请教各位大佬,19 年买的 mbp,插上转接线外接屏幕时会黑屏,怎么回事?

[lugoyoung]

mbp 充满电的情况下,有时候连接转接线,会出现 mbp 黑屏的情况,这种情况下,插上电源线又好了 间接性出现这种问题,请教各位大佬有没有解决方案?

[davidfly]

好像外接屏幕必须接电源

[Newass]

19 款的 mbp 还用的是 5500M 独立显卡，外接显示器必须使用独立显卡（基于个人折腾经验），只用集成显卡没办法外接屏幕，你可以通过命令行开关是否使用独立显卡

# Always use the integrated graphics card while running on battery power
sudo pmset -b gpuswitch 0

# Always use the discrete graphics card while running on battery power
sudo pmset -b gpuswitch 1

# Switch between discrete and integrated graphics cards automatically while running on battery power
sudo pmset -b gpuswitch 2

The -a, -b, -c, -u flags determine whether the settings apply to battery ( -b ), charger (wall power) ( -c ), UPS ( -u ) or all ( -a ).

[lugoyoung]

@Newass @davidfly 感谢哥