[coreboot] T530 with discrete GPU

[David Hobach]

Hi all,

did anyone get the discrete GPU working on a T530 with coreboot?

All I got so far was a blank screen when trying to switch to "Discrete 
Only" with nvramtool. With "Integrated Only" it doesn't even show up in 
lspci.

Interestingly, both showed up on the first reboot after the "Discrete 
Only" change, but the blank screen happened after the first full 
shutdown. Hardware...

The main problem there:

Without dGPU support, the external display port on a T530 docking 
station is not driven at all - it is hardwired to the GPU, if present. 
So when buying one of those, it actually hurts to have a dGPU.

Best Regards
David