Ubuntu
gnome-settings-daemon package

Backlight control for "dell_backlight" is missing in gsd-backlight-helper

Bug #862474 reported by Stefan Glasenhardt
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
GNOME Settings Daemon
Fix Released
Undecided
Unassigned
gnome-settings-daemon (Ubuntu)
Fix Released
Undecided
Rodrigo Moya
Oneiric
Fix Released
Undecided
Rodrigo Moya

Bug Description

Hi,

Since a quite a while backlight management on my notebook (Dell Latitude D830) is quite broken. It started when a patch to manage the backlight in the kernel intel-driver was introduced.

Here is the deal:

My notebook normally uses the kernel interface "dell_backlight". This worked perfectly until the above patch was introduced. New gsd-backlight-helper chooses "intel_backlight" as the standard interface. When using this, i can still control the backlight but because "intel_backlight" assumes 255 steps instead of the correct 7 steps of "dell_backlight", "gnome-settings-daemon" can't correctly set and get the values.

After patching the file "gsd-backlight-helper.c" (Adding "dell_backlight as an additional kernel-interface) the backlight management is back to normal. Please see the attachment for more details.

Revision history for this message
Stefan Glasenhardt (glasen) wrote :
Revision history for this message
Sebastien Bacher (seb128) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. The issue you are reporting is an upstream one and it would be nice if somebody having it could send the bug to the developers of the software by following the instructions at https://wiki.ubuntu.com/Bugs/Upstream/GNOME. If you have done so, please tell us the number of the upstream bug (or the link), so we can add a bugwatch that will inform us about its status. Thanks in advance.

Revision history for this message
Sebastien Bacher (seb128) wrote :

Thank you for the fix, backlight control from the keyboard works fine without that on a latitude e6410 there but the change seems same and if it fixes the control on other models we should get it in oneiric

Changed in gnome-settings-daemon (Ubuntu):
importance: Undecided → High
status: New → Confirmed
Changed in gnome-settings-daemon (Ubuntu Oneiric):
assignee: nobody → Rodrigo Moya (rodrigo-moya)
Rodrigo Moya (rodrigo-moya)
Changed in gnome-settings-daemon (Ubuntu):
importance: High → Undecided
status: Confirmed → In Progress
Revision history for this message
Rodrigo Moya (rodrigo-moya) wrote :

Thanks for testing Seb. I'll include this fix in the next upload

Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package gnome-settings-daemon - 3.2.0-0ubuntu4

---------------
gnome-settings-daemon (3.2.0-0ubuntu4) oneiric; urgency=low

  * debian/patches/00git_dont_sleep_on_idle_by_default.patch:
    - Don't sleep on idle by default (LP: #860485)
  * debian/patches/00git_dont_revert_pre_idle_brigthness.patch:
    - Do not revert to the pre-idle brightness if idle dimming is disabled
  * debian/patches/50_add_dell_backlight.patch:
    - Add 'dell_backlight' module to gsd-backlight-helper (LP: #862474)
 -- Rodrigo Moya <email address hidden> Thu, 29 Sep 2011 16:47:57 +0200

Changed in gnome-settings-daemon (Ubuntu Oneiric):
status: In Progress → Fix Released
Revision history for this message
Sebastien Bacher (seb128) wrote :

it has been fixed in http://git.gnome.org/browse/gnome-settings-daemon/commit/?id=a2b4e05f83568ece3ed7bb94dfa9a0a7b7ecb969

Changed in gnome-settings-daemon:
status: New → Fix Released
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