[Bug 73519] Unable to start X with radeon 6480g

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73519

--- Comment #6 from Alex Deucher <agd5f at yahoo.com> ---
(In reply to comment #5)
> Booting with radeon.runpm=0 helps, but what radeon.runpm do?

It disables dynamic powering up/down of the dGPU in your system.  Make sure
your kernel has this patch:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f244d8b623dae7a7bc695b0336f67729b95a9736

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