[Bug 107793] Black screen on boot for Fedora 28 with 4.17 kernel (i.e. with amdgpu.dc defaulted)

https://bugs.freedesktop.org/show_bug.cgi?id=107793

--- Comment #8 from Simon Geard simon.geard@gmail.com --- (In reply to Nicholas Kazlauskas from comment #7)

Can you try booting with amdgpu.dc=0 in your kernel boot parameters?

As noted in the original bug report, "passing "amdgpu.dc=0" on the kernel command line resolves the problem." The "successful boot" logs I've provided were all captured under that setting, since the system is unusable without it.

I *suspect* the system is booting fine apart from the graphics, because when Fedora reboots to apply updates, it does so successfully before powering off as expected – I just can't see anything on the screen.