Originally Posted by coloxim
Sorry...this kernel is comparible with jkay brightness profile?
Inviato dal mio GT-I9100 usando Tapatalk
No - And right now, I am unaware of any kernel that is. As much as I like JKay's work, I believe he lacks understanding of how screen brightness works on the I9100 and I777.
Even JKay is unaware of any kernels that support those profiles. See entry 12 in his FAQ.
To implement additional brightness steps, an additional gamma table for each brightness step needs to be implemented - https://github.com/Entropy512/linux_...ld9040_gamma.h
So until FAQ section 12 has clearly defined (and achievable) requirements for compatibility, or JKay declares a specific kernel compatible in FAQ section 12 of his mod, I won't be doing anything. Creating a custom gamma table entry is not easy as it requires a LOT of tweaking and good colorimeter hardware. Supercurio has done it at high brightness levels to my knowledge, but I don't think he's done it for low brightness levels and I don't think he's added extra gamma tables for additional brightness steps.
Edit: I have seen that Speedmod and Redpill do change the table entries for the lowest two brightness settings - however, they don't add any new bins, so the brightness change is achieved even on JKay profiles that don't supposedly require kernel support. e.g. JKay's "dark, requires kernel support" are pointless because the only kernels that actually provide dimmer minimum backlight do so even with his profiles that don't claim to require custom kernels. (And the "super dark" and "dark" profiles will behave the same regardless of kernel.)
What's interesting is hardcore did it for only two of three available panel types. Either two of Samsung's panel types are brighter than others, or hardcore did this without testing on some panel variants and just thought "the numbers are different, I'll change them". I'll look into playing with this as it would be nice to have lower minimum brightness, but it's somewhat low priority as it's easy to simply make things look like **** if you're not careful.