[ubuntu] System 76 Pangolin wireless failed

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http://ubuntuforums.org – I have new System 76 Pangolin laptop. When Ubuntu first installed, wireless worked fine. I could see the internet and the wireless-attached printer on my Linksys home network. After a day or so, wireless no longer works. It is not a home network problem, because several other laptops on the same network work fine. Seems like my wifi card (Realtek rtl819xSE) is no longer powered on? The various options (enable networking, enable wireless) have no effect. All worked originally, now has stopped. jaa75 (HowTos)