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#1 2013-09-21 21:47:14
- Gigamo
- Member
- Registered: 2008-01-19
- Posts: 394
[SOLVED] Backlight folder (/sys/class/backlight) empty, not using GRUB
I've recently installed Arch on my laptop (a macbook pro 5.5), and an important thing I haven't managed to get working is the backlight brightness.
I guess the main problem is that my /sys/class/backlight directory is empty, and thus playing with xbacklight does nothing. I've tried googling, and the main solution that keeps coming up is to add "acpi_backlight=vendor" to the GRUB config, but I'm using UEFI with gummiboot.
Any ideas?
Last edited by Gigamo (2018-01-08 09:26:11)
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#2 2013-09-21 21:50:22
- jasonwryan
- Anarchist
- From: .nz
- Registered: 2009-05-09
- Posts: 30,424
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Re: [SOLVED] Backlight folder (/sys/class/backlight) empty, not using GRUB
You can still pass kernel parameters using gummiboot...
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#3 2013-09-21 22:07:42
- Gigamo
- Member
- Registered: 2008-01-19
- Posts: 394
Re: [SOLVED] Backlight folder (/sys/class/backlight) empty, not using GRUB
You can still pass kernel parameters using gummiboot...
I figured as much, but I hadn't seen any examples, so wasn't sure. I'll give that a try and see how it works, thanks.
Edit: Installing "nvidiabl" instead of "nvidia-bl" from the AUR in combination with the boot option seems to have given me nvidia_backlight under /sys/class/backlight. This can be marked as solved.
Last edited by Gigamo (2013-09-21 23:26:37)
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