maintainer-feedback requested: [Bug 247946] graphics/drm-fbsd12.0-kmod radeon VGA EDID problem

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Bugzilla Automation <bugzilla at FreeBSD.org> has asked freebsd-x11 (Nobody)
<x11 at FreeBSD.org> for maintainer-feedback:
Bug 247946: graphics/drm-fbsd12.0-kmod radeon VGA EDID problem
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=247946



--- Description ---
After I had to upgrade from FreeBSD-11 to FreeBSD-12 (since new Qt5 now do not
work with base OpenSSL, and some other problems), I migrated from
graphics/drm-fbsd11.2-kmod to graphics/drm-fbsd12.0-kmod obviously.

May be it is a wrong port I am complaining, but there was no such behaviour
previously (on -11 branch).

When it've loaded amdkms.ko from rc.conf line, I get the error periodicaly on
console (no X-server loaded yet):

[drm:radeon_vga_detect] VGA-1: probed monitor but no|invalid EDID

and my poor old monitor blinks which is not good for it or my eyes.
I suppose it is something to do with my upgrade and drm-fbsd12.0-kmod port,
since it was not with 11.2 version.