Comment # 2 on bug 101387 from Michel Dänzer

Looks like amdgpu_atombios_crtc_powergate_init scribbles over the stack.

(In reply to Carlo Caione from comment #1)
> If I recompile the kernel forcing CONFIG_CC_STACKPROTECTOR_NONE == none I don't
> have the panic anymore (of course) but I can still see the corruption at boot
> (and weird artifacts on plymouth).

What kind of artifacts in plymouth? Does e.g. X work correctly?