<html> <head> <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1"> </head> <body bgcolor="#FFFFFF" text="#000000"> After upgrading to linux Kernel-3.14, the screen on my Dell Latitude D630 was nearly unreadably dim. When I Boot the 3.13 kernel, my screen is bright. I opened a Bug here: <a class="moz-txt-link-freetext" href="https://bugzilla.redhat.com/show_bug.cgi?id=1094066">https://bugzilla.redhat.com/show_bug.cgi?id=1094066</a> and others have chimed in that they have the same problem. I bisected the kernel, and found the following commit is responsible for this problem: <pre class="bz_comment_text bz_wrap_comment_text" id="comment_text_20">b35684b8fa94e04f55fd38bf672b737741d2f9e2 is the first bad commit commit b35684b8fa94e04f55fd38bf672b737741d2f9e2 Author: Jani Nikula <<a href="mailto:jani.nikula@intel.com">jani.nikula@intel.com</a>> Date: Thu Nov 14 12:13:41 2013 +0200 drm/i915: do full backlight setup at enable time We should now have all the information we need to do a full initialization of the backlight registers. v2: Keep QUIRK_NO_PCH_PWM_ENABLE for now (Imre). Signed-off-by: Jani Nikula <<a href="mailto:jani.nikula@intel.com">jani.nikula@intel.com</a>> Reviewed-by: Imre Deak <<a href="mailto:imre.deak@intel.com">imre.deak@intel.com</a>> Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>> :040000 040000 0aae5515ca62ff1bfd2e1c2769e30c58b016ffeb 01c2f8cd145f8cf29730908d52e7e89b787a059e M drivers</pre> I can find my way around the kernel, but haven't hit this area before. Any help is appreciated. Marc Milgram </body> </html>