How to fix function keys (FN) issue after upgrading to ubuntu 10.04(Lucid)
Problem
If you just updated to 10.04 and you might be experiencing issues with your function keys supposed to control screen brightness on my Asus UL30a It worked fine in 9.10.
Workaround
Open up Terminal and enter the following
gksudo gedit /etc/default/grub
Look for the line that says GRUB_CMDLINE_LINUX and add this
GRUB_CMDLINE_LINUX="acpi_backlight=vendor"
Save it and then update Grub
sudo update-grub
Reboot your system.
Article source
is not working with HP Probook 4310s (ATI 4330)
brightness sets manually here: /proc/acpi/video/DGFX/LCD/brightness
but using ”acpi_backlight=vendor” now it says:
cat /proc/acpi/video/DGFX/LCD/brightness
Fn keys is not working too.
It works great now. Thanks for your tip!
How could I get this to work for the volume keys on my laptop, it has two of the f keys mapped to volume when you hold down the fn key but when I use them the volume goes nuts all over the place?
I also haven’t gotten this to work with my fn+F4 (toggle screen) key on my HPdv3 yet.
won’t work on eMachines D725 Lucid Lynx
The volume keys on my IBM ThinkPad G41 still don’t work along with any of the function keys 🙁
Hi There,
The fix does not work for HP DV3-2154ca laptop! Please help. would really appreciate that
Regards,
Abhi
In my Acer Aspire 4736, following change worked. In /etc/default/grub,
GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash acpi_osi=Linux”
Hey Deepak, thank you for the tip, I also have an Acer Aspire 4736 and now I can finally change the brightness of the screen.
The only problem now is that is working in the oposite direction, the brighter button makes the screen darker and vice-versa.
I did this to my Acer 5742z-4685 Ubuntu 10.04
GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash acpi_osi=”
this fixed the brightness but, the icon don’t show wile changing, strange, the icon worked when the fn+brightness didn’t, the volume works fine..
hope this helps everyone..good luck….
Just wanted to say thank you… works perfectly on my HP dv3t-2000.
Thank you very much, been looking for this for some time. Works like a charm on my asus b50a!
I had a problem I tried both ways but when I was going to update the second way it gave me this massage
/etc/default/grub: 9: splash”: not found
and I have found that the brightness change bar is not appearing
thanks dude!! now it is working