(In reply to Takashi Iwai from comment #1) > Is this a kernel regression from 4.7.x? > > In anyway, could you report this to upstream, e.g. bugzilla.kernel.org? > Feel free to add me (tiwai@suse.de) to Cc there for further tracking. Kernel regression - I would say yes. I have been running 4.7.x on TW from 4.7.1? to 4.7.6, and never had any issues with the i2c controller (and as it is mastering the touchbad, I would have been aware of any issues immediately). I think suspend/resume worked at least once with 4.8.3 but I have to check, currently I do not have the Laptop available. Will report upstream later today.