I installed ArchLinux on my iMac 12.1 today and everything seems to work like a charm. I am using the OpenSource radeon-driver which work well (Radeon HD 6770M).
The Fn-Keys setting the backlight via
but this does not work. The thing is that I can change the backlight via
echo 10 > /sys/class/backlight/radeon_bl0/brightness
and this works.
What can I do now, to get the Fn-Keys working? Can I change the behaviour of the Fn-Keys or can I fix the acpi_video0 part?
Haha, right after the post I found the solution... xD
I added "acpi_backlight=vendor" to my kernel boot parameters....
Last edited by -MacNuke- (2013-03-14 21:32:40)
don't know how to thank you enough. Now I can dim my screen so low that even smartphones can't do.
I tried echo 1 > and, even in the darkest environment, it's so dimmed that it barely emitted the light and barely was able to be seen, lol.
If it doesn't work out of the box, then you should fill in a kernel bug report. Workarounds like acpi_backlight=vendor are not normally meant to be used.
Grit, welcome to the Arch Linux forums. Please take a moment to read through the forum etiquette; particularly the section regarding old threads and necrobumping.
Mobo: ASUS P8Z77-V PRO // Processor: Intel Core i7-3770K 3.4GHz // GFX: nVidia GeForce GTX 970 Ti // RAM: 32GB (4x 8GB) Corsair DDR3 (@ 2133MHz) // Storage: 1x 3TB Seagate SATAII 5x 1TB Samsung SATAII, 2x 120GB Corsair SSD
Making lemonade from lemons since 2015.