Having some frustrating issues with my setup. When I first put this all together it worked for a few weeks, now its a problem every day.
First the setup:
MB Pro 2017(purchased inDecember)
Elgtato Thunderbolt 3 dock. (https://www.amazon.com/gp/product/B01MZ2ATGK/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1)
Iogear dual display KVM(I work from home and need to switch between MB and Windows machine)
Two Dell S2340M monitors.
One of the monitors is connected via the dock's displayport connector(with an adapter).
The other is connected via the dock's thunderbolt port(with an adapter).
Again, this worked fine for a while. Now this is consistently the problem:
If I boot the MB with the dock attached, the boot process hangs at about 2/3s of the way through the progress bar. Its definitely hung, I let it go for 1/2 hour one day and it didn't make any progress.
If I boot the MB without the dock, log in, and then attach the dock, both monitors turn on, but the one attached via thunderbolt is not recognized as a Dell S2340, and is given a 640x480 resolution.
If I temporarily unplug and replug the thunderbolt display connection, the monitor is detected properly and all is well.
So it seems its just an initialization issue.
Prior to Sierra(I'm running HS on this) with my old MB Pro, this occasionally happened(there was no elgato dock at that time obviously), you could hold down the option key in the display system preferences and press "detect displays" and it would re-detect the monitor and fix the resolution issue. However, that has zero effect in HS. I suspect this is an HS problem since it didn't do it with either the new or old macbook.
Does anyone know a way to force the OS to re-detect a the displays like it used to? Maybe a terminal command?
First the setup:
MB Pro 2017(purchased inDecember)
Elgtato Thunderbolt 3 dock. (https://www.amazon.com/gp/product/B01MZ2ATGK/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1)
Iogear dual display KVM(I work from home and need to switch between MB and Windows machine)
Two Dell S2340M monitors.
One of the monitors is connected via the dock's displayport connector(with an adapter).
The other is connected via the dock's thunderbolt port(with an adapter).
Again, this worked fine for a while. Now this is consistently the problem:
If I boot the MB with the dock attached, the boot process hangs at about 2/3s of the way through the progress bar. Its definitely hung, I let it go for 1/2 hour one day and it didn't make any progress.
If I boot the MB without the dock, log in, and then attach the dock, both monitors turn on, but the one attached via thunderbolt is not recognized as a Dell S2340, and is given a 640x480 resolution.
If I temporarily unplug and replug the thunderbolt display connection, the monitor is detected properly and all is well.
So it seems its just an initialization issue.
Prior to Sierra(I'm running HS on this) with my old MB Pro, this occasionally happened(there was no elgato dock at that time obviously), you could hold down the option key in the display system preferences and press "detect displays" and it would re-detect the monitor and fix the resolution issue. However, that has zero effect in HS. I suspect this is an HS problem since it didn't do it with either the new or old macbook.
Does anyone know a way to force the OS to re-detect a the displays like it used to? Maybe a terminal command?
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