External HDMI monitor detected but says "No signal" on Fedora 26 Macbook Pro

[Ivan Cadri]

Hello,

I've got trouble with my Macbook Pro running Fedora 26. I can't get an
external monitor to work via a Mini DisplayPort to HDMI converter. The
issue is full described on the link below:

https://ask.fedoraproject.org/en/question/108616/external-hd
mi-monitor-detected-but-says-no-signal-on-fedora-26-macbook-pro/

Any help would be really appreciated.

thanks