Same issue with Lenovo M93z. Using Kernel 3.14.3, as suggested by Gioele Barabucci, solves the problem.
The Lenovo M93p Tiny had the same problem; however, on 2014-08-13 Lenovo released a BIOS update, which solves the issue.
So I recommend anyone still affected by this to just use the vanilla Kernel.
Same issue with Lenovo M93z. Using Kernel 3.14.3, as suggested by Gioele Barabucci, solves the problem.
The Lenovo M93p Tiny had the same problem; however, on 2014-08-13 Lenovo released a BIOS update, which solves the issue.
So I recommend anyone still affected by this to just use the vanilla Kernel.