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[Jarek Zgoda <jarek.zgoda@xxxxxxxxx>]

> sudo rmmod rtl8723be && sudo modprobe rtl8723be

This doesn't work for me - connection once dropped can not be
established anymore, I need to reboot.

$ uname -a
Linux JAZG-LENOVO 3.13.0-32-generic #57-Ubuntu SMP Tue Jul 15 03:51:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

$ dmesg | grep rtl
[    6.619502] rtl8723be: Using firmware rtlwifi/rtl8723befw.bin
[    6.632732] ieee80211 phy0: Selected rate control algorithm 'rtl_rc'
[    6.632936] rtlwifi: wireless switch is on

This is Lenovo B5400

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https://bugs.launchpad.net/bugs/1320070

Title:
  Realtek Wifi card RTL8723BE drops connection with MSI enabled

Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Trusty:
  Fix Released
Status in “linux” source package in Utopic:
  Fix Released

Bug description:
  As my testing result with ThinkPad E540 and other users' report[1],
  RTL8723BE drops connection with MSI enabled, need to backport
  329d6e299f92a591acb3a80f6d597a5f9dce7e6d "rtlwifi: rtl8723be: disable
  MSI interrupts mode"

  [1] https://bugs.launchpad.net/bugs/1240940

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