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I ping a device on my network by its local IP. When the device is logged out (at lock screen), I get a wall of "Destination Host Unreachable". When the device is logged in, the pings return just fine. Remote is 16.04 Ubuntu MATE on a Raspberry Pi 3, via Wi-Fi. I originally thought I was having a ssh issue with home encryption, but I realized it's a general networking issue.

I could use your help determining whether this is a hardware or software setting issue.

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Did some digging and this is likely a wireless power save issue.

$ iw wlan0 get power_save Power save: on

For more, see this answer. I've since moved to a wired connection, which is stabler and doesn't have this boot/greeter issue. Hope you can benefit from my blind efforts

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