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[Jumpa <jumpa404@xxxxxxxxx>]

How do I undo the effects of this command?

echo "options iwlwifi 11n_disable=1 bt_coex_active=0 power_save=0
auto_agg=0 swcrypto=1" | sudo tee /etc/modprobe.d/iwlwifi.conf >
/dev/null

I tried it hoping it would help with wifi interference causing lag and
stuttering in my bluetooth speakers but now I can't even connect to the
speakers at all since rebooting.

Thanks!

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Packages, which is subscribed to bluez in Ubuntu.
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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