D415 Camera off line
In some computers of the same type, the camera will drop off.And restart the computer or drop the line.It only works when you unplug the camera and insert it again.So,I want to know why.
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It is a problem that is known about but not easy to solve when it may be related to particular models of computer. The advice in the link below, and the comments beneath it, may be useful to you.
https://github.com/IntelRealSense/librealsense/issues/5913#issuecomment-595579190
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Hi MartyG.
After a period of time, new problems first appeared.In the past, when the camera was offline, the device could be found under /dev, but the software could not be opened.So,I added hardware_reset() to the code.It was solved at that time.But now, you can't find a camera under /dev.
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A lot of people use their own choice of USB cable instead of the supplied one because they need a much longer cable. This can affect connections if it is not a high quality cable. That is why I asked.
Not all USB ports are made equal, even though USB is a standard. So on some computer models the camera may work fine and on others it may have problems because of the USB port on that particular machine. So if you have problems with a particular model of computer, and all of the computers that you have are that same model, you may have the same problems on all of them.
Do the cameras work at first and then stop working after you have started and stopped streaming a few times?
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Which camera firmware driver version is your camera using, please? Updating the firmware to a recent version can help to correct problems. For example, firmware version 5.12.5 added a fix for problems occuring after the infrared stream has been stopped and started a few times.
Regarding running the camera over multiple days: if the camera remains within recommended operating temperatures then it can run indefinitely. If problems do occur after more than a day (for example on day 3), if the camera temperature is okay then it is likely to be due to a problem that has manifested on the USB cable / port, the computer hardware or its operating system software and not the camera hardware.
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Some days have passed.Now I've found something new.The previous camera is offline. At least the device number of the camera can be seen under /dev to ensure that the camera is connected.Then I use hardware_reset() to solve this problem temporarily through your suggestion.But now I can't find the camera device number under /dev.It doesn't work to plug in the camera USB cable again or restart the computer.It is worth noting that this is the case on USB3.0, which is still working stably on USB2.0.
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There are a small number of cases where a hardware_reset(), unplug-replug or even a soft reboot (restart the PC without turning it off) does not correct a problem, and only a full shutdown (power-off) and boot with a press of the power button causes the camera to be detected again. There is a long discussion about this subject in the link below:
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