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haptic feedback randomly switches off after upd...

After updating to 10.13 Beta haptic feedback suddenly switches off. force touch is registered but there is no vibration. When I try to change "Click" Medium-Firm system freezes few secs. usually, feedback is back after a minute but sometimes needs a restart.

I did smc pram reset but didn't seem to help.

Any suggestions?

rMBP 2015

最后更新：2017-09-17 21:51:48

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