For external displays there is a custom resolution setting,
On the built-in display of the laptop you can not use the custom resolution setting, so please improve it.
Especially Kaveri APU has a problem that 1280 x 960 resolution does not exist.
Lenovo ThinkPad E455
CPU AMD FX 7500
GPU RADEON R7 Graphics
Driver Crimson ReLive 17.11
OS Windows 10 Pro Version 1607