GeForce GTX 1050 Ti: Boot to graphics / window manager works with only HDMI plugged in...

[yllapilate]

HA! Well very good news here guys. Got all three monitors working simultaneously. It turned out that the DisplayPort problem was actually someone else sticking their fingers in the pie and they changed VGA cables on me to the DisplayPort adapter without my knowing.

The real solution is simply to enable and use Legacy Support. Following that all three monitors work fine and BOOT FINE after disabling the kernel cache. You'll get lower res clover, but that's seemingly the only "negative" aspect.

 

[P1LGRIM]

You'll get lower res clover, but that's seemingly the only "negative" aspect.

For that you could try CsmVideoDxe64 from the Clover installer but note :

64bit video driver for Clover GUI allowing to choose more resolutions. It is based on CSM module in UEFI BIOS and requires CSM to be enabled.

Note: On some hardware, this may cause Clover to fail to start. It may also be a contributing factor of a kernel panic when waking from sleep.

Use with precaution.