WiFi drops - EDIMAX EW-7811Un - Raspberry Pi Forums

hi everyone

have compute module on cmio board, running 2014-12-24 raspbian wheezy.
installed edimax ew-7811un wifi dongle on usb , pretty worked straight out of box once set wpa-supplicant information.

issue facing if wifi interface idle drops off network few seconds @ time.
if keep wifi interface busy (for example, doing ping compute module router) wifi stays no problem.

example if use ssh login compute module machine, ssh session stop responding if idle more few seconds.

if logon compute module via serial console, , there keep wifi busy doing :
ping 192.168.1.254 (my router address) ssh session work perfectly.

cannot see in /var/log/messages or /var/log/kernel explain why drops , re-establishes wifi when idle.

ideas?

could power management issue although takes rather longer few seconds kick in when wifi idle.

however, try adding file /etc/modprobe.d/8188eu.conf

code: select all

sudo nano /etc/modprobe.d/8188eu.conf

and adding single line content

code: select all

options 8188eu rtw_power_mgnt=0 rtw_enusbss=0

this disable power management 8188eu driver.


mrengman

raspberrypi