The issue: switching over from Radeon kernel driver (radeon.ko) over to Amdgpu (amdgpu.ko).
I was able to get up to the point where it seems to load the amdgpu as seen in the boot screen, but it it stops going any further from that point on.
The only change made to the system was blacklisting the radeon driver:
/etc/modprobe.d/blacklist-radeon.conf: blacklist radeon
I've even checked driver support for the device by doing:
$ lspci -k|egrep 'VGA|in use'
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Kabini [Radeon HD 8400 / R3 Series]
Kernel driver in use: radeon
Kernel modules: radeon, amdgpu
$ lspci -n |grep 00:01.0
00:01.0 0300: 1002:9830
00:01.0 – Device
1002 – Constructor code for AMD/Radeon Corporation
9830 – The model ID.
Then to search the driver using the model id:
$ cat /lib/modules/4.13.0-41-generic/modules.alias|grep 9830
alias pci:v00001002d00009830svsdbcsci* radeon
alias pci:v00001002d00009830svsdbcsci* amdgpu
The only other method I've tried was installing amdgpu-pro 18.10 drivers from AMD https://support.amd.com/en-us/kb-articles/Pages/Radeon-Software-for-Linux-Release-Notes.aspx (Which automatically blacklists radeon for you and sets up a udev rule for all user access to /dev/kfd for the video group.
Which amongst other things installs a dkms amdgpu module. And I've also made these changes to kernel boot time:
GRUB_CMDLINE_LINUX_DEFAULT="amdgpu.cik_support=1 radeon.cik_support=0 amdgpu.vm_fragment_size=9"
Yes, linux kernel 4.13.0-41-generic has
And yet this still doesn't work. So I'm not sure what else I'm missing or not doing. Hopefully someone can get this resolved.
The whole reason I have even gotten into this is because on configuring X server
X -configure and trying to run a OpenCL application I get the message:
amdgpu_device_initialize: DRM version is 2.50.0 but this driver is only compatible with 3.x.x