[Thebluevoice]

This is exactly the same thing I experience on my NUC7CJYH. Turning on any sort of info overlay on the screen stops the "stutter". It doesn't happen all the time, but I'm going to try and grab a debug log today when it does.
Looks like there was someone else with the same issue that solved it with some config changes to DRI/Mesa - https://forum.kodi.tv/showthread.php?tid=299115&page=7

it looks like /etc/drirc is read-only on libreelec and i wasn't able to add the lines to the configuration. anyone know how to try this fix on /etc/drirc?  

Can you test with build #0702b: Generic and confirm it the stutter is any better/worse/no different? Don't force i915_min_freq when testing this build.

#0702b includes a commit that reverts a change added in 4.17-rc1 which aims to avoid boosting the GPU unnecessarily but which seems to have the effect of never allowing the GPU to boost at all when being used by Kodi (tested on Skylake).  

 Hi Milhouse,

I just tried your #0702b and it fixed the jerky playback on both a 1030 celeron and a j5005 gemini lake. 

The jerkiness is still present in the latest libreeelec alphas (which use the latest kodi rc).

Is this because the libreelec guys need to apply the fix to libreelec?

Is the fix likely to be in the first kodi 18 libreelec release - is it best I post over their to make them aware?

Cheers!