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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #8 from Simon Geard <simon.geard at 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.

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