I'm running SLES12SP3 latest image on RPI3B.
At the moment, there is only PWR LED during operation. ACT LED only light up for a brief moment when power connected to the RPI, but then it stays OFF during system operation.
I don't have this problem when using other distro (Raspbian and Ubuntu) on this RPI3B.
Can someone help me how to enable ACT LED?

Appreciate all the help.
Thanks.