I'm having the same problem with my Lenovo Flex 2 with the same rtl8723be wireless card.
Kernel :
3.13.0-29-generic #52-Ubuntu SMP Wed May 28 12:42:47 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
gets the card to work. Internet works for extended periods of time, but will require the occasional reboot to get it back working. I tried upgrading to the v.3.15-rc8 I would break. I would get notification that it connected to the WiFi (DNS and all) but would never get any internet connection.
Reverted back to kernel above and back in a working state - till my next reboot. Not sure if this information helps at all.
I'm having the same problem with my Lenovo Flex 2 with the same rtl8723be wireless card.
Kernel :
3.13.0-29-generic #52-Ubuntu SMP Wed May 28 12:42:47 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
gets the card to work. Internet works for extended periods of time, but will require the occasional reboot to get it back working. I tried upgrading to the v.3.15-rc8 I would break. I would get notification that it connected to the WiFi (DNS and all) but would never get any internet connection.
Reverted back to kernel above and back in a working state - till my next reboot. Not sure if this information helps at all.