We just got two Surface Hub 2S at work, but I've been unable to make touch-back work on a single USB-C cable. In theory, it's supposed to deliver power, 4K display, and touch-back (pen included) through a single USB-C 3.1 Gen-2 cable, and yet so far I've tried:Two different and brand new USB-C cables (relatively premium, 3.1 Gen 2 spec)Two different devices (Surface Pro 7 on USB-C, and Lenovo t490s on both USB-C and Thunderbolt3 ports)And yet, I'm always getting Power + 4K@60Hz display, but no touchback (nor pen).If I connect through Miracast and plug the USB-C I can get both display and touch-back, but resolution is dismal and Miracast lag makes it hard to enjoy the "touch-pen" experience. Is there anything I'm missing?Any idea or advice? Thanks in advance, Daniel PS: Both computers detect a "Guest Touchback Board" input device, which shows in Device Settings, and both of them recognize the Surface Hub 2s as some kind of Touch panel with "limited functionality"

Hello Daniel, This is something we're looking at. Seems like this happens after the device resumes from sleep. Can you try to restart just to confirm that you have the same behavior? Thank you, Cezar

Should I keep the USB-C plugged when restarting ?Or simply ensure I plug the USB-C cable after a fresh start ?(I'll check it out tomorrow morning Japan time)

hi dgr4it, If I understood it well, plug in the USB-C after the restart but would help if you could try both Thank you, Cezar

Thanks for the info cezarcretu I'm afraid however, tried both ways with both computers (only one cable this time around).Plug the USB-C cable after a fresh start (power from shutdown)Plug the USB-C while shutdown, then start the Surface Hub 2SUnfortunately, still the same issue (have 4k@60Hz video and power delivery, but touchback not working despite being recognize as "Guest Touchback Board" in the PC side. Wonder if there might be a firmware update dealing with these issues, but since I have no admin rights to the Hub it's hard to tell if it's up to date or not.

Hello dgr4it, Could you try with another USB-C cable or test with another device? If this returns the same behavior, kindly open a support case to investigate Thank you, Cezar

Touchback not working with USB-C display (Surface Hub 2S)

cezarcretu
Microsoft
Jun 25, 2020
Hello Daniel,

This is something we're looking at. Seems like this happens after the device resumes from sleep. Can you try to restart just to confirm that you have the same behavior?

Thank you,

Cezar
- dgr4it
  Iron Contributor
  Jun 25, 2020
  Should I keep the USB-C plugged when restarting ?
  Or simply ensure I plug the USB-C cable after a fresh start ?
  (I'll check it out tomorrow morning Japan time)
  - cezarcretu
    Microsoft
    Jun 25, 2020
    hi dgr4it,
    
    If I understood it well, plug in the USB-C after the restart but would help if you could try both
    
    Thank you,
    
    Cezar
ERay70
Copper Contributor
Jun 13, 2022
dgr4it did you ever find a fix for this?
- dgr4it
  Iron Contributor
  Jun 14, 2022
  ERay70 I'm afraid I didn't, but I don't have the Surface Hub to play around anymore (our company just gave up on it, and since then I've moved somewhere else).
  - jo-chemla
    Copper Contributor
    Oct 17, 2024
    I've come to the same conclusion after trying to troubleshoot Touchback not supported - although detected, drivers up-to-date etc - from a windows 11 23H2 host to 2 different a Surface Hub 3 with different USB-C/TB4 cables. But would love to get insight from microsoft tech provider, we're in Paris France TZ if your are still around cezarcretu !
    
    Issue also referenced here and here

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Touchback not working with USB-C display (Surface Hub 2S)

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