[Intel-gfx] [bisect] regression in suspend with i915 on 82852/855GM

[Philipp Gesang]

···<date: 2015-06-26, Friday>···<from: Jani Nikula>···

> On Thu, 25 Jun 2015, Philipp Gesang <phg at phi-gamma.net> wrote:
> > Nice tool. With a vanilla kernel I get a value of 0x80000000
> > before suspend and 0x00000000 after resume. With the patched
> > kernel it’s 0x80000000 before and after.
> >
> > On the vanilla kernel, issuing ``intel_reg write 0x61260 0x80000000`` 
> > after resume turns the backlight back on.
> 
> Please try this patch:
> 
> From 018c3dab349b9ba82364ea6e7257d1bbad3df2ae Mon Sep 17 00:00:00 2001
> From: Jani Nikula <jani.nikula at intel.com>
> Date: Thu, 25 Jun 2015 23:55:06 +0300
> Subject: [PATCH] drm/i915: fix backlight on gen2
> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo
> Cc: Jani Nikula <jani.nikula at intel.com>

Tested based on kernel aefbef10e3…. Works great, thanks!

Best,
Philipp


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