I have found a critical problem which requires the tech support urgent attention.
I have purchased over 100 units of the older NUC model. Although I am not very satisfied with it, it more or less did the job for me.
Since there is no way to purchase the older model any more I am left with no choice but to work with the new Celeron model (NUC5CPYH)
The problem is that at times, the OS (both Win 8.1 Home 64 bit and Win 10 Home 64 bit) would discard the Speakers in playback devices and it show the Speakers device as not plugged in / disconnected.. although that's not the case at all.
The problem occurred in multiple NUC5CPYH units, I would say in about 8 units out of 10 I tried, so it is most likely not a faulty unit but a general problem with this model regarding SW/HW or what ever..
It would show me Realtek Digital Output as default/active device, which is false. There is no conflict with the HDMI audio because there is no HDMI connection (or, at time there was HDMI dummy connected, but the same thing happened when there was no dummy at all)
After hours or days of working properly, the speakers playback device would disappear and nothing would bring it back (enable/disable the playback device and/or re-insert the audio 3.5mm audio cable) unless I do a Windows restart!! After a restart it would continue to work properly, until the next time..
I have tried everything I can think of to try and solve this problem myself:
- I've made sure I have all the latest drivers, including the BIOS version and the Realtek audio, all from the relevant NUC driver page. The latest BIOS version that was tested with this issue was 0053 and the problem still persisted. I have just noticed today that there is a new BIOS version 0054 but in the release details there is no mention of the problem, so I guess it would not do much help in that regard. Latest Realtek Audio driver that was tested was 188.8.131.5230.
- I have tried in most cases connecting the audio output from the rear output (which is also optical).. but I have also tried the same thing from the front and it was the same.
- I also tried some workarounds, I have tried to alter the Realtek 'advanced device settings' so that the front and rear audio jacks would wort simult. also tried to disable auto pop up.. but that also didn't help.
- I thought perhaps it's about a messed up connection sensor so I went ahead and disabled in the registry editor the EnableDynamicDevices to zero so that the sensor would be disabled, but that did not help solve the problem.
Please see screenshot attached.