I have an Edimax EW-7811UTC WiFi adapter connected to my Pi 2 to connect it to the Internet.I also have connected it to my computer via Ethernet to share this connection.The problem is that when I power on the Pi with this setup, at a certain point the WiFi adapter LED starts blinking as if it were connecting to the network but then stops, and I have to unplug and plug it again for it to start working properly.This also happens sometimes when I power off/reboot the computer.
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I also noticed this as I also use a EDIMAX. It looks like that's a bug of the adapter. It doesn't happen with my Fritz Adapter.– Max MusterCommented Jun 14, 2016 at 21:35
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How have you configured networking? Without this we are working in the dark.– MilliwaysCommented Jun 15, 2016 at 0:06
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are you using a 2A power Adapter? because if not this will definitely cause a lot of problems for your wifi module– Shan-DesaiCommented Jun 15, 2016 at 6:42
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I'm using a 2.1A power adapter.My /etc/network/interfaces and wpa_supplicant.conf: pastebin.com/raw/MugHCmeT– user2859982Commented Jun 15, 2016 at 10:43
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I tried plugging my laptop when WiFi was connected and this was logged in syslog: pastebin.com/raw/0VgfW9ad– user2859982Commented Jun 15, 2016 at 12:44
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1 Answer
Solved it, the file /etc/ifplugd/ifplugd.action that gets called by ifplugd when eth0 is plugged executes all files in /etc/ifplugd/action.d, including action_wpa, which "disconnects any wpa-roam managed interfaces so that only one "roaming" interface remains active on the system" if an ifplugd managed interface is brought up.
Since I wanted to be able to hotplug eth0, I just commented out these lines:
#if wpa_action "${IFACE}" check; then
# wpa_cli -i "${IFACE}" "${COMMAND}"
#fi