I was using 2.4.13 and it was lagging big time. Then just flashed 2.4.20 yesterday and the performance is much better.
I, too using ext4 to flash the ROM and so far no screen lock problem.
I did experience the screen lock problem in 2.4.13 whenever I use difference CPU governor or enable the GPU for 2D in apps.
The Motorola Defy Mini is a relatively popular device, despite not featuring … more
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