All of lore.kernel.org
 help / color / mirror / Atom feed
From: Marc Milgram <mmilgram@redhat.com>
To: intel-gfx@lists.freedesktop.org
Subject: Screen extremely dim on Dell Latitude D630 after upgrading to Linux kernel-3.14
Date: Thu, 22 May 2014 16:17:49 -0400	[thread overview]
Message-ID: <537E5B6D.1030408@redhat.com> (raw)


[-- Attachment #1.1: Type: text/plain, Size: 1327 bytes --]

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: https://bugzilla.redhat.com/show_bug.cgi?id=1094066 
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:

b35684b8fa94e04f55fd38bf672b737741d2f9e2 is the first bad commit
commit b35684b8fa94e04f55fd38bf672b737741d2f9e2
Author: Jani Nikula <jani.nikula@intel.com  <mailto:jani.nikula@intel.com>>
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 <jani.nikula@intel.com  <mailto:jani.nikula@intel.com>>
     Reviewed-by: Imre Deak <imre.deak@intel.com  <mailto:imre.deak@intel.com>>
     Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch  <mailto:daniel.vetter@ffwll.ch>>

:040000 040000 0aae5515ca62ff1bfd2e1c2769e30c58b016ffeb 01c2f8cd145f8cf29730908d52e7e89b787a059e M	drivers

I can find my way around the kernel, but haven't hit this area before.

Any help is appreciated.

Marc Milgram


[-- Attachment #1.2: Type: text/html, Size: 1863 bytes --]

[-- Attachment #2: Type: text/plain, Size: 159 bytes --]

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

             reply	other threads:[~2014-05-22 20:17 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-22 20:17 Marc Milgram [this message]
2014-05-26  9:57 ` Screen extremely dim on Dell Latitude D630 after upgrading to Linux kernel-3.14 Jani Nikula

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=537E5B6D.1030408@redhat.com \
    --to=mmilgram@redhat.com \
    --cc=intel-gfx@lists.freedesktop.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.