I have a Lenovo G40-70 laptop, which comes with RTL8723be driver.
I'm using Ubuntu 14.04 LTS (with Kernel 3.16.0-38-generic), but this bug also occurs in 14.10 and 15.04.
options rtl8723be fwlps=0 ips=0, the problem is not fixed yet. Wireless is unstable, lots of websites keeps loading forever and Ping command frequently shows data loss. It's very annoying. :(
BIOS version is the latest.
ideapad_laptop also doesn't work.
Sorry my english and thank you!