[Bug 249357] graphics/drm-fbsd12.0-kmod: Doesn't work on AMD E-300 (Radeon HD 6310/PALM) laptop

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=249357

--- Comment #14 from Joshua Kinard <kumba at gentoo.org> ---
Some added observations.  I worked out by renaming the four firmware files this
APU needs that the "icing-up" effect does not happen if radeon_SUMO_rlc_bin.ko
cannot be loaded.  I am also noticing that when the effect does happen, it
happens before the I2C bus is able to probe for the display.  So it hints to me
that the problem(s) are in either the SUMO_rlc code or it's something to do
with how the I2C logic is or isn't working right to probe the display.  I'm
leaning more towards I2C.  The icing-up effect doesn't seem emblematic of code
doing something funny, but more of hardware being told to do something the
wrong way, like bad voltage being applied somewhere or such.

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