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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [i915 intel_backlight] can't regulate brightness at GDM login prompt if HDMI monitor connected"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87286#c13">Comment # 13</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [i915 intel_backlight] can't regulate brightness at GDM login prompt if HDMI monitor connected"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87286">bug 87286</a>
from <span class="vcard"><a class="email" href="mailto:luca.boccassi@gmail.com" title="Luca Boccassi <luca.boccassi@gmail.com>"> <span class="fn">Luca Boccassi</span></a>
</span></b>
<pre>Hello,
I have a Dell Latitude E5540, running an Intel Haswell i7-4600U with GPU HD
Graphics 4400, and I have the same problem. But I noticed that upgrading the
Intel driver to a version that ships a new backlight helper binary fixes the
problem.
In my case, I am running Debian Jessie. The driver is part of the package
xserver-xorg-video-intel and the version that ships the new backlight helper,
according to the changelog, is:
xserver-xorg-video-intel (2:2.99.911+git20140529-1~exp1) experimental;
urgency=low
* New upstream prerelease. (closes: #748753)
* Install new backlight helper.
Kind regards,
Luca Boccassi</pre>
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