Sunday, October 9, 2011

How to Fix Adjust Screen Backlight of HP dv6t Quad Core Edition with ATI/AMD Radeon HD in Ubuntu/Linux Mint 11.04

Hp-dv6t-quad-core-edition-ati-
If you're looking to fix LCD screen backlight adjustment controls in HP dv6t Quad Core Edition notebook with Intel Core i7 2630QM and powered by ATI/AMD Radeon HD 6770M Switchable/Hybrid Graphics Card, here's the tutorial for you.


For a few problems, I have posted solutions on how to run Ubuntu / Linux Mint 11.04 on HP dv6t Quad Core Edition with ATI/AMD Radeon HD 6770M Switchable Graphics Card.
To fix adjusting monitor/screen backlight functionality with Fn/action keys, follow these steps:
1. Add the Kamal PPA repository that contains patched Linux kernel and gnome-power-manager :
sudo add-apt-repository ppa:kamalmostafa/linux-kamal-mjgbacklight
2. Upgrade your packages (especially linux-* and gnome-power-manager packages)
sudo apt-get update
sudo apt-get upgrade
3. Edit the GRUB2 boot parameters in /etc/default/grub to add acpi_vendor=backlight , as follows:
GRUB_CMDLINE_LINUX_DEFAULT="splash acpi_backlight=vendor"
GRUB_CMDLINE_LINUX="acpi_backlight=vendor"
4. Update GRUB configuration:
sudo update-grub
Reboot Ubuntu / Linux and you should have LCD monitor screen backlight adjustment fully working!
I am now very happy with this HP dv6t Quad notebook! Very powerful, good battery life, cool-looking, and runs Linux quite flawlessly :-)
Find tips to optimize your Ubuntu 11.04 in Ubuntu Unleashed 2011 Edition: Covering 10.10 and 11.04 (6th Edition) !
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9 comments:

  1. AnonymousOctober 25, 2011 at 10:32 AM

    Thx to Kamal for this patched kernel and thx to you about this fast/simple howto. It's works like a charm. HP 630 here.
    Regards

    ReplyDelete
  2. PieterNovember 1, 2011 at 11:57 PM

    This worked great for me on 11.04 but the ppa is not for 11.10 nor kernel 3. Any luck with oneiric?

    ReplyDelete
    Replies
    1. GurshaantFebruary 7, 2012 at 11:19 PM

      This works flawlessly on ubuntu 11.10 too!!!Tested it myself :)

      Delete
  3. MarcoosFebruary 27, 2012 at 3:07 PM

    Worked like a charm

    Debian Wheezy Kernel 3.2 Xen

    I only needed steps 3 and 4 then reboot

    ReplyDelete
  4. UnknownMay 23, 2012 at 12:03 AM

    Worked great on 12.04!

    ReplyDelete
  5. FelipeJuly 22, 2012 at 7:01 PM

    Mint Debian works with only steps 3 and 4 then reboot

    ReplyDelete
  6. AnonymousAugust 18, 2012 at 12:43 AM

    Thank you! Only steps 3 and 4 almost work for samsung np300a5 with ubuntu 12.04 after installing bumblebee. I say almost because now I could dim the screen but I cannot take the backlight all the way up again. Any idea?

    Much better now anyway.

    ReplyDelete
  7. AnonymousAugust 18, 2012 at 1:56 AM

    Update: I am able to increment brithness by this script:

    https://bbs.archlinux.org/viewtopic.php?pid=1148019#p1148019

    ReplyDelete
  8. AnonymousSeptember 12, 2013 at 11:30 PM

    Thank you, this fixed my display brightness issue for my HP DV7T-6000 quad edition, my brightness controls now work properly on ubuntu 13.04 thanks!!

    ReplyDelete

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