Comment 1 Simon Pickering 2009-10-29 00:56:31 UTC

I should add that I get not only the drop-outs, but pitch/speed changes in the
music that's playing (afaict it speeds up after a drop out).

Comment 2 Johan Hedberg 2009-10-29 01:16:44 UTC

This is a known issue and will be tried to be addressed in future Fremantle
releases. The source of the problem is the fact that WLAN and BT share the same
antenna and need to play nicely together because of it. There are several open
bugs about this in the internal bugzilla and several different ways that we can
make the situation better.

Comment 3 Andre Klapper 2009-10-29 18:59:52 UTC

So this is a duplicate of bug 3238?

Comment 4 Simon Pickering 2009-10-29 19:04:36 UTC

Perhaps, same apparent outcome, but different sw versions and machines (at
least was a different machine at the beginning of the last bug).

Would need comment from someone inside Nokia I think to decide if these are in
fact the same thing.

Comment 5 Johan Hedberg 2009-10-29 22:11:22 UTC

I don't think this is necessarily a duplicate. The other one is about Bluetooth
interfering with WLAN whereas this bug is about WLAN interfering with
Bluetooth. I think it's good to keep these separate since it's possible that
the two issues get fixed independently of each-other.

Could this be related to bug 5586?

(In reply to comment #6)
> Could this be related to bug 5586?
Most likely the same problem.

I reported this as bug 6411. My music speeds up or slows down. Here is the info
I submitted.

SOFTWARE VERSION:
(Settings > General > About product)
1.2099.42-11.


EXACT STEPS LEADING TO PROBLEM: 
(Explain in detail what you do (e.g. tap on OK) and what you see (e.g. message
Connection Failed appears))
1. Listening to audio (downloaded podcasts / mp3) on bluetooth connected Nokia
BH-905.
2. A sms text message, email or im is received.
3. 

EXPECTED OUTCOME:
Audio is paused for 1-5 seconds while message tones are played and messages are
received. Audio then continues.

ACTUAL OUTCOME:
Audio slows down / speeds intermittently while receiving messages. Sounds
similar to the effect received by holding down both play and stop buttons on a
cassette player (slowed down audio) or by holding fwd and play on a cassette
player (speed up audio). This lasts for about 10-15 seconds every time messages
are received and then stops.

REPRODUCIBILITY:
(always, less than 1/10, 5/10, 9/10)
Always

EXTRA SOFTWARE INSTALLED:


OTHER COMMENTS:

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.5)
Gecko/20091102 Firefox/3.5.5 (.NET CLR 3.5.30729)

*** Bug 6411 has been marked as a duplicate of this bug. ***

Comment 10 Andre Klapper 2009-11-30 15:00:04 UTC

*** Bug 6435 has been marked as a duplicate of this bug. ***

I'd also like to confirm this issue. A particular deadly combination is a2dp +
Internet radio through Wifi (I do this all the time on other handsets). While
it's buffering I get constant hiccups (I would never get this using the same
combo on S60 handsets). For the record, i'm using a set of LG HBS-250
Blutetooth stereo headphones

I can confirm this behaviour, but never knew what caused it. This is helpful to
know.

Now I need to test if this is causing my constant disconnections with a
headset/cars if wifi is enabled. Though, the disconnects from car makes no
sense other than I do have it searching every 10-mins?

Anyone know if I should file a separate bug for this or if this handles the
A2DP issue AND general disconnections (and there is static on calls over
headsets as well)?

Thanks.

I would like to confirm this bug. Bluetooth headset audio is very bad when
using wifi. Other side of phone calls complain of "static".

Skype is nearly impossible to to use with BT.

I have also found that the 'connected' status of the BT headset frequently
becsomes unstable. The status panel shows it as disconnected and the settings
only offers a 'disconnect' button which when clicked freezes the entire device
for 5-10min. (I am not sure if this is related.)  Only solution is to power
reset the device.

I have two different BT headsets and both have the same behavior.

Bug confirmed with my AD2P stereo headset B-Speech Calypso

Have confirmed this with my Nokia BH-905. With WIFI on, get intermittent
hiccup, every few seconds. Disable wireless from the Status popup, and works
nicely.

