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Thread: Brightness not working in Sony Vaio VGN SR129EB, with Radeon HD 3470 graphic card

  1. #1
    Join Date
    Aug 2008
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    18

    Brightness not working in Sony Vaio VGN SR129EB, with Radeon HD 3470 graphic card

    Hi,

    After a couple of days having left the dual booting and installing just ubuntu, I started to notice that my screen was pretty "gray" or dark, and what used to be white (as this background color) looks much darker than before. I remember that in windows the colors were very intense, but now I can't check.

    I have a Sony Vaio VGN SR 129 E/B, and a Radeon HD 3470 graphic card.

    I have tried:
    a) Use fn keys, but they are not working (just volume keys work)
    b) Run Ubuntu through Live CD. The brightness is the same, and the brightness fn keys don't work either.
    c) Check BIOS. I have just 4 menus (main, security, boot and exit) and no option to control brightness or screen or anything close to that.
    d) I installed xbacklight. When I tried it, I got: "No outputs have backlight property"
    e) Then I tried xrandr:
    Code:
    xrandr --output LVDS --set BACKLIGHT_CONTROL native
    But I got:
    Code:
    a3qp@a3qp-laptop:~$ xrandr --output LVDS --set BACKLIGHT_CONTROL native
    X Error of failed request:  173
      Major opcode of failed request:  159 (RANDR)
      Minor opcode of failed request:  15 ()
      Serial number of failed request:  14
      Current serial number in output stream:  14
    f) Finally, I tried to set acpi=off: In terminal I wrote:

    sudo gedit /boot/grub/menu.lst

    Then I add the "acpi=off" option to the end of the "kernel" line as below:

    Code:
    title		Ubuntu 8.04.1, kernel 2.6.24-19-generic
    root		(hd0,1)
    kernel		/boot/vmlinuz-2.6.24-19-generic root=UUID=b5725877-5158-4c5f-b858-e0f6eededc1e ro quiet splash acpi=off
    initrd		/boot/initrd.img-2.6.24-19-generic
    quiet
    But I got no change. And the fn brightness keys still don't work.

    Any suggestion would be appreciated.

    Thanks

  2. #2
    Join Date
    Aug 2007
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    Paris
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    5,538
    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: Brightness not working in Sony Vaio VGN SR129EB, with Radeon HD 3470 graphic card

    If you have special keys or buttons on your computer to turn on and off the wireless card, volume, etc., do they work? Or do you use the function keys to do all of that?

  3. #3
    Join Date
    Aug 2008
    Beans
    18

    Re: Brightness not working in Sony Vaio VGN SR129EB, with Radeon HD 3470 graphic card

    Hi Pytheas22,

    The wireless connection is controlled by a built-in switch, which is in the front od the PC. The volume is controlled with fn+F2, fn+F3 and fn+F4 (which are mute, increase volume and decrease volume respectively).

    The other fn keys are:

    fn+F5 and fn+F6 which are increase and decrease of brightness
    fn+F7 which is to let monitor signal to go to a projector.
    fn+F9 and fn+F10 which is zoom in and out.
    and some other less frequently used.

    It only works the fn volume keys. All the rest is not working at all.

  4. #4
    Join Date
    Aug 2007
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    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: Brightness not working in Sony Vaio VGN SR129EB, with Radeon HD 3470 graphic card

    I googled around and it seems that there are a lot of issues with the function keys, on Sony laptops in particular. I found two things that you might want to try. First, there's a script here that says it will automatically fix the problem. To run it, type:
    Code:
    wget http://www.intentionallyobsolete.com/projects/feisty-fsfn.sh
    sudo feisty-fsfn.sh
    It's for Feisty, but maybe it will work on Hardy too.

    If that doesn't help, take a look at this page; those instructions may do the trick. Let us know if you have success.

  5. #5
    Join Date
    Aug 2008
    Beans
    18

    Re: Brightness not working in Sony Vaio VGN SR129EB, with Radeon HD 3470 graphic card

    Thanks for the solutions. Unfortunately, I have no good news.

    I did the first method:

    Code:
    wget http://www.intentionallyobsolete.com/projects/feisty-fsfn.sh
    sudo feisty-fsfn.sh
    but i got a command not found error, although I was in the same directory:

    Code:
    a3qp@a3qp-laptop:~$ sudo feisty-fsfn.sh
    sudo: feisty-fsfn.sh: command not found
    a3qp@a3qp-laptop:~$ ls
    Desktop  disco1  disco2  feisty-fsfn.sh  PDF

    Then I tried the second potential solution, which is here
    Let me rewrite it:
    Code:
    wget http://users.skynet.be/thomasvst/linux-on-laptop/download/sony_acpi.tar.gz
    tar xzvf sony_acpi.tar.gz
    cd sony_acpi
    make
    sudo cp sony_acpi.ko /lib/modules/`uname -r`/kernel/drivers/acpi/
    sudo gedit /etc/modules
    Add the line sony_acpi at the end of the file
    Then
    Code:
    wget http://users.skynet.be/thomasvst/linux-on-laptop/download/sonyfn.c
    gcc sonyfn.c -o sonyfn
    sudo mv sonyfn /usr/sbin
    sudo gedit /etc/init.d/bootmisc.sh
    Add the line

    sonyfn &

    after the line : [ -f /etc/default/rcS ] && . /etc/default/rcS (at approximatively line 10).

    Then save and reboot.

    However, everything worked fine, until the last line, where I didn't find the line: [ -f /etc/default/rcS ] && . /etc/default/rcS

    I have:

    ### END INIT INFO

    PATH=/usr/sbin:/usr/bin:/sbin:/bin
    [ "$DELAYLOGIN" ] || DELAYLOGIN=yes
    sonyfn &
    . /lib/init/vars.sh

    do_start () {
    #
    ...

    So I put the line sonyfn & right after the line:
    [ "$DELAYLOGIN" ] || DELAYLOGIN=yes

    Should I place it in other part?

    Thanks

  6. #6
    Join Date
    Aug 2007
    Location
    Paris
    Beans
    5,538
    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: Brightness not working in Sony Vaio VGN SR129EB, with Radeon HD 3470 graphic card

    Sorry, try running the first script again...I forgot that the file probably wouldn't be executable. Run this and it should work:
    Code:
    wget http://www.intentionallyobsolete.com/projects/feisty-fsfn.sh
    sudo chmod +x feisty-fsfn.sh
    sudo sh feisty-fsfn.sh

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