[SOLVED] /sys/class/backlight empty

florosus · 2016-01-03 13:35:22

I have been trying to troubleshoot my missing brightness slider in GNOME shell. I have installed nvidiabl, put it as a module in mkinipcio.conf, put the option to enable backlight control in both xorg.conf and 20-nvidia.conf, put acpi backlight vendor in my efistub config, and it still doesn't work!!! The /sys/class/backlight folder is empty and at boot systemd complains that it couldn't load kernel modules! I'm obviously missing a trick here, am I not? Please reply if you have any, any suggestions.

Last edited by florosus (2016-01-03 18:57:19)

Head_on_a_Stick · 2016-01-03 13:36:55

Have you tried the suggestions on the ArchWiki page?
https://wiki.archlinux.org/index.php/Ba … ne_options

florosus · 2016-01-03 13:45:24

Head_on_a_Stick wrote:

Have you tried the suggestions on the ArchWiki page?
https://wiki.archlinux.org/index.php/Ba … ne_options

Yes, tried that, my /sys/class/backlight folder is still empty!

headkase · 2016-01-03 15:14:43

florosus wrote:

..put it as a module in mkinipcio.conf..

Sanity check, you did rebuilt your initial ram disk right?:

sudo mkinitcpio -p linux

https://wiki.archlinux.org/index.php/Mk … activation

florosus · 2016-01-03 15:18:45

headkase wrote:

florosus wrote:
..put it as a module in mkinipcio.conf..
Sanity check, you did rebuilt your initial ram disk right?:
sudo mkinitcpio -p linux
https://wiki.archlinux.org/index.php/Mk … activation

Yes, definitively!

I have a suspicion that brightness control only works for laptop lcds, whereas I am using a Dell U2711 beastly CCFL 27" monitor connected to a full tower via DP!
Am I right? Otherwise, this entire thread is redundant

Head_on_a_Stick · 2016-01-03 15:32:11

^ Yes, you are right.

Last edited by Head_on_a_Stick (2016-01-03 15:35:08)

jasonwryan · 2016-01-03 18:50:49

Please edit your first post and remove the histrionics from the title: https://wiki.archlinux.org/index.php/Fo … ow_to_post

Arch Linux

#1 2016-01-03 13:35:22

[SOLVED] /sys/class/backlight empty

#2 2016-01-03 13:36:55

Re: [SOLVED] /sys/class/backlight empty

#3 2016-01-03 13:45:24

Re: [SOLVED] /sys/class/backlight empty

#4 2016-01-03 15:14:43

Re: [SOLVED] /sys/class/backlight empty

#5 2016-01-03 15:18:45

Re: [SOLVED] /sys/class/backlight empty

#6 2016-01-03 15:32:11

Re: [SOLVED] /sys/class/backlight empty

#7 2016-01-03 18:50:49

Re: [SOLVED] /sys/class/backlight empty

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