I have Ubuntu Mate 16.04.1 (LTS) in a MacBookPro. The wifi connects well and sometimes works fine, but it intermitently slows down incredibly, to the point that it cannot even load a website or complete an apt-get update. I've tried many of the solutions proposed online but I didn't find one that works. Do you have any advice?
This is the output of iwconfig, case it helps:
enp2s0 no wireless extensions.
lo no wireless extensions.
wlp3s0b1 IEEE 802.11abgn ESSID:"VGV75198F526B"
Mode:Managed Frequency:2.412 GHz Access Point: 84:9C:A6:8F:52:6B
Bit Rate=115.6 Mb/s Tx-Power=19 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=56/70 Signal level=-54 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:29999 Invalid misc:21413 Missed beacon:0
Thanks!