The comments on this page indicate that the issue resolves after following the steps. One person claims to have the same laptop as well. It will update your drivers with the newest available.
The model of the device (RTL8821AE) is very important, we will come back to this later.
For some reason, realtek adapters have a history of disconnects and signal drops, but, lucky for us there is an answer.
sudo apt-get install linux-headers-generic build-essential git
git clone http://github.com/lwfinger/rtlwifi_new.git
cd rtlwifi_new
make
sudo make install
These commands build and install the drivers for rtl8192ce, rtl8192se, rtl8192de, rtl8188ee, rtl8192ee, rtl8723ae, rtl8723be, and rtl8821ae all in one go.
Just in case the system doesn’t load the appropriate kernel module, you can execute the following command from within your rtlwifi_new directory
sudo modprobe rtl8821ae
and reboot your system.
Best Answer
Write this: sudo iwconfig
Now, find your adapter name- http://i.imgur.com/9H5zbWj.png
sudo iwconfig wlan0 power off
Replace 'wlan0' with yours.