[Bug 61891] Cannot switch off Radeon 6400M with vgaswitcheroo

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=61891

--- Comment #13 from madcatx at atlas.cz ---
"acpiphp.disable=1" in the kernel bootline fixes the problem for me. The Radeon
is reported as off in vgaswitcheroo and the laptop draws less power. The DIS
even powers up and down correctly with DRI_PRIME.

Acpidump provided

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