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Screen sometimes goes black during boot at half-bar Apple Logo & Gets stuck at Black Screen when Changing Resolutions


Sniki
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Hi Everyone.

 

i have a Lenovo ThinkPad L440 running MacOS Sierra 10.12.2 with latest Clover Version.

 

Intel Core i5 4300m

Intel HD Graphics 4600

BCM94352z Wifi

Realtek ALC292

Samsung SSD 128GB

OEM Display Panel was 1366x768 (Upgraded to *LTN140HL02* IPS 1080p Display Panel)

 

so far i managed to get almost everything working except:

  • iMessage
  • Trackpoint
  • SD Card & VGA port (which to be honest i don`t even consider them as an issue since VGA is a legacy stuff and about SD Card Reader i have a USB HUB with a SD Card which works all fine.)

 

But i have a really annoying problem with my Upgraded Display Panel which is Manufactured by Samsung (LTN140HL02) its a 1080p display and looks really good but sometimes the laptop screen goes black at half apple logo bar during boot and stays at that state until i force hold power button to Shutdown/Restart.

It doesn`t happen everytime boot its really annoying.

The same issue can be produced if i change display Resolutions at Sysprefs>Display and go from 1920x1080 to 1600x900 or 1366 x 768 or vice versa,

System Hangs at black screen if i try switching 2-3 times from one resolution to the other,its really annoying.u can`t game or use any other full screen app where u set different resolution than your native 1920x1080,you are forced to use 1920x1080 so the display doesn`t change resolution so the bugg can appear.

i tried to share screen or remote control,for some reasons none of them work.

for example i set Teamviewer to launch at boot,tried to reboot few times to produce the bug,after screen goes black,i can see on my other laptop that L440 has just signed in notification,i try to connect but gets stuckk at connecting.

i tried screen share,if laptop boots normally screen share works,if it is on that black screen state,it gets stuckk at connecting.

So i think when screen stays black the system hangs/freezes or something because i first thought its a EDID issue but i can say that it doesn`t seem to be the case.i dumped from windows,injected on clover,created a display override,still same issue.

 

Hope someone has came across this and have a solution.

 

On my Old OEM display Panel,i don`t have that problem.

The new panel works fine on Windows,it has no issues.

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