So I've now connected the X230 to my U2414h and am getting strain 🙁. (ditherig switched on and using 2012 driver)
One thing I have noticed is the Thinkpad BIOS is a post W10 2015 version. The original BIOS for the X230 was released in May 2012.
AFAIK the Intel Integrated VBIOS version is dependent on the motherboard BIOS - so a downgrade may work?
This wasn't an expensive machine but don't really want to brick it - I am super curious to know if a downgrade would make it comfortable.