[Bug 74551] Unable to run linux with radeon.runpm=1

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=74551

--- Comment #12 from Alex Deucher <alexdeucher at gmail.com> ---
(In reply to maxis11 from comment #6)
> BTW runpm works with 3.12.7 and 3.12.8 (with 3.13 and later runpm=1 freezes
> laptop during boot)

runpm support didn't exist until 3.13. If "echo OFF >
/sys/kernel/debug/vgaswitcheroo/switch" has never worked, then your system has
never had functional support for turning on/off the dGPU.

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