Comment 51 for bug 1747463

Do you have the amdgpu firmware installed?

When you create bugs against amdgpu driver, use the latest kernel and mesa code:
https://cgit.freedesktop.org/~agd5f/linux/?h=drm-next-4.11-wip
https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers

Problems might be fixed in the latest code.

Latest polaris firmware:
https://people.freedesktop.org/~agd5f/radeon_ucode/polaris/

How to create a custom kernel, see:
https://bugzilla.kernel.org/show_bug.cgi?id=193651