Q:

Ubuntu 18.04 Wifi slow on HP Laptop with Intel Centrino Wireless-N 2230 & Realtek RTL8111/8168/8411 PCI

Here's my setup:
   description: Wireless interface
   product: Centrino Wireless-N 2230
   vendor: Intel Corporation
   logical name: wlo1
   version: c4
   width: 64 bits
   clock: 33MHz

   description: Ethernet interface
   product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
   vendor: Realtek Semiconductor Co., Ltd.
   physical id: 0
   logical name: eno1
   version: 07
   size: 10Mbit/s
   capacity: 1Gbit/s
   width: 64 bits
   clock: 33MHz

Wifi barely connects and when it does is extremely slow (< 1mbps).
Tried using various iwlwifi.conf settings, but none seem to work.
options iwlwifi 11n_disable=1

Any help would be appreciated.

A:

From: Ubuntu Forums - Intel Centrino Wireless-N 2230 connection is very slow
Success was found using:
echo "options iwlwifi 11n_disable=8" | sudo tee -a /etc/modprobe.d/iwlwifi.conf

Of course since you've alread setup the iwlwifi option you can simply change the 0 to an 8.
Apparently 0 was old school and 8 is for newer drivers (sometime before September 2014 when OP posted question).

