I have updated to kernel 4.17.0-041700-genericand installed the Bluetooth driver going through How to activate bluetooth device for RTL8723DE?. In earlier kernel driver it was doing well.
Edit : Now I have installed 5.6.0-050600-generic and bluetooth is working but wi-fi has gone
sudo dkms install rtlwifi-new/0.6
Kernel preparation unnecessary for this kernel. Skipping...
Building module:
cleaning build area......(bad exit status: 2)
make -j2 KERNELRELEASE=5.3.0-46-generic -C /lib/modules/5.3.0-46-generic/build M=/var/lib/dkms/rtlwifi-new/0.6/build.........................................(bad exit status: 2)
ERROR (dkms apport): binary package for rtlwifi-new: 0.6 not found
Error! Bad return status for module build on kernel: 5.3.0-46-generic (x86_64)
Consult /var/lib/dkms/rtlwifi-new/0.6/build/make.log for more information.