Arch Linux

juozapas

Member

Registered: 2010-02-13

Posts: 6

Apple Imac 2011 Backlight issue

Hey,

So Im trying to make backlight work on this old machine, specs here.

$ lspci | grep VGA
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Whistler [Radeon HD 6630M/6650M/6750M/7670M/7690M]

$ ls /sys/class/backlight/            
acpi_video0

As you see, I don't have radeon in here ^, and whatever I set to as acpi_video0 values - it doesn't make any difference.

I tried various booting options, acpi_backlight=vendor etc, nothing helped.

I'm using mesa driver.

All the rest works well on Imac out of the box, Im just struggling with this damn backlight adjustment. Would really appreciate some help here! Thanks!