MBA and Ultrawide (34" 5k2k MSI Prestige)

aperfectcircle

macrumors 6502
I know there's been a few threads on monitor issues, particularly larger scale and ultra wide. I have the MBA 8/8/16/1TB with an MSI Prestige 34" 5120x2160.

Originally had this connected via USB-C to USB-C. From the get-go, waking from sleep was barely workable. 9 times out of 10 it required either a re-plug of the USB-C cable, or turning the monitor "off and on again". Same experience whether clamshell or open.

Replaced the cable with a USB-C to DP cable, and it's like magic. I have yet to have a problem - under either 11.2 or the latest 11.3 beta - with consistent wake from sleep, resolution retention. Takes a couple of seconds, but we seem to be on a roll finally!

Thought I would share if others are having similar issues still. This could be MSI specific, so I can't vouch that it'll work for the LG 5k2k. It could also be a random combination of the MSI and my MBA just finding their yin and yang.
 
Which USB-C to DP cable are you using? I'm having the same issue, but I also have a CalDigit TS3+ between my Mac and the MSI display. So I'm going USB-C (Mac) to USB-C (Dock) and DP (Dock) to DP (display) and waking from sleep seems to be based on a random number generator.
 
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