External display randomly goes black every 10 minutes

[peteyio]

Hey all,

I have a 2017 MacBook Pro w/ Touch Bar 15". Whenever I am home from work, I often dock it with an Acer XR342CK 34" widescreen curved monitor alongside connect up a wireless keyboard/mouse etc.

Without going into the long story, this is in fact my second MacBook Pro from Apple as my first one had several faults - so this laptop is essentially brand new - just a couple of weeks old.

Since getting this new laptop from Apple (new and sealed), I've been having an issue whereby every 10 or so minutes, my external display will go black for no reason - for around 2-3 seconds, before then returning to normal. Everything is still going on in the background and music still plays - the screen simply goes black out of nowhere - something I didn't have an issue with on my first MacBook Pro 2017.

I connect to the monitor using a USB-C to DisplayPort cable - I've tried 2 of them from 2 different brands with the same result. I've also tried replacing the power brick with another one to no avail. If I connect with a HDMI cable through the Multi-AV Adaptor, everything is fine but I only get 30Hz instead of the 75Hz through DisplayPort.

Any ideas?

 

[WhoIsJOB]

Same thing happening to me, with the addition of the colours becoming inverted...

Anything yet?

(The picture is a photo of Office Excel by the way...)

 

[jav6454]

GPU is dying.

 

[Naimfan]

GPU is dying.

On a 2017?

 

[jav6454]

On a 2017?

GPUs can die at any moment.

 

[peteyio]

Not sure I necessarily agree. If I use my work monitor which is an LG 34" curved at the same resolution over HDMI, there's 0 issues whatsoever. It's only when driving the same resolution over USB-C to DP that there's a problem.

 

[EmaT]

Same problem here, with MacBook Pro 13" 2017 and external monitor BenQ PD3200U connected with a UsbC-to-HDMI cable.

Apparently the problem was greatly mitigated after I switched off "Automatically adjust brightness" in the options for the MAIN screen (not the external one!).

 

[epoxboy]

thanks EmaT! I tried your trick and found it doesn't work in my case. But I found by adjusting "Turn display off after" time, my screen blackout occurs at different time now, basically from 30mins to 1 hr. So I think it's definitely a Apple software bug causing this screen blackout.

external monitor blackout for 2 seconds

I have a 13" Macbook Pro 2017 version, no security chip. Initially I just connected with a Philips 32" 2K monitor (model BDM3270) via a usb-c to HDMI dongle, all good!Then I bought another Philips 32" 4K monitor (model 328P6VU) with USB-C docking capability, and connected with my Macbook Pro via...

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