Brightness randomly changes after screen dim

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Hi there,

I just installed Fedora26 on my Lenovo Yoga 710, and everything wonderfully works well out of the box. However, after the screen dims (or after I lock my screen), the brightness starts to randomly jump around every half second or so. If I use the brightness hotkeys to change it, I can see the location on the control jump around randomly.

Any suggestions how to troubleshoot this? Thanks!