[Bug 77321] [regression] vga_switcheroo breaks between 3.12.0 and 3.13-rc1 on MacbookPro 6,2 (Core i5 + Nvidia 330M)

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=77321

--- Comment #3 from Imre Deak <imre.deak at gmail.com> ---
(In reply to Jani Nikula from comment #1)
> Have you tried latest kernels?
> 
> CC Imre, did we fix something related to i2c cleanup lately? Does the dmesg
> look familiar to you?

Yes, by a quick look it does look like the WARN fixed by

commit 4932e2c3c716067f3580e1a9687bed9d751549e3
Author: Imre Deak <imre.deak at intel.com>
Date:   Tue Feb 11 17:12:48 2014 +0200

    drm/i915: add unregister callback to connector

and

commit 80f65de3c9b8101c1613fa82df500ba6a099a11c
author: Imre Deak <imre.deak at intel.com>
Date:   Tue Feb 11 17:12:49 2014 +0200

    drm/i915: dp: fix order of dp aux i2c device cleanup

The fix first appeared only in v3.15-rc1 and not sent to -stable (and so not
part of 3.14.4).

They apply on 3.14.4 so you could try if they fix the problem.

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