"Disabling C6 makes my 2400G usable. Almost no lockups. Please see the kernel bug report.
Ubuntu 18.04 is worthless, kernel 4.15 and 4.16 are very unstable (even with C6 disabled) and lots of display corruption. Manjaro 17.1 is working almost perfect, only some KDE issues from time to time."
"Today I tested my Ryzen 3 2200G again on the ASRock AB350M Pro4 and after upgrading Arch Linux to the latest linux 4.15.13 with just the kernel parameter amdgpu.dc=1, linux-firmware 20180314 and mesa 18.0 the system runs stable on Plasma-Wayland 5.12.3. OpenGL acceleration works well in Plasma-Wayland and in games."