Bumping this up. 2015 MacBook Air, D3100 dock, u3415w monitor (made by Dell), but the CPU usage is way up there. My computer’s getting alarmingly warm during anything graphics-heavy like video playback.
Plugging the monitor directly into the Mac via DisplayPort is substantially better, so there’s definitely a problem with the dock or the driver. Probably the driver, because I was using this dock with an XPS earlier this week with no issues.
Keeping the DisplayPort cable plugged in for now, but hopefully there’ll be a performance improvement in the future.
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