No Wifi with Realtek RTL8723BE on Ubuntu 16.04

[Sreyan Chakravarty]

I have installed Ubuntu 16.04 on my laptop alongside Windows 10. I am
unable to access my home Wifi because of a very weak signal even if I keep
the laptop near the router.

I have tried installing the driver as per the instructions over here

https://askubuntu.com/questions/635625/how-do-i-get-a-realtek-rtl8723be-wireless-card-to-work/635629#635629

But I keep getting the following error when I am installing my driver-:

(Reading database ... 174937 files and directories currently installed.)
Preparing to unpack rtlwifi-new-dkms_0.10_all.deb ...

------------------------------
Deleting module version: 0.10
completely from the DKMS tree.
------------------------------
Done.
Unpacking rtlwifi-new-dkms (0.10) over (0.10) ...
Setting up rtlwifi-new-dkms (0.10) ...
Loading new rtlwifi-new-0.10 DKMS files...
First Installation: checking all kernels...
Building only for 4.8.0-36-generic
Building for architecture x86_64
Building initial module for 4.8.0-36-generic
Error! Bad return status for module build on kernel: 4.8.0-36-generic (x86_64)
Consult /var/lib/dkms/rtlwifi-new/0.10/build/make.log for more information.


The contents of make.log are as follows-:

DKMS make.log for rtlwifi-new-0.10 for kernel 4.8.0-36-generic (x86_64)
Sun Jul 30 17:10:27 IST 2017
make: Entering directory '/usr/src/linux-headers-4.8.0-36-generic'
  LD      /var/lib/dkms/rtlwifi-new/0.10/build/built-in.o
  CC [M]  /var/lib/dkms/rtlwifi-new/0.10/build/base.o
In file included from /var/lib/dkms/rtlwifi-new/0.10/build/base.c:30:0:
/var/lib/dkms/rtlwifi-new/0.10/build/wifi.h:1327:40: error:
‘IEEE80211_NUM_BANDS’ undeclared here (not in a function)
  struct ieee80211_supported_band bands[IEEE80211_NUM_BANDS];
                                        ^
/var/lib/dkms/rtlwifi-new/0.10/build/base.c:138:10: error:
‘IEEE80211_BAND_2GHZ’ undeclared here (not in a function)
  .band = IEEE80211_BAND_2GHZ,
          ^
/var/lib/dkms/rtlwifi-new/0.10/build/base.c:150:10: error:
‘IEEE80211_BAND_5GHZ’ undeclared here (not in a function)
  .band = IEEE80211_BAND_5GHZ,
          ^
scripts/Makefile.build:289: recipe for target
'/var/lib/dkms/rtlwifi-new/0.10/build/base.o' failed
make[1]: *** [/var/lib/dkms/rtlwifi-new/0.10/build/base.o] Error 1
Makefile:1491: recipe for target
'_module_/var/lib/dkms/rtlwifi-new/0.10/build' failed
make: *** [_module_/var/lib/dkms/rtlwifi-new/0.10/build] Error 2
make: Leaving directory '/usr/src/linux-headers-4.8.0-36-generic'


Is there any way I can get the wifi to work ? It works fine on Windows with
the Realtek RTL8723BE driver.

Why is Wifi so buggy on linux ?

Let me know if any other info is needed from my side.

Regards,
Sreyan
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