Asus UX303LA fn brightness keys not working

Question

I've searched everywhere for a solution.

I've tried this:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pcie_aspm=force acpi_backlight=vendor acpi_osi="

each variable on it's own and different combinations. Also acpi_osi=Linux

In all of them fn+f5 and fn+f6 (for brighness) fn+f2 (for airplane mode) doesn't work. They don't even register in acpi_listen or xev.

I dont think all the acpi packages are installed by default anymore; have you installed all the relevant acpi dependencies? — mchid, Aug 04 '15 at 02:15
also, I believe you are supposed to have acpi_backlight=vendor or acpi_osi= as others have reported acpi_osi= not working with acpi_backlight=vendor present http://askubuntu.com/a/603980/167115 — mchid, Aug 04 '15 at 02:36

score 1 · Accepted Answer · edited Apr 13 '17 at 12:24

1

Since those keys don't have acpi functionality, you can set the function manually through ccsm using xbacklight commands.

Run the following commands:

sudo apt-get update
sudo apt-get install compizconfig-settings-manager xbacklight

Now, press ALT + F2, type ccsm, and then press ENTER.
Next, enable the commands plugin and then click on the commands plugin.
Enter the command command line 0.
Click on the key bindings tab and click disabled on the command line 0 row.
Check the enabled box, click grab key combination and then press the key combo you would like to use to increase the brightness (fn + F6 for example). Click okay.
Finally, do the same for "command line 1" to set the brightness decrease except use the command xbacklight -dec 10 and use a different key combo (of course).

Thanks to this answer here provided by @TejasGhalsasi

You can set similar keyboard combos for other functions. The command to turn off wifi is:

nmcli r wifi off

and the command to turn wifi back on is:

nmcli r wifi on

edited Apr 13 '17 at 12:24

Community

answered Aug 04 '15 at 03:05

mchid

Thank you a lot. I can't upvote you but this really helped me. Thanks again for putting the time to write all this. – Atrotors Aug 04 '15 at 10:42
@Atrotors also, I think airplane mode is actually nmcli r all off not sure if that covers Bluetooth – mchid Aug 04 '15 at 17:04
My combo grab is weird. It wont pick up, fn + (F1, F6, F8, F9) (wifi, mouse screen dim, screen bright) but will pick up fn + (F2, F3, F4, F5, F7) blank, mute, vol down, vol up, blank. wifi and screen dont work at all, mouse and volume do. This is very very strange to say the least. i cant see why some work and some dont, its not duff buttons because the keys all work without fn pressed – CodingInTheUK Feb 20 '16 at 21:00
@Chris It depends on the model. Some models, like toshiba, apple, and thinkpads have packages that are available through apt-get that enable the fn keys. Use apt-cache search to search for these. Also, enabling acpi sometimes helps. – mchid Feb 21 '16 at 21:23

1 Answers1