[Bug 92858] AMD Radeon GPU Acceleration Disabled Under Kernels 4.2.x and later versions

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92858

--- Comment #10 from Christian König <deathsimple at vodafone.de> ---
That looks promising. Here are a few hints how to proceed.

> git bisect good c11d716218910c3aa2bac1bb641e6086ad649555
First of all you don't need to always specify the commit, git knows that by
itself. E.g. "git bisect good" without the commit hash should be sufficient.

(In reply to Darren D. from comment #9)
> git bisect bad c5fd936e992dd2829167d2adc63e151675ca6898
> 
> The kernel I build after I tell git bisect the above revision is bad freezes
> on "loading initial ramdisk."

That's unfortunate but happens sometimes. Since
c5fd936e992dd2829167d2adc63e151675ca6898 is bad the problem must be somewhere
between v4.1 and c5fd936e992dd2829167d2adc63e151675ca6898.

Since it is a radeon driver problem I suggest you limit bisect to only test the
changes made to radeon.

Please try the command "git bisect start
c5fd936e992dd2829167d2adc63e151675ca6898 v4.1 drivers/gpu/drm/radeon/".

If that still doesn't work try "git bisect skip" if you have a commit that
won't work at all.

If that also doesn't work just go on with "git bisect good/bad" and try to
figure out when the issue with the ramdisk started.

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