Comment # 25 on bug 1191795 from Frank Kr���ger

(In reply to Art Hemming from comment #24)
> > A - Can both of you confirm that a fresh reboot with TLP disabled fixes the
> > bug?
> > B - Art, with a fresh reboot after TLP has been disabled, please try out
> > whether power/control to auto causes the bug
> > C - Frank, after stopping tlp.service, please confirm that returning
> > power/control to auto the bug reappears
> > D - Art, after stopping tlp.service, please confirm that setting
> > power/control to on fixes the bug
>
> D - Confirmed. 
> Stopping tlp.service and waiting 60 seconds results in /power/control = ON
> and no bug behavior is observed
JFYI: For me it switches almost immediately from auto to on, resulting in a
working ethernet network.