware with no problem.