Arch Linux

Higlav

Member

Registered: 2016-12-09

Posts: 39

[SOLVED]Brightness adjustment on an Acer laptop

Hello there,

I just installed Arch successfully on my Acer Aspire V3-571G, which has two graphics cards: Intel(disabled) and Nvidia(I already installed the mandatory driver packages). I used systemd-boot as bootloader(so those grub-solutions I found so far don't apply to my case).

"lspci | grep VGA":

00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GK107M [GeForce GT 640M] (rev a1)

"xbacklight":

No outputs have backlight property

"ls -la /sys/class/backlight":

0 total
drwxr-xr-x  2 root root 0 28. Dec 19:14 .
drwxr-xr-x 54 root root 0 28. Dec 19:14 ..
lrwxrwxrwx  1 root root 0 28. Dec 17:50 intel_backlight -> ../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight

"acpi_listen", then [Fn]+[Left-Arrow(Brightness1)] and [Fn]+[Right-Arrow(Brightness2)]:

video/brightnessdown BRTDN 00000087 00000000
 PNP0Cl4:00 000000bc 00000000
 PNP0Cl4:00 000000bc 00000000
 PNP0Cl4:00 000000bc 00000000
video/brightnessup BRTUP 00000086 00000000
 PNP0Cl4:00 000000bc 00000000
 PNP0Cl4:00 000000bc 00000000
 PNP0Cl4:00 000000bc 00000000

Could please anyone tell me what to do to:

1. Adjust the brightness

2. Be able to adjust the brightness via the laptop Fn-keys?

Last edited by Higlav (2016-12-28 21:47:33)

Slithery

Administrator

From: Norfolk, UK

Registered: 2013-12-01

Posts: 5,776

Re: [SOLVED]Brightness adjustment on an Acer laptop

Those 'grub solutions' you mention aren't grub specific, you can change kernel parameters no matter which bootloader you're using.

https://wiki.archlinux.org/index.php/Kernel_parameters

Last edited by Slithery (2016-12-28 20:41:18)

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No, it didn't "fix" anything. It just shifted the brokeness one space to the right. - jasonwryan
Closing -- for deletion; Banning -- for muppetry. - jasonwryan

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Higlav

Member

Registered: 2016-12-09

Posts: 39

Re: [SOLVED]Brightness adjustment on an Acer laptop

Thank you once more, slithery for helping me.
I mounted the EFI-partition onto /boot and edited my arch-boot-entry so that the options end in:

acpi_os_name=Linux acpi_osi=

As described here(post #9). I don't know whether the first attribute has to be set too(too long of a day to try that out now) but it works now.