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Linux - Embedded & Single-board computer This forum is for the discussion of Linux on both embedded devices and single-board computers (such as the Raspberry Pi, BeagleBoard and PandaBoard). Discussions involving Arduino, plug computers and other micro-controller like devices are also welcome.

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Old 09-29-2017, 01:28 PM   #1
zorro_kwh
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Registered: May 2007
Posts: 37

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Question Raspberrypi 3 Looses wlan0 after sometime


I am Running a raspberrypi 3 as a small Squid Proxy. but from time to time I need to log in and need to restart the wlan0 interface. The raspberrypi lost its network connection. I cannot reach the box using ping or ssh.

Network configuration /etc/network/interfaces
Code:
auto lo
iface lo inet loopback

iface eth0 inet static
    address 192.168.0.14
    netmask 255.255.255.0
    gateway 192.168.0.1
    dns-nameserver 192.168.0.1

auto wlan0
allow-hotplug wlan0
iface wlan0 inet static
    address 192.168.0.15
    netmask 255.255.255.0
    gateway 192.168.0.1
    dns-nameserver 192.168.0.1
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

pre-up iw dev wlan0 set power_save off
post-down iw dev wlan0 set power_save on

allow-hotplug wlan1
iface wlan1 inet manual
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
When I lost connection I need to log in directly and run the commands in a root shell
Code:
# ifdown wlan0
# ifup wlan0
To make it work again. How can I avoid this?

The interface is not allowed for power save.
 
Old 09-29-2017, 02:24 PM   #2
linux-sys-adm
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Registered: Oct 2012
Distribution: Debian
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I had this problem a year ago. It was faulty hardware. The USB dongle. I switched to a different brand and issue disappeared.
 
Old 09-29-2017, 06:26 PM   #3
syg00
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Location: Australia
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Is this the on-board wifi ?. I run mine 24x7 as router/gateway, never noticed an issue, but I have a small UPS in front of it.
 
Old 09-30-2017, 02:46 AM   #4
zorro_kwh
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Registered: May 2007
Posts: 37

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Onboard wifi

It is the onboard wifi. Because I want to have a fix adress I use a static configuration. Before I had an dhcp configuration. But I had this with dhcp too. So I tried static. Then I have googled to turnoff power save. But even with power save off I have the problem from time to time. I checked power save off with
Code:
iw wlan0 get power_save
 
  


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