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I've been having problems connecting an external monitor to my MacBook for a long time. I'm using a MiniDP to DP cable and sometimes the external monitor just

by jannes 8y ago

I've been having problems connecting an external monitor to my MacBook for a long time. I'm using a MiniDP to DP cable and sometimes the external monitor just wouldn't get any signal after sleeping the laptop with the cable plugged in. Unplugging the cable or power cycling the monitor doesn't help at all. I have to completely restart the laptop to get a monitor signal again. I wonder if that's due to the pin 20 issue. The funny thing is that I actually bought 4 different cables already and all of them have the same problem.

Sholmesy 8y ago
I've been having a similar issue, across multiple different DP cables, (DP -> DP). My screen will just shut off, and refuse to turn back on for minutes at a time. It will also randomly flicker once every 10-15 minutes (for like 3-4s, then back to normal). I've tried two different DP cables, and two different DP ports, but its the same issue, and the HDMI ports I have don't support 144hz 1440p =\. Such a frustrating interface. Would love if someone could weigh in with advice.
- stanley 8y ago
  Perhaps unrelated, but I have a similar problem with my hackintosh and a monitor connected via HDMI. The other monitor (same model) connected to the same GPU via DisplayPort has no such issues. Restarting the machine seems to be the only way to get the HDMI monitor to start working again.
  - pram 8y ago
    Putting the computer to sleep resets it for me. Only happens on anything that isn’t DP (HDMI and DVI->DP) Annoying for sure.
joosters 8y ago
Same here! My computer is a Mac mini and also using a mini DP to DP cable. There’s a 20% chance that the monitor will get stuck in power-saving mode when turning it on. When this happens, rebooting my Mac is the only way I’ve found to make it come back. I’ve tried many cables :(
leetbulb 8y ago
try unplugging/re-plugging the monitor's power cable. i have this same issue every now and then and the only solution i've found is a hard power cycle of my monitor.
- stinos 8y ago
  Again shows the brilliance of the "have you tried turning it off and on again?" line :]

by jannes 8y ago

Sholmesy 8y ago

I've been having a similar issue, across multiple different DP cables, (DP -> DP). My screen will just shut off, and refuse to turn back on for minutes at a time. It will also randomly flicker once every 10-15 minutes (for like 3-4s, then back to normal). I've tried two different DP cables, and two different DP ports, but its the same issue, and the HDMI ports I have don't support 144hz 1440p =\. Such a frustrating interface. Would love if someone could weigh in with advice.

stanley 8y ago
Perhaps unrelated, but I have a similar problem with my hackintosh and a monitor connected via HDMI. The other monitor (same model) connected to the same GPU via DisplayPort has no such issues. Restarting the machine seems to be the only way to get the HDMI monitor to start working again.
- pram 8y ago
  Putting the computer to sleep resets it for me. Only happens on anything that isn’t DP (HDMI and DVI->DP) Annoying for sure.

joosters 8y ago

Same here! My computer is a Mac mini and also using a mini DP to DP cable. There’s a 20% chance that the monitor will get stuck in power-saving mode when turning it on. When this happens, rebooting my Mac is the only way I’ve found to make it come back. I’ve tried many cables :(

leetbulb 8y ago

try unplugging/re-plugging the monitor's power cable. i have this same issue every now and then and the only solution i've found is a hard power cycle of my monitor.

stinos 8y ago
Again shows the brilliance of the "have you tried turning it off and on again?" line :]