[Bug 109215] intermittent display on kaby lake/i915 from kernel 4.19 onwards

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109215

--- Comment #2 from masterpatricko at gmail.com ---
(In reply to masterpatricko from comment #1)
> I now understand the UEFI image is intended, and not related to the main
> issue (old behaviour can be restored with fbcon=nodefer).
> 
> Main issue (black screen/flickering) still exists on 5.0.0-rc2 if no extra
> boot options are provided.
> 
> Adding i915.fastboot=1 fixes the problem. Not clear how to isolate the issue
> further.

To be clear "fbon=nodefer" alone does *not* fix the problem; i915.fastboot=1 is
required (works with or without fbcon=nodefer).

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