OK, I tested the 3.15.0-031500rc1-generic_3.15.0-031500rc1.201 kernel and I get the same behaviour. A11 bios is the latest one for my laptop.
OK, I tested the 3.15.0- 031500rc1- generic_ 3.15.0- 031500rc1. 201 kernel and I get the same behaviour.
A11 bios is the latest one for my laptop.