Why is the HDMI external display is so slow on my MacBookPro 10.1?

asked 2017-04-23 03:58:37 -0600

MatthiasKonka gravatar image

updated 2017-04-24 05:47:47 -0600

I installed Fedora 25 Workstation (Gnome) on my Apple MacBookPro 10.1 retina display 15", dual booting with OSX.

I boot Fedora 25 with my external monitor connected using HDMI (Acer KA220HQbid B00Z03HSP2 resolution 1920x1080)

Boot screen appears correctly on both displays (MacBook Pro and external)

Login screen appears only on the MacBook Pro retina display

I logged in then I used Gnome "Display Preferences" to turn off the internal display to use only the external one.

The external screen displays everything correctly but the UI becomes extremely slow. If I connect the external display AFTER the boot process and AFTER the user log in, everything works fine.

The video drivers used in Fedora 25 are the standard ones supplied during the installation. No additional driver was installed. Do you have any suggestion to fix this glitch?

The Graphic Cards installed in my MBP are - Intel HD Graphics 4000 - NVIDIA GeForce GT 650M with 1GB of GDDR5 memory and automatic graphics switching Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 2560 by 1600 pixels on up to two external displays, at millions of colors ( https://support.apple.com/kb/SP653?lo...US&viewlocale=enUS)

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