where is the backlight dimmer?

[dansar]

dan@dan-HP-G60-Notebook-PC:~$ for interface in /sys/class/backlight/*; do echo -e "\n $interface"; cat $interface/{brightness,max_brightness,actual_brightness}; done

/sys/class/backlight/*
cat: /sys/class/backlight/*/brightness: No such file or directory
cat: /sys/class/backlight/*/max_brightness: No such file or directory
cat: /sys/class/backlight/*/actual_brightness: No such file or directory

[Mike]

Thank you. Welp, I'm not sure what's going on then. Since you're just starting out with LL, may I recommend that you download and try the new 3.0 beta? It uses a newer version of Xfce with several improvements. It may or may not work out better for you. Sure, it's beta but it might get you by without issue until the final release. Sorry I couldn't help you get that working.

If you'd like to try one last thing, add "video.use_native_backlight=1" to your grub config similar to what Wirezfree suggested near the beginning of this thread. Then reboot.

[dansar]

That's fine  ..I can live with it til the final release.  Thank you for trying to help...much appreciated    Dan

[Mike]

No problem, always happy to help (or try)! 

[dansar]

ok...I was able to install the brightness app on this live usb.  So evidently the LL distro on my HD is bad. how to install ..right click on taskbar..go to ADD NEW ITEMS..click on brightness control plugin...That works fine on this live usb.  Dan

[aus9]

OOPS missed seeing the bit where OP says its solved. Ahh well I will leave it here in case it helps others

Code:

acpi_listen

An internet search suggests running above command.....and then pressing the Function key and the Function number key to dim......or whatever has been setup to dim the screen, and it should show a result.  My image comes from an old Dell which does not use function keys but Fn + up or down arrows for brightless levels.

[Carney]

Mike...Would not accept the fn key or any f key. Maybe my function keys are disabled.  I learn something new everyday Thank you  Dan

I have this problem too.

I can get change screen brightness fine with a Fn and F5 or Fn and F6 keystroke, but I'm trying to find a way to eliminate the need to hit the Fn key, and just make the F5 and F6 keys act by default as if the Fn key had been held down.