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  1. [ubuntu] My Brightness resets to maximum on opening several apps !!

    Whenever I switch ON my PC, I realized that the brightness resets to maximum. So I modified /etc/rc.local file with this :



    echo 40 | sudo tee /sys/class/backlight/nvidia_backlight/brightness
    ...
  2. [SOLVED] Re: Not able to control Brightness in my VAIO CW15FG laptop

    Thanks a lot Toz !! :)
    Everything works fine now...
    The hot keys and the GUI control.
    But still I don't know why my Brightness resets to maximum when I open Firefox or Thunderbird ?
    It does not...
  3. [SOLVED] Re: Not able to control Brightness in my VAIO CW15FG laptop

    Finally !!! I'm able to control the brightness through the code


    echo 20 | sudo tee /sys/class/backlight/nvidia_backlight/brightness
    However, the code


    echo 1 | sudo tee...
  4. [SOLVED] Re: Not able to control Brightness in my VAIO CW15FG laptop

    After I re-installed nvidiabl drivers again, I get


    /sys/class/backlight/nvidia_backlight
    34487
    126
    127
    /sys/class/backlight/sony
    1
    1
  5. [SOLVED] Re: Not able to control Brightness in my VAIO CW15FG laptop

    No changes on the screen...
  6. [SOLVED] Re: Not able to control Brightness in my VAIO CW15FG laptop

    No, no changes on the screen :(
  7. [SOLVED] Re: Not able to control Brightness in my VAIO CW15FG laptop

    Before installing nvidia drivers from software-properties-gtk, I had problem when ubuntu starts..
    I get a plain purple screen after which I get the login screen.
    While shut down I get the usual...
  8. [SOLVED] Re: Not able to control Brightness in my VAIO CW15FG laptop

    Modified grub like this :



    GRUB_DEFAULT=0
    GRUB_HIDDEN_TIMEOUT=0
    GRUB_HIDDEN_TIMEOUT_QUIET=true
    GRUB_TIMEOUT=10
    GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`...
  9. [SOLVED] Re: Not able to control Brightness in my VAIO CW15FG laptop

    After executing the code "echo 4 | sudo tee /sys/class/backlight/sony/brightness"

    I get the response for "for interface in /sys/class/backlight/*; do echo $interface; cat $interface/brightness;...
  10. [SOLVED] Re: Not able to control Brightness in my VAIO CW15FG laptop

    No the code

    "echo 4 | sudo tee /sys/class/backlight/sony/brightness"

    still does not make changes to my screen...

    As I've already mentioned, the values in brightness in...
  11. [SOLVED] Re: Not able to control Brightness in my VAIO CW15FG laptop

    I uninstalled nvidiabl.
    Modified the grub like this :



    GRUB_DEFAULT=0
    GRUB_HIDDEN_TIMEOUT=0
    GRUB_HIDDEN_TIMEOUT_QUIET=true
    GRUB_TIMEOUT=10
    GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null...
  12. [SOLVED] Re: Not able to control Brightness in my VAIO CW15FG laptop

    I installed the Nvidia drivers from software-properties-gtk,
    changed the xorg.conf file like this :



    Section "Device"
    Identifier "Default Device"
    Driver "nvidia"
    ...
  13. [SOLVED] Re: Not able to control Brightness in my VAIO CW15FG laptop

    I've downloaded the nvidia drivers from Nvidia site.
    I don't know the version but I hope the filename "NVIDIA-Linux-x86_64-304.64.run" gives you the information you needed..
  14. [SOLVED] Re: Not able to control Brightness in my VAIO CW15FG laptop

    Pastebin for /var/log/dmesg

    PasteBin for /var/log/Xorg.0.log
  15. [SOLVED] Re: Not able to control Brightness in my VAIO CW15FG laptop

    The results for cat /proc/cmdline :

    BOOT_IMAGE=/boot/vmlinuz-3.5.0-18-generic root=UUID=446e1f28-d397-4eef-a7fb-fa0eda88129a ro quiet splash vt.handoff=7

    The results for lsmod :

    Module ...
  16. [SOLVED] Re: Not able to control Brightness in my VAIO CW15FG laptop

    acpi_backlight=vendor statement is also not working.

    These are my results for cat proc/cmdline :

    BOOT_IMAGE=/boot/vmlinuz-3.5.0-18-generic root=UUID=446e1f28-d397-4eef-a7fb-fa0eda88129a ro...
  17. [SOLVED] Re: Not able to control Brightness in my VAIO CW15FG laptop

    This info is available in my /etc/default/grub
    GRUB_DEFAULT=0
    GRUB_HIDDEN_TIMEOUT=0
    GRUB_HIDDEN_TIMEOUT_QUIET=true
    GRUB_TIMEOUT=10
    GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo...
  18. [SOLVED] Not able to control Brightness in my VAIO CW15FG laptop

    I've installed Ubuntu 12.10 recently.
    When ever I press Fn keys along with F5/F6 it shows that the brightness decreases / increases accordingly. But no difference on the screen.

    I tried...
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