I've a Raspberry Pi 3 B+ with Ubuntu 18.04 installed.

With an SSH connection with my Kubuntu PC, the transfer is good (4.5Mo/s) when RPi's screen is OFF (via xset dpms force standby) but if the RPi's screen is ON (xset dpms force on), the flux is only 1Mo/s.

Do you know why ? Does the HDMI port shared ?

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