> Currently the backlight registration in apple-gmux.c is unconditional > (if a GMUX is detected). > > I have attached a patch to make it honor the acpi_backlight=xxx > kernel commandline option like most other x86/ACPI backlight drivers > do, please give this a test. > > Regards, > > Hans > Also, another issue, I have pluymouth enabled with FRAMEBUFFER=y. After using the gmux patches, the size of the theme has become too tiny for an initial few seconds, then it gets normal. I tested this by compiling a kernel without these patches, and the bug got fixed. I also tried using acpi backlight using command line (that made me discover the `acpi_backlight=video` not working bug). Is that also related to some upstream bug?