Issue with WiFi dropping

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wwfoste
Issue with WiFi dropping

I'm in the testing phase right now and have been having intermittent issues with the wifi dropping and not being recoverable. My set up is an A+ with a Belkin USB port and the Edimax wifi dongle. I've tried turning off the power management but that didn't work. This is how I attempted that:

sudo nano /etc/modprobe.d/8192cu.conf

And added:
# Disable power saving
options 8192cu rtw_power_mgnt=0 rtw_enusbss=1 rtw_ips_mode=1

I almost wonder if it's the USB port not having enough power. This is what I have: http://www.amazon.com/Belkin-4-Port-Hi-Speed-USB-Mobile/dp/B00BDV0LO0.

Has anyone had this issue and fixed it?

Paul
Paul's picture
Wi-Fi auto reconnect to AP

Try step 2 here:
http://hivetool.org/w/index.php?title=Create_SD_Image_Version_0.72#Set_u...

There is a link to the original article at the bottom. I stopped putting the code in the image as Adrian suggested that the latest releases of raspian didn't need it.

Please let me know if that takes care of the problem.

wwfoste
Wifi reconnect

I'll try that when I get home, but I'm not sure it'll do it. When it drops, the GUI will no longer even locate a wifi source until I reboot.

wwfoste
Wifi dropping

I tried to do this fix, but when I tried 'cp /etc/ifplugd/action.d/ifupdown /etc/ifplugd/action.d/ifupdown.org' I got this response:

cannot stat '/etc/ifplugd/action.d/ifupdown': No such file or directory.

I reloaded hive tool onto my SDHC. Now it connects to the Wifi briefly, then says wlan0 disassociated with my internet and drops it. I can still see my wifi as an option on the GUI, but it won't connect.

lsusb finds the wifi dongle. Ifconfig won't show an IP address for wlan0.

Paul
Paul's picture
I just tried the cp command

I just tried the cp command on Carl's hive, Timbuktu. I am pretty sure it is running 0.7.3

Try this:
$ ls /etc/ifplugd/action.d
action_wpa ifupdown ifupdown.org

If no luck, try drilling down through the directories one at a time (cd /etc then cd ifplugd then cd action.d) and see how far you get.
You will have to put sudo in front of the cp command but if you didn't, you should have gotten a different error, like:
cp: cannot create regular file â/etc/ifplugd/action.d/ifupdown.orgâ: Permission denied

Paul
Paul's picture
I just tried the cp command

I just tried the cp command on Carl's hive, Timbuktu. I am pretty sure it is running 0.7.3

Try this:
$ ls /etc/ifplugd/action.d
action_wpa ifupdown ifupdown.org

If no luck, try drilling down through the directories one at a time (cd /etc then cd ifplugd then cd action.d) and see how far you get.
You will have to put sudo in front of the cp command but if you didn't, you should have gotten a different error, like:
cp: cannot create regular file â/etc/ifplugd/action.d/ifupdown.orgâ: Permission denied

Oops. I just checked SIERRA1 and the file is not there. OK. Let me figure out why not.

Paul
Paul's picture
The ifupdown script is not there any more.

The ifupdown script is not there any more.
What happens if you run
iwconfig
and
iwlist wlan0 scan

For testing, do you an open AP to try? I'm guessing it is a problem with authenticating. Do you know what kind of authentication it is using? iwlist wlan0 scan should tell what the AP is using.

Also, I think you have two APs? if so, can you turn off the one that is not being used (just for testing)?

wwfoste
Looks like it was the usb hub

After messing around with it this morning, it looks like the USB hub didn't have enough power to run the wifi, the pi, the temperhum, and a combination of the output to the monitor, a keyboard, and a mouse.

So I did this current configuration: The A+ with the Wifi dongle in the USB port, the 4 load cells plugged into the interface board, the Pi powered by the micro USB which is plugged into the USB hub, and the Temperhum plugged into the USB hub. The Wifi will work, but I can only work through ssh or VNC. But now the system won't pick up the TemperHum. When I do lsusb it only registers the wifi dongle and the usb hub itself. Sounds like I may have to get a different USB hub, unless you know of something different I can try.

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