Luca's Blog

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6 Sep 2021

Why monitor flicks on my ThinkPad Thunderbolt 3 Dock (40AC) Gen1?

Environment macOS Big Sur version 11.5 Issue The monitor “blinks” every couple of seconds. The MacBook Pro is connected to the ThinkPad Thunderbolt 3 Dock Gen1 (Model No: 40AC - DBB9003L1). The monitor is connected to the dock using the Displayport cable. The monitor(s) are configured as “extended”. Diagnostic Steps Usage with a Windows 10 laptop with the same dock and monitor does not recreate the issue. ...Read More

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