[Bug 99261] Kernel 4.10-rc2 on APU with Kaveri + Topaz : boot hangs on switch to amdgpudrmfb

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99261

--- Comment #3 from Alex Deucher <alexdeucher at 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.

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