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[ockels <219057@xxxxxxxxxxxxxxxxxx>]

Stumbled across this bug installing 14.04.4 on my new HP 14-ac181 low-budget laptop.
First of all my wireless had unusable signal strength. After fixing it with the following code:

sudo add-apt-repository ppa:hanipouspilot/rtlwifi
sudo apt-get install rtlwifi-new-dkms linux-firmware rtl8723au-bt-dkms
echo "options rtl8723be ant_sel=2"  | sudo tee /etc/modprobe.d/rtl8723be.conf

Wireless & BT worked.

But Wireless & BT do not coexist together. The following things happen:

- Without an AC adapter BT does not discover any device
- With BT & Wireless both enabled BT is very slow (eg: A2DP sound gets choppy and out of sync) + my wifi speeds are unusable
- With eth cable, AC adapter and wireless disabled BT works like a charm

Expected behaviour:

All interfaces should work together.

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https://bugs.launchpad.net/bugs/219057

Title:
  Bluetooth does not coexist with WiFi

Status in bluez package in Ubuntu:
  Confirmed

Bug description:
  On my system bluetooth and wifi are unusable together. I have a built-
  in CSR-based bluetooth module in my laptop, and an Atheros wifi. Wifi
  transfers slow to a halt whenever there is BT traffic.

  For example, if I play a music file from another machine through the
  network using a BT headset, only the first few seconds of the file
  will play until the player runs out of buffered data. No further data
  is downloaded. Web pages also do not download, and I even lose
  connection to AP from time to time.

  At the same time, it looks like AFH is trying to work. If I monitor
  the value returned by 'hcitool afh', it changes. But this seems to
  have little effect on connection quality.

  Is this a problem with my hardware, or the AFH implementation? Is
  there a way to force bluetooth to not use the channels in use by WiFi?

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