My HP EliteBook 840 does not have a HDMI port but a displayport, so I got an adapter to HDMI. I tried to connect to a Samsung TV (UE-50JU6870) via the adapter and a HDMI cable but it stays on black screen with "no signal".
I have tried with the open-source and the proprietary driver (fglrx) for my graphic card (Advanced Micro Devices, Inc. [AMD/ATI] Mars [Radeon HD 8730M]).
I have a dual boot with windows 7, there the TV is detected.
Any ideas? Thanks!