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[lp <1263498@xxxxxxxxxxxxxxxxxx>]

Hello, thanks for your report!

Due to your link, i have testet die "acpi_osi= " parameter again and
against my first description (i was able to adjust die brightness via fn
keys once a time #9) the brightness stand still on 100%, but the
difference to other parameters is that the notification daemon show me
the reaction.

The problem is may a clash between backlight providers ...
https://bugs.freedesktop.org/show_bug.cgi?id=81762 (Comment 6).

Here i found more information about two patches
https://bugzilla.kernel.org/show_bug.cgi?id=70241 (Comment 94,92).


But it seems there is no proper solution for me so far ... :(


Regards,

patrice

** Bug watch added: freedesktop.org Bugzilla #81762
   https://bugs.freedesktop.org/show_bug.cgi?id=81762

** Bug watch added: Linux Kernel Bug Tracker #70241
   http://bugzilla.kernel.org/show_bug.cgi?id=70241

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to nvidia-graphics-drivers-319 in Ubuntu.
https://bugs.launchpad.net/bugs/1263498

Title:
  Asus G75VX, can not modify brightness

Status in nvidia-graphics-drivers-319 package in Ubuntu:
  Confirmed
Status in nvidia-graphics-drivers-331 package in Ubuntu:
  Confirmed

Bug description:
  1. Ubuntu 13.10
  2. N: Unable to locate package nvidia-graphics-drivers-319
  3. I expected that when I changed the brightness level for my laptop monitor that the brightness would also change.
  4. Instead, the brightness always stays at 100%

  I have tried every configuration of grub that I have seen online or
  been asked to try on freenode.net #ubuntu by 3 different people.
  Nothing seems to fix this problem. The file for the brightness is
  always updated but it is like the driver never tells the hardware to
  change the brightness.

  I have tried Tried :
  acpi_backlight=vendor
  pcie_aspm=force
  acpi_osi='!Windows 2012'

  Option "RegistryDwords" "EnableBrightnessControl=1"

  echo 50 > /sys/class/backlight/acpi_video0/brightness
  echo 50 > /sys/class/backlight/acpi_video1/brightness
  echo 50 > /sys/class/backlight/asus/brightness

  nothing seems to work (the files are of course updated but the monitor
  rests at 100% brightness)

  I have also tried the XOrg-server and nvidia-304 drivers. They all
  have the same result, nothing.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: nvidia-319 319.32-0ubuntu7
  ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
  Uname: Linux 3.11.0-14-generic x86_64
  NonfreeKernelModules: wl nvidia
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: amd64
  Date: Sun Dec 22 16:16:35 2013
  InstallationDate: Installed on 2013-10-27 (55 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MarkForUpload: True
  SourcePackage: nvidia-graphics-drivers-319
  UpgradeStatus: No upgrade log present (probably fresh install)
  modified.conffile..etc.modprobe.d.nvidia.319.hybrid.conf: [deleted]

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