Thank you for your reply, sorry for my poor English . My laptop is Dell-7573-i7-8550u-uhd620-gtx940mx-4k. Now only one problem left , when i use the HDMI port connect a LG 4k monitor, the monitor got no signal after wake up, no matter I turn it off and on, or switch HDMI1 to HDMI2 and back. When I switch HDMI1 to HDMI2 , the monitor shows "find signal on HDMI1", but after I switch it back, the monitor still got no signal . I have tied platform-id 59160000\59160009\591B0000 to drive the uhd620 -5917, only the id 591C0005 with clover boot arg -cdfon make the both display work well. 59160000\59160009 also work ,but need one more clover boot arg enable-hdmi20 to make the LG monitor work. After i use HibernationFixup.kext with clover boot arg -wegnoegpu , my laptop can sleep and wake up well , but after wake up the LG monitor got no signal. Sorry i cann't show you the real connection information, because i didn't at home, but I have wrote it on the picture below. Thank you !