This workaround fixed this issue for me:
echo "options iwlwifi bt_coex_active=0" | sudo tee -a
/etc/modprobe.d/iwlwifi.conf
The above instructions set a bunch of unrelated options, and also blank
out any pre-existing content.
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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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