Wifi problem in Ubuntu 16.04

Hello,

I have installed Ubuntu 16.04 on my Lenovo U31 and having slow connection issues in Ubuntu. Windows is also installed on the same laptop and works fine. I would really appreciate any suggestion.

Some details:
After I installed Ubuntu, the wifi driver was not recognized. It started to work after I downloaded firmware files for the driver from this website. However, the speed is very slow and the signal is very weak. Very often the connection drops and asks for wifi password. Everything is fine if I connect with a cable.

iwconfig:

Code:

wlp3s0    IEEE 802.11abgn  ESSID:"Kuci"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 90:0D:CB:98:D7:E0   
          Bit Rate=1 Mb/s   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on
          Link Quality=50/70  Signal level=-60 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:42  Invalid misc:18   Missed beacon:0


enp2s0    no wireless extensions.


lo        no wireless extensions.

rfkill list all:

Code:

0: ideapad_wlan: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: ideapad_bluetooth: Bluetooth
    Soft blocked: yes
    Hard blocked: no
2: hci0: Bluetooth
    Soft blocked: yes
    Hard blocked: no
3: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

cat iwlwifi.conf:

Code:

options iwlwifi swcrypto=1# /etc/modprobe.d/iwlwifi.conf
# iwlwifi will dyamically load either iwldvm or iwlmvm depending on the
# microcode file installed on the system.  When removing iwlwifi, first
# remove the iwl?vm module and then iwlwifi.
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211

cat ath10k.conf:

Code:

options ath10k nohwcrypt=1

Thank you!

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Wifi problem in Ubuntu 16.04