External Monitor resolution (would like 3840x2160)
#3
@Phillip Bell - The device you bought seems to support 30hz refresh only @ 4K, if this is the device;

https://www.amazon.com/Multiport-Adapter...B08FWPKVBG

According to the LG web side, the monitor only supports 60hz refresh rate;

https://www.lg.com/us/monitors/lg-43un70...ed-monitor

Their is only so much bandwidth possible from earlier devices. This 5 in 1 has 1Gbps Ethernet, 3 x USB 3 ports and the DisplayPort to HDMI. This generally means that 2 of the high speed lanes are DisplayPort out, (2K @ 60hz or 4K @ 30hz), and the other pair is for USB 3.x. Which is then broken out by a USB 3 hub to the 3 x USB 3 and the 1Gbps Ethernet.

In essence, you need to buy a device that only has USB 2.x support and allows all 4 high speed lanes for DisplayPort. A while back I did see some devices with a switch on them, to allow changing from external display using 2 or 4 lanes. But, it's probably simpler to find a USB 2.x only device.

Remember, Pinebook Pro only supports DisplayPort out. What the external adapter device then uses for an external display connector, DisplayPort or actively translating to HDMI, is up to the external adapter device.

See this Wiki page for some ideas:

https://wiki.pine64.org/wiki/Pinebook_Pr...te_mode_DP
--
Arwen Evenstar
Princess of Rivendale
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RE: External Monitor resolution (would like 3840x2160) - by Arwen - 11-11-2021, 10:08 AM

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