psyke83/kernel_huawei_u8160 — comment on commit a17e3c2e38f962f4168456abadb7ca6c1bdfdd32
File:  line 0
By psyke83:

Open Dev Tools -> Pointer Location

With the phone in the normal portrait orientation, slide your finger from just outside the border of the right edge of the screen to the left.

Before this commit, your finger should not be detected at all if the movement originated from the edge of the screen. Other sides of the screen don't have this issue.