836516 - Noise heard over BT headset while connected to WiFi AP and on call

Status: VERIFIED FIXED

(Firefox OS Graveyard :: General, defect)

Description

[Greg Grisco]

1. Turn Wifi off
2. Pair and connect to BT headset
3. Make a call to the test device and receive it on headset
4. Turn on Wifi and connect to nearby AP

result:  Noise is heard in the BT headset as soon as the wifi connection is made.

Comment 1

[Greg Grisco]

Attachment: Patch to start/stop abtfil process which allows WLAN firmware to be aware of BT operations

when bluetooth is turned on, we want to see this process running:

root@android:/system/etc # ps abtfilt                                          
USER     PID   PPID  VSIZE  RSS     WCHAN    PC         NAME
bluetooth 620   614   6016   996   ffffffff 4007eeb4 S /system/bin/abtfilt

Comment 2

[Greg Grisco]

Attachment: Patch to start/stop abtfil process which allows WLAN firmware to be aware of BT operations

Comment 3

[Joe Cheng [:jcheng] (please needinfo)]

(In reply to ggrisco from comment #0)
> 1. Turn Wifi off
> 2. Pair and connect to BT headset
> 3. Make a call to the test device and receive it on headset
> 4. Turn on Wifi and connect to nearby AP
> 
> result:  Noise is heard in the BT headset as soon as the wifi connection is
> made.

from my experience, usually this kind of issue end up being RF performance issue or load balancing between BT/Wifi when the 2.4GHz antenna is shared between BT/Wifi. is this really something that Mozilla can fix?

Comment 4

[Eric Chou [:ericchou] [:echou]]

(In reply to Joe Cheng [:jcheng] from comment #3)
> (In reply to ggrisco from comment #0)
> > 1. Turn Wifi off
> > 2. Pair and connect to BT headset
> > 3. Make a call to the test device and receive it on headset
> > 4. Turn on Wifi and connect to nearby AP
> > 
> > result:  Noise is heard in the BT headset as soon as the wifi connection is
> > made.
> 
> from my experience, usually this kind of issue end up being RF performance
> issue or load balancing between BT/Wifi when the 2.4GHz antenna is shared
> between BT/Wifi. is this really something that Mozilla can fix?

Agree. I don't think we could do anything in Gecko/Gaia to fix this problem. Adjusting parameters of BT/WIFI chip may help.

Even if using my HTC Sensation XL to connect with Jabra Wave, I heard some noise as well. 

Nominate as tef? again based on the reason above.

Comment 5

[Shawn Huang [:shawnjohnjr][:shuang] (as a happy gecko contributor)]

This related to Wifi/Bluetooth co-existence topic, and moreover, it can be probably improved from WCN chipset firmware. What Greg mentioned is to write property and make WLAN firmware understand Bluetooth is on, and co-existence mechanism will be enabled.

Comment 6

[Andrew Overholt [:overholt]]

Can someone from CAF comment on comments 3, 4, and 5?

Comment 7

[Michael Vines [:m1] [:evilmachines]]

We need this patch in Gecko.  tef+

Comment 8

[Eric Chou [:ericchou] [:echou]]

(In reply to Michael Vines [:m1] [:evilmachines] from comment #7)
> We need this patch in Gecko.  tef+

This patch is platform-dependent. To solve the noise problem, we'll land this patch with clear comment which describes that we need to provide a more clear mechanism for partners to sense the toggling of Bluetooth.

Comment 9

[Eric Chou [:ericchou] [:echou]]

Attachment: patch 1: v1: Set a system property for WIFI firmware knowing Bluetooth toggling

Hi Greg,

Since you did not request a review, I slightly modified your patch and am going to ask Gina for review. If you would like to use your patch or have any problems, please feel free to let me know.

Thank you.

Eric

Comment 10

[Gina Yeh [:gyeh] [:ginayeh]]

Comment on attachment 710024 [details] [diff] [review]
patch 1: v1: Set a system property for WIFI firmware knowing Bluetooth toggling

This patch may have conflict with b2g-18 since BLUETOOTH_DEBUGGINS_SETTING is not defined in b2g-18. Please make sure the patch won't burn the tree :)

Comment 11

[Greg Grisco]

(In reply to Eric Chou [:ericchou] [:echou] from comment #9)
> Created attachment 710024 [details] [diff] [review]
> patch 1: v1: Set a system property for WIFI firmware knowing Bluetooth
> toggling
> 
> Hi Greg,
> 
> Since you did not request a review, I slightly modified your patch and am
> going to ask Gina for review. If you would like to use your patch or have
> any problems, please feel free to let me know.
> 
> Thank you.
> 
> Eric

Hi Eric,

I'm not planning to use my patch, so please modify in the way that you see fit in order to fix this issue.  Thanks!

-Greg

Comment 12

[Eric Chou [:ericchou] [:echou]]

try:

https://tbpl.mozilla.org/?tree=Try&rev=45ec95eacb95

Comment 13

[Eric Chou [:ericchou] [:echou]]

https://hg.mozilla.org/integration/mozilla-inbound/rev/b38907697abf

Comment 14

[Ed Morley [:emorley]]

https://hg.mozilla.org/mozilla-central/rev/b38907697abf

Comment 15

[Ryan VanderMeulen [:RyanVM]]

https://hg.mozilla.org/releases/mozilla-b2g18/rev/d8197c05d32f
https://hg.mozilla.org/releases/mozilla-b2g18_v1_0_0/rev/04119110003d

Comment 16

[Deepa Subramanian]

Issue does not occur on bluetooth test devices Jabra(SP 200) and Rocketfish (Model RF-QX4). Seems to be fixed.

Verified  on Unagi Build ID: 201302019070200
Kernel: Dec 5
Gecko:  http://hg.mozilla.org/releases/mozilla-b2g18_v1_0_1/rev/98354c0298ab
Gaia:   edaca00b1eb7534120b6255db5d5200fb1d86d65