Comment 29 for bug 1240940

After install upgrades with new kernel i have this error in dmesg and wifi still not work.

My notebook is Lenovo B5400

$ dmesg | grep rtl
[ 10.753070] rtl8723be: Using firmware rtlwifi/rtl8723befw.bin
[ 10.753150] rtl8723be 0000:04:00.0: irq 47 for MSI/MSI-X
[ 11.135041] rtl8723be 0000:04:00.0: Direct firmware load failed with error -2
[ 11.135044] rtl8723be 0000:04:00.0: Falling back to user helper
[ 11.179233] rtlwifi: Firmware rtlwifi/rtl8723befw.bin not available

$ modinfo rlt8723be
modinfo: ERROR: Module rlt8723be not found.
loki@tp-lenovo-b5400-ubuntu:~$ modinfo rtl8723be
filename: /lib/modules/3.13.0-27-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723be/rtl8723be.ko
firmware: rtlwifi/rtl8723befw.bin
description: Realtek 8723BE 802.11n PCI wireless
license: GPL
author: Realtek WlanFAE <email address hidden>
author: PageHe <email address hidden>
srcversion: B4AEA7435E87596435F3F22
alias: pci:v000010ECd0000B723sv*sd*bc*sc*i*
depends: rtlwifi,rtl8723-common,rtl_pci,btcoexist,mac80211
intree: Y
vermagic: 3.13.0-27-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: 23:98:4A:C2:03:78:43:25:CC:F7:B9:5B:51:F6:C1:19:38:0E:B9:33
sig_hashalgo: sha512
parm: swlps:bool
parm: swenc:using hardware crypto (default 0 [hardware])
 (bool)
parm: ips:using no link power save (default 1 is open)
 (bool)
parm: fwlps:using linked fw control power save (default 1 is open)
 (bool)
parm: debug:Set debug level (0-5) (default 0) (int)

$ uname -a
Linux tp-lenovo-b5400-ubuntu 3.13.0-27-generic #50-Ubuntu SMP Thu May 15 18:06:16 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

Also tried:
$ sudo modprobe rtl8723be
it did not help