https://bugzilla.kernel.org/show_bug.cgi?id=153401
--- Comment #17 from Luca Viggiani <[email protected]> --- (In reply to Zhang Rui from comment #15) > > (In reply to Luca Viggiani from comment #13) > > Ok I have found a solution... > > In BIOS settings of the laptop I have disabled "Load Legacy Boot Options" > > from the Boot menu. > > That setting was required to be enabled before kernel 4.7.x in order to make > > the fn keys to work. Now it must be disabled. > > why it must be disabled? Otherwise you get the flash effect (see my original report) with kernel 4.7 > > > As a side effect now brightness changes in steps; before it was changing in > > a smooth way. But this is very minor thing. > > > how does it change in steps? For example if you are at 100% and set it at 90% it jumps immediately to 90%. The old behavior (kernel 4.6 + BIOS setting enabled) it changes smoothly from 100% to 90% in about one second. > > I'm still confused. > some questions: > 1. in 4.6 kernel, with BIOS option disabled, what it behaves like? fn keys to adjust brightness do not work > 1. in 4.6 kernel, with BIOS option enabled, what it behaves like? brightness can be adjusted; smooth transition between current and new value > 1. in 4.7 kernel, with BIOS option disabled, what it behaves like? brightness can be adjusted; step transition > 1. in 4.7 kernel, with BIOS option enabled, what it behaves like? Flash effect (smooth changes): for example if I set it to 50% it starts "bouncing" from 100% to 50% and back in a smooth way. -- You are receiving this mail because: You are watching the assignee of the bug. ------------------------------------------------------------------------------ _______________________________________________ acpi-bugzilla mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
