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Thread: Issues with FN keys - Ubuntu 10.04

  1. #1
    Join Date
    Apr 2010
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    33

    Issues with FN keys - Ubuntu 10.04

    Hello!

    I just updated to 10.04 and I'm experiencing issues with my function keys supposed to control screen brightness on my Asus UL30a It worked fine in 9.10...

    When I do a acpi_listen command to listen to my function keys (e.g. to increase brightness) it gives me back three different results not just one. I guess it thinks I just pressed three keys at once. The other function keys seem to work fine. I don't use Ubuntu's power manager but a custom xbacklight script. Could that be the cause of my problem? Sorry if this question is stupid but I'm quite new to Ubuntu...


    Any suggestions? Thank you!

  2. #2
    Join Date
    Sep 2009
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    11

    Re: Issues with FN keys - Ubuntu 10.04

    I've got the same issue. I've seen the bug reported, but I haven't found a solution.

    Essentially holding doing the FN key and increasing or decreasing the brightness either, doesn't work or its random.

    Anyone have any ideas?

  3. #3
    Join Date
    Sep 2009
    Beans
    11

    [SOLVED] Issues with FN keys - Ubuntu 10.04

    I found a solution.

    Its a matter of adding the following snipet to grub

    Solution

    Open up Terminal and enter the following
    Code:
    sudo gedit /etc/default/grub
    Look for the line that says GRUB_CMDLINE_LINUX and add this
    Code:
    GRUB_CMDLINE_LINUX="acpi_backlight=vendor"
    Save it and then update Grub
    Code:
    sudo update-grub
    Reboot

  4. #4
    Join Date
    Apr 2010
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    33

    Re: Issues with FN keys - Ubuntu 10.04

    You just made my day! Thank you a lot!

    Even though I don't understand what your solution did...

  5. #5
    Join Date
    Mar 2010
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    19

    Re: [SOLVED] Issues with FN keys - Ubuntu 10.04

    Quote Originally Posted by agarciamog View Post
    I found a solution.

    Its a matter of adding the following snipet to grub

    Solution

    Open up Terminal and enter the following
    Code:
    sudo gedit /etc/default/grub
    Look for the line that says GRUB_CMDLINE_LINUX and add this
    Code:
    GRUB_CMDLINE_LINUX="acpi_backlight=vendor"
    Save it and then update Grub
    Code:
    sudo update-grub
    Reboot
    Tried that, but it didn't worked for me
    I am trying to resolve the almost same issue on the girlfriend's notebook Asus X56TR with M51TR motherboard /the same model line/. Every other function key is working well, but when I try to set different brightness it locks up everything, one of the cores stays at constant 100% usage and the only thing I can do is the known disaster reboot (alt+prtsc/sysrq + R, S, E, I, N, U, B)
    The version is Lucid Lynx Final 64bit release, the type of installation was upgrade from Karmic. In Karmic the function keys worked well including brightness without the "disable touch pad" key, now touch pad key works but nor brightness, nor the ambient light sensor enable/disable (Fn + A).

    Edit: For me the issue isn't ending only with brightness, if I try to put the computer on battery /unplug the AC/ behaves the same - one of the cores at 100% -> disaster reboot... If someone have any idea I'll be very thankful, cause I'm out of
    Last edited by ttanev; May 2nd, 2010 at 08:17 AM.

  6. #6
    Join Date
    Apr 2010
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    33

    Re: Issues with FN keys - Ubuntu 10.04

    Strange... It did work for me...

    Someone suggested to update to a newer kernel (From the launchpad team):

    Quote:

    "After upgrading to some more recent kernel (.33, .34rc6 atm) all the
    issues with non-working brightness controls / Fn keys were gone as well.
    You can get recent kernel from the Mainline ppa:

    http://kernel.ubuntu.com/~kernel-ppa/mainline/


    As a sidenote, i think my battery lasts way longer with .34 - powertop
    shows power draw below 6W sometimes. I never had such figures with
    9.10 / kernel .31."

    Unquote

    You may want to try this...

  7. #7
    Join Date
    Apr 2010
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    33

    Re: Issues with FN keys - Ubuntu 10.04

    I removed the [solved] marker because the posted solution doesn't work for everyone.

    Anyone who can confirm that a kernel update solves this issue?

    Thank you for contributing!

  8. #8
    Join Date
    Aug 2005
    Location
    Austria
    Beans
    57
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: Issues with FN keys - Ubuntu 10.04

    agarciamog's solution works for me (UL30A-QX065V)

    thanks a lot!

  9. #9
    Join Date
    May 2010
    Beans
    3

    Re: Issues with FN keys - Ubuntu 10.04

    Guys! It should work for everyone! First it didn't work for me, but I've noticed that the problem is with quotation marks in added line:

    GRUB_CMDLINE_LINUX=”acpi_backlight=vendor”

    Replace quotation marks from this line (in /etc/default/grub) with quotation marks that you type yourself. It has worked for me!

  10. #10
    Join Date
    Mar 2010
    Beans
    19

    Re: Issues with FN keys - Ubuntu 10.04

    Quote Originally Posted by ed anger View Post
    Guys! It should work for everyone! First it didn't work for me, but I've noticed that the problem is with quotation marks in added line:

    GRUB_CMDLINE_LINUX=”acpi_backlight=vendor”

    Replace quotation marks from this line (in /etc/default/grub) with quotation marks that you type yourself. It has worked for me!
    Tried this as soon as I red it, but didn't worked for me /Asus M51TR/. I even misread it the first time, so tried also without quotes at all

    Quote Originally Posted by AXBX7C View Post
    Strange... It did work for me...

    Someone suggested to update to a newer kernel (From the launchpad team):...

    ...

    You may want to try this...
    That worked like charm, thanks
    The new issue is that fglrx become broken with the rc6 kernel and even cannot install binary driver at all from anywhere. Tried to set radeonhd, but now I'm at ubuntu loading screen with no movement ahead. Probably will do a clean install and restore the settings... It was not too much to set after the installation anyway. And because I forgot to delete xorg.conf had some trouble, but know everything is okay The RadeonHD is really matured a lot since last time I tried it the last time and the battery time is okay too with .34rc6. Thanks again! Solved for me too.

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