Lenovo G50 does not switch on WIFi on initial boot or upon resuming system

Question

I recently acquired a Lenovo G50, after installing Ubuntu 14.10 (updated to the latest), I could not connect via WiFi. I found a solution that asked me to do sudo modprobe -r ideapad-laptop that only fixed the problem temporarily because whenever I closed the lid of my laptop, I could not connect back to the WIfi when I returned. In fact, I have to restart the machine altogether and run the sudo modprobe -r ideapad-laptop command again, which sort of sucks.

I also found another solution sudo killall NetworkManager that worked only a few times.

So I wonder, there must be a solution that.

1. Permanently fix the WiFi, i.e. being able to resume automatically to reconnect
2. Stabilize it such that I do not have to come so close to the router or Internet source

Which are these solutions?

PS: I am relatively new to Ubuntu, I will be happy to answer any questions you may have.

Edit: Added the output of lspci and lsusb:

lspci

00:00.0 Host bridge: Intel Corporation Atom Processor Z36xxx/Z37xxx Series SoC Transaction Register (rev 0e)
00:02.0 VGA compatible controller: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Graphics & Display (rev 0e)
00:13.0 SATA controller: Intel Corporation Device 0f23 (rev 0e)
00:14.0 USB controller: Intel Corporation Atom Processor Z36xxx/Z37xxx Series USB xHCI (rev 0e)
00:1a.0 Encryption controller: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Trusted Execution Engine (rev 0e)
00:1b.0 Audio device: Intel Corporation Atom Processor Z36xxx/Z37xxx Series High Definition Audio Controller (rev 0e)
00:1c.0 PCI bridge: Intel Corporation Device 0f48 (rev 0e)
00:1c.2 PCI bridge: Intel Corporation Device 0f4c (rev 0e)
00:1c.3 PCI bridge: Intel Corporation Device 0f4e (rev 0e)
00:1f.0 ISA bridge: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Power Control Unit (rev 0e)
00:1f.3 SMBus: Intel Corporation Device 0f12 (rev 0e)
02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10)

lsusb

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 006: ID 0bda:b728 Realtek Semiconductor Corp. 
Bus 001 Device 005: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 004: ID 5986:055d Acer, Inc 
Bus 001 Device 003: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
Bus 001 Device 007: ID 0461:4d15 Primax Electronics, Ltd Dell Optical Mouse
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub