https://bugs.freedesktop.org/show_bug.cgi?id=97605
--- Comment #6 from James Payne jamoflaw@gmail.com --- Hi Michel/Timo
I have previously managed to get the system booting (albeit with the same screen issues) but for some reason the newer kernels (I've tried 4.7RC6 and DRM-Next as of today 18th Sept) and both are failing to boot entirely, don't even get to bring up the wired network which I have managed to open a SSH session between two laptops to at least interrogate the non functioning laptop now. Though messing with the kernels seems to have caused some huge corruption on the filesystem through all the system buttoning I'm having to do :) Another reinstall required I think.
Is there a specific kernel (maybe not bleeding edge) that I can try? - fyi I also have a Broadcom wireless which is attempting to compile a kernel module during each deb install, I noticed on those two kernels the module failed to compile correctly so might be where the issue is coming from.
For reference, I originally posted this on launchpad which has a few more details collected from apport: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-amdgpu/+bug/159...