This thread describes the initial issue that we’re seeing here as a regression.
@aplattner explicitly mentioned that
I have a similar Clevo laptop that also has the brightness control problem. The good news is that one of my colleagues tracked it down to a new type of brightness control method used by these panels that wasn’t enabled in the Linux driver. He’s working on a fix to wire that up properly.
(Yes, I’ve previously mentioned it in this thread).
Can this “new type of brightness control method” be fixed after half a year of non-working backlight control, please?
The sysfs entries are here, so it’s wired up to some degree, but for some reason not controlling the correct registers.
Is this information helpful?