Comment # 4 on bug 92974 from charlie

With these options there is no ~2 minute kernel boot or startx delay bug:

CONFIG_DRM_AMD_POWERPLAY=y in kernel ".config"

"Device Drivers/Graphics support/Direct Rendering Manager/Enable legacy fbdev
support for your modesetting driver" set to, "y" in kernel "make menuconfig".

"amdgpu.powerplay=0" on lilo append line.