today I decided to upgrade my 16.04 LTS to 17.10. First I had to go to 17.04, where my old AMDGPU drivers no longer worked. On my dual-monitor I only got mirrored screen of the smaller one. Well, the rest more or less seemed to work, so I went on to 17.10. Still got the small screen, but de-installing AMDGPU brought back full HD.
Next steps:
delete old vulkanSDK
install new vulkanSDK
install new AMDGPU
reboot
Computer is starting, while awaiting log-in screen, I only get black screen…sometimes it gets lighter black, nothing noticeable.
Ok, after wondering about re-installing I found some information online.
When starting the system (Mate 17.10, no dual boot) I wasn’t able to see GRUB menu. But I read it could be brought on screen by holding [SHIFT] key at boot. Well, long story short. It doesn’t work. Nobody updated the readme about that you need to hold RIGHT [SHIFT] key or you may try [PAUSE] (didn’t work for me) and/or [ESC] while booting.
The combination of RIGHT [SHIFT] + [ESC] seemed to work for me…probably it was only the [ESC] because right shift didn’t work on former try.
Ok, GRUB menu. Then I choose recovery mode, but wasn’t able to find ‘failsafeX’ or something, to start without the ususal graphic driver. But hey, there was a point ‘console start’ which worked with root rights. Unfortunately no usual commands worked, but after I managed to start a second computer to find the AMD AMDGPU site, i tried the de-install command ’ amdgpu-pro-uninstall ’ which finally worked. Still a bit confused, that I never was asked for sudo password in the whole process…