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Bug#779529: xserver-xorg-video-intel: Built-in display completely black if external monitor is plugged in



On Sun, Mar  1, 2015 at 22:03:38 +0000, Luca Boccassi wrote:

> Dear Maintainer(s),
> 
> I am attaching a Git patch that backports the fixes needed in order to
> solve the backlight problem. I have tested this on a Dell Latitude
> E5540 (Intel Haswell i7-4600U with GPU HD Graphics 4400) running
> Debian Jessie. I hope this can be useful.
> 
This is way too big a change to ship in jessie.  Seems like the
backlight helper is mostly useful when X doesn't run as root, which is
irrelevant here, so we could do without the code movement.  Do you know
what exact change does fix your backlight issue?

Cheers,
Julien

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