[Bug 55311] Since 3.7.1-17.1 radeon has no backlight when using vgaswitcheroo (regression)

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=55311

--- Comment #46 from Jani Nikula <jani.nikula at intel.com> ---
Created attachment 107004
  --> https://bugzilla.kernel.org/attachment.cgi?id=107004&action=edit
drm/i915: do not disable backlight on vgaswitcheroo switch off

All, please test the attached patch to see if it helps.

Alex, do you see any issues with this approach, particularly on non-Intel GPUs
that do provide a backlight interface?

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