Re: X1C brightness interface

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On 04/01/2014 03:39 PM, marduk@xxxxxxxxxxxxxxx wrote:
> Bo,
>
> I've experienced this issue as well (although I didn't know the
> suspend/resume trick).  The way I've resolved it, from what I've seen on
> the 'net is to comment out the following in
> drivers/gpu/drm/i915/intel_dp.c at line ~3817:
>
>                  // bpp = dev_priv->vbt.edp_bpp;
>
> I'm not sure what that does, but works for me.  Somone else might have a
> nicer solution.
Thanks for this hint, this spread some light on the problem, there seems 
to be a lots of fixes for this, i found this too :

http://lists.freedesktop.org/archives/dri-devel/2013-October/047941.html

Maybe Lenovo may fix this in the BIOS (reporting ?) or intel may fix the 
driver, not very easy to know :-)

But for now I can live with my solution, as I use suspend/resume on a 
daily basis (i hate rebooting my workspace) :-)

/BL

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