WiFi and bluetooth don't work simultaneously

[RiteshChandnani]

I recently updated Ubuntu to 18.04 LTS (kernel - 4.15.0-64-generic) and intially the WiFi was not working so I installed rtl8723de from https://github.com/lwfinger/rtlwifi_new

I also had to set the antenna to 2 since the WiFi signal was very weak, so I used the command mentioned in the above git repo, i.e. 

sudo su -
echo "options rtl8723be ant_sel=2" > /etc/modprobe.d/50-rtl8723de.conf
exit

The problem is  when the WiFi is on bluetooth won't connect to any device, but if I turn off the WiFi bluetooth works. They just don't work simultaneously.
Here is some system info -
Wireless Info 

Please help me resolve this.

[RiteshChandnani · Accepted solution]

Ok I found the solution, we have to update the file `/etc/modprobe.d/iwlwifi.conf` as -

options iwlwifi bt_coex_active=Y

 
Do a complete shutdown and start again.