https://bugs.freedesktop.org/show_bug.cgi?id=99261
--- Comment #3 from Alex Deucher alexdeucher@gmail.com --- (In reply to SET from comment #2)
I tried to bisect for the first time, here's what I did :
git bisect start git bisect bad git bisect good v4.9 Bisecting: 5782 revisions left to test after this (roughly 13 steps) [72cca7baf4fba777b8ab770b902cf2e08941773f] Merge tag 'staging-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
... compile ... The resulting kernel loads amdgpu with a usable X.
git bisect good Bisecting: 2865 revisions left to test after this (roughly 12 steps) [775fadd09e7beac2fc61cc0517629e9fa69bdb56] Merge tag 'armsoc-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Now I don't know what else to do !
if things work: git bisect good of things don't work: git bisect bad and continue until it's done.
This patch seems to indicate locating vbios is being reworked, something is probably left out. https://lists.freedesktop.org/archives/amd-gfx/2016-December/004179.html
That code is not upstream yet. We haven't really touched the vbios fetching code in a long time, so if you are seeing a regression, it's probably somewhere else.