> > Aditya, can you perhaps test this on a model macbook which does > > actually use the apple-gmux driver for backlight control > > (assuming you have such a model) ? > > > > Hi Hans > > Since I own a T2 MacBook, I’ll have to apply some out of tree patches as well > from https://github.com/Redecorating/linux/commits/bits/010 gmux. I’ve > requested the maintainer although he believes they shouldn't break anything on > T2 Macs. I’ve still let a kernel compile without the out of tree patches, just > with yours and shall send the outputs by tomorrow. I'm the one that wrote those patches for gmux on the mmio T2 macs, and I've rebased them onto Hans' patchset with patch numbers 2004-2006 here https://github.com/t2linux/linux-t2-patches/tree/gmux It seems to work fine on my T2 Macbookpro16,1, the display backlight controls work and there aren't any other, not working, backlights present. > ls /sys/class/backlight gmux_backlight@