Comment 3 for bug 1459985

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Ville Ranki (ville-ranki) wrote : Re: r8169 ethernet stops working after a while

I updated the bios to latest provided by Lenovo, but the problem persists.

output of dmidecode -s bios-version && sudo dmidecode -s bios-release-date:
J9ET99WW (2.19 )
05/05/2015

This may also be a NetworkManager issue - i've filed bug #1461015 on nm with a error message in journal.