Acer Universal USB 3.0 Docking Station - Manual (Page 20)

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• Playing back protected contents over a USB connection.
• You may need to download additional CODECs for your viewing
program.
• Your system may not have the encode/decode capabilities. Please
check with the vendor to confirm the support and capabilities.
I encounter slow performance and the image lags or freezes
when playing videos on external displays.
• The CPU may be overloaded. Reduce the screen resolution or close
unnecessary programs.
• Ensure you have not set the display resolution too high. For details of
the supported display resolutions, please refer to "Supported
resolutions" on page 12.