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[Loki <1320070@xxxxxxxxxxxxxxxxxx>]

There is some problem with the wifi. 
After an hour or two of the connection falls off. 

The logs found nothing interesting. 
How to catch the problem?

Notebook is Lenovo B5400

$ dmesg
[   52.943279] audit_printk_skb: 123 callbacks suppressed
[   52.943282] type=1400 audit(1401691960.498:68): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/cups/backend/cups-pdf" pid=2367 comm="apparmor_parser"
[   52.943287] type=1400 audit(1401691960.498:69): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd" pid=2367 comm="apparmor_parser"
[   52.943605] type=1400 audit(1401691960.498:70): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd" pid=2367 comm="apparmor_parser"

$ cat /var/log/syslog
Jun  2 11:47:33 tp-lenovo-b5400-ubuntu NetworkManager[847]: <warn> nl_recvmsgs() error: (-33) Dump inconsistency detected, interrupted

$ uname -a
Linux tp-lenovo-b5400-ubuntu 3.13.0-29-generic #52-Ubuntu SMP Wed May 28 12:42:47 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

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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:
  In Progress
Status in “linux” source package in Trusty:
  Fix Committed
Status in “linux” source package in Utopic:
  In Progress

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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