Initially I reported bug 1086742 AMD graphics don't work after last Kernel
update

After last 4.12.14-lp150.7.2 update (bug 1086742 fix) system won't start at
all, it will block after GRUB.

Previously I was able to boot with Kernel 4.12.14-lp150.5.3 and have a full
visual working system.

But now even Kernel 4.12.14-lp150.5.3 won't start, I need to boot with
4.12.14-lp150.6.4 but that means my system will fallback to basic 800x600
display.

* System:
AMD A10-8700P Radeon R6, 10 Compute Cores 4C+6G @ 4x 1.8GHz

* Graphics card:
00:01.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Carrizo [1002:9874] (rev c5)
    Subsystem: Hewlett-Packard Company Device [103c:80b5]
    Kernel driver in use: amdgpu
    Kernel modules: amdgpu

* Attached:
Videos of the two mentioned not working Kernels booting

Let me know if more info is needed.