I have an headless system running Ubuntu 14, with a xtion pro live camera connected to do some live video elaboration. Sometimes on boot (every morning is power on, but this is happening ramdomly) the camera is not recognized and dmesg shows:

usb 1-2: device descriptor read/8, error -110 usb usb1-port2: unable to enumerate USB device

The camera is not even listed in lsusb. What I tried without any success is:

The only working solution is to poweroff/poweron the computer (not feasible as is an headless system, it poweroff every night, and poweron every morning but I'd avoid waiting next day when the problem occurs). Is there any solution to simulate the physical disconnection of the device (I not even sure if this would work) or the poweroff for what USB concerns? Any ideas will be appreciated, thank you.

  • Here you might find your solution: stackoverflow.com/questions/4702216/… – Petr Jan 4 '18 at 10:58
  • it doens't work – rok Jan 4 '18 at 11:31
  • Try uhubctl -R -a cycle. But it will work only if your hub supports per port power switching (to be recognized by uhubctl). – mvp Jan 21 '18 at 7:45
  • it's already in the attempts list without any success.. – rok Jan 24 '18 at 14:02
  • @rok: did you try with -R? Adding -R will try to use appropriate USB reset mechanism supported by your OS (Linux in this case). – mvp Feb 2 '18 at 0:28

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