Created attachment 166601 [details]
Often when I use my bluetooth speakers for audio output, my Wi-Fi connection becomes unusable slow. When I stop the playback and wait a few seconds I can use Wi-Fi again.
The Wi-Fi connection never breaks completely, I stay connected but I can't even send or receive e-mails.
I'm affected by this bug on an HP Folio 13-2000 notebook with an Intel Corporation Centrino Wireless-N 1030 [Rainbow Peak] [8086:008b] adapter. Since I can't reproduce it with another notebook using the same WLAN and the same bluetooth speakers I guess it's hardware related.
I am affected by this bug on Debian Jessie (kernel v3.16): https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=777759
Since I wanted to know if it's an upstream bug I tested this with vanilla kernel 3.19 now. Please tell me if I can provide any more useful information.
Created attachment 166611 [details]
please try to disable bt_coex:
module parameter bt_coex_active=0 to iwlwifil
Thanks! It seems to help to disable bt_coex but I'll test this for some days and get back to you then.
OK, I don't need to test this for several days – it just works. I created a file /etc/modprobe.d/iwlwifi.conf with the following content:
options iwlwifi bt_coex_active=0
Since I did that and rebootet I can't reproduce this bug anymore.
BTW, this option has an unexpected side effect: It seems to have a very positiv effect on another bluetooth issue I first reported against pulseaudio and which was reassigned to bluez, see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=776632
How should I proceed in this case? Sould I file another (vanilla) kernel bug report?
This bug was closed 'documented' – I guess this means that option bt_coex_active is documented somewhere .
I don't write bug reports because I want to find a solution that works _for me_ (for that purpose I'd use a forum or a mailing list). As ordinary user I'd expect my Wi-Fi adapter to just work, even if I dare to use bluetooth speakers for audio output. So I'll reopen this bug.
 Where? I couldn't find any useful information about the module option at the "main source of Documentation for the Linux wireless (IEEE-802.11) subsystem" (https://wireless.wiki.kernel.org/).
Now it is:
Thanks for adding the info about module option bt_coex_active to the official Linux Wireless wiki.
I'm sorry for beeing a pain in the neck, but why would you close this bug report? I really just don't understand this decision.
because there's no way I can find the time to actually fix that.
I see, thanks!