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15" tMBP: External USB

Since upgrading to macOS High Sierra 10.13, I've been having an issue with my late 2016 15" MacBook Pro (Radeon Pro 455 graphic card).

I'm using it connected to an Asus MX27UC 4K USB-C display. After waking up the MBP from sleep, the external screen picture will not stay on. It will lose sync every 10 seconds or so, only to work again a couple of seconds later. It will basically flash on-off in a 10-2 second rhythm.

Subsequent sleeps and resumes, as well as unplugging and re-plugging the display to USB-C will not help. A reboot also won't help. The only fix is to shut down the MBP and start it up again. Then it will work - until the next sleep.

It seems like they screwed up the Radeon display drivers with High Sierra. It only happens with DisplayPort over USB-C. HDMI/DVI is fine.

Is anyone experiencing similar issues with external displays?

最后更新：2017-09-28 04:18:18

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