Hello to everyone. I've a PC with AMD A-10 (integrated graphics card is disabled in BIOS) and AMD R9 290 GPU with fresh KDE Neon 5.8.7. And right after installation everything (including open-source driver) works fine.

I have installed AMDGPU-PRO Driver (17.30-465504 build number) using the following official tutorial

http://support.amd.com/en-us/kb-article ... stall.aspx

I've avoided 'Unsupported OS' issue using the following instructions

viewtopic.php?f=309&t=136280&p=364535&hilit=amd+drivers#p364535

But now, when I selecting in grub menu 'neon GNU Linux' I just see KDE Neon logo for a couple of seconds (and screen resolution is definitely low) and after that booting pauses on a black screen.

If after that I am doing hard reset, going in grub menu to 'advanced options' and there selecting the first one '4.10.0-generic' (and I assume that this is exactly the same as previously, or am I wrong here ?) then loading starts, but for a couple of seconds I see the following:

[11.162043] amdgpu 0000:01:00.0: Invalid PCI ROM header signature: expecting 0x

After that OS starts normally, but how can I be sure that everything is working fine? And anyway I don't like such behavior.

Any help please. Should I post some additional information ?