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 Airtpop HDMI ports 
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Joined: Sat Jun 01, 2019 9:25 am
Posts: 2
Post Airtpop HDMI ports
We have an Airtop (i7, no nVidia GPU) running windows 10. The computer is connected to to a LG 34UM95 (3440x1440) moinitor by HDMI. With the monitor connected to the bottom HDMI port it gets audio signal and 50hz refresh rate, connected to the top HDMI port, by the same cable and into same input on the monitor, there is no audio signal and the refresh rate drops to 30hz. We've tried re-installing the graphics drivers without observing any change.
According to specifications it seems that both HDMI ports should have the same bandwidth. Any pointers would be greatly appreciated.

Sat Jun 01, 2019 7:29 pm
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Joined: Mon Dec 25, 2017 4:21 pm
Posts: 283
Post Re: Airtpop HDMI ports
Sorry for the late reply.

I would like to make sure, you claim that one of the internal HDMI ports coming from your Airtop, is not forwarding audio signals to your monitor and its refresh rate is slower ? (30Hz compared to 50Hz)

Could you please provide the driver version you have currently installed from the device manager?

Wed Jun 12, 2019 12:08 pm

Joined: Sat Jun 01, 2019 9:25 am
Posts: 2
Post Re: Airtpop HDMI ports
That is correct.

When the problem was discovered we had a recent driver from Intels webpage, now we have version downloaded from the support wiki with the same result.
To further troubleshoot the SSD was swapped out with a spare one and a fresh install of Windows 10 was performed with the same result. Then the computer was connected to 4k monitor, with this monitor we got 4k@24 hz as expected on "HDMI 1" and only 1920x1080 on "HDMI 2". This test was also perfomed with a single cable on same input for both ports.

Thu Jun 13, 2019 7:28 pm
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