Black Screens after boot when externam Monitor is connected!

Screen resolution, 3D Acceleration, nVidia, ATI
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phoriwan
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Black Screens after boot when externam Monitor is connected!

Post by phoriwan » Mon Jan 22, 2018 1:53 pm

I run LinuxMint XFCE 18.3 on my Dell Latitude E6440 (only Intel graphics - no GPU).

Additionally I connect a external monitor using HDMI. Everything is fine when I plug in the external monitor when Linux Mint is running.

However, when I boot the system having the external monitor connected, GRUB shows up on the Notebook display and then both displays remain black.

What can be the reason for the boot issue?!

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