In the bus stop I turned I paired the bluetooth headphones. I then ran media
player and heard music on the way home.
as soon as I was near and the wifi signal was sensed , I began hearing chopped
audio in the headphones.
when I turned the headphones off , music passed to the speakers nicly (pulse
magic I guess)
Niv

Also when i press back on my bluetooth head set the list goes crazy and does
not find another song.

Everytime e-mail is downloaded (happens a couple of times per day for me) I get
a notice of this before the N900 tries to play a sound (and show the yellow
bubble on the screen), since the WLAN traffic chops up the A2DP traffic (music)
...

Listening to internet radio via wifi is particularly hard to enjoy this way :P

Headset: SonyEricsson HBH-DS980

I think this should have a severity higher than normal, because it actually
disrupts phone calls when using a bluetooth headset.  (It's not as high
bandwidth as A2DP so it doesn't get disrupted as much, but making a phone call
with SIP, for example, is extremely jittery)

It would be unfortunate if someone was making a 911 call and he couldn't hear
the operator because his phone started checking his e-mail and looking for app
updates.

I too would confirm this with BT headsets BH-103 and BH-604...

Same problems with Motorola HT820 headset, not fixed as of version
2.2009.51-1.002 update.

Glad I found this as I thought it was a fault with my headset.

At least I know now I should be fine as long as I turn off WiFi when I leave
the house.  Not ideal as one of the big selling points of the N900 was that it
automagically switches to WiFi when in range, but its a workable stop gap.

I just hope this can be fixed, its a pretty huge bug IMO and a shame it wasn't
fixed on 2.2009.51-1.  I mean surely Nokia knew having BT and WiFi on the same
antenna would cause these problems?  This should have been a priority knowing
the limitations of sharing the antenna.

Ok, with the new 2.2009.52 firmware things have somewhat been fixed. Using my
HBS-250 a2dp headphones I can now listed to internet radio while on wifi. My
music also no longer gets interrupted when Modest checks for email at every
interval that I've set it to.

To put it really to the test I began downloading a file in the web browser
while trying to listed to some music. Huge mistake. Bluetooth cuts alot while
the file is being downloaded and a2dp becomes unstable once more. I could
imagine the same thing happening then if someone were to be using a combination
of skype/SIP calling, WiFi, and a headset/a2dp headphones.

I'd say, for the light stuff (internet radio+a2dp) performance has certainly
improved. The problem hasn't been fixed though as heavy wifi traffic still
causes a2dp to become greatly unstable.

With 2.2009.51-1, it is still problematic when Wifi connection is lost (for
instance, when leaving my home), A2DP music stream (from mp3 stored on the
device) hiccups, speedup and slowdown for 2/3s.

Indeed, that was why I thought my headset was broken as it would seem to do it
all the time.  Because I am often using WiFi at home and it would happen as
soon as I left the house, because my WiFi signal would be coming and going so
the simple act of connecting/disconnecting caused havoc with my headset.

If I leave check for WiFi every 10 minutes on (which I would like to do) it
would happen in certain places on my walk too, which makes sense as its places
where I would expect other networks to show up, so it glitches while its seeing
if it can connect to them.

Has anyone tried to enable bluetooth coexistence mode?

echo 1 > /sys/devices/platform/wl12xx/bt_coex_mode

Comment #23 from Jesus Pulido   2010-01-15 07:59:00 GMT+3 [reply]

"I could imagine the same thing happening then if someone were to be using a
combination of skype/SIP calling, WiFi, and a headset/a2dp headphones."

Yesterday I installed the platform update 2.2009.51-1. Before that i had tried
to use WiFi+Skype+Bluetooth headset and it really worked.
Since the update /yesterday/ it hasn't been working at all. Skype + WiFi is
fine WiFi + Bluetooth is fine too. But not only can't you use talk via Skype
while your headset is connected, but it doesn't connect at all to your skype
account /it shows that it is connected but all your contacts are offline/.

Thank you

(In reply to comment #24)
> With 2.2009.51-1, it is still problematic when Wifi connection is lost (for
> instance, when leaving my home), A2DP music stream (from mp3 stored on the
> device) hiccups, speedup and slowdown for 2/3s.

I *believe* this is also true when changing AP (same SSID). My laptop used to
hop back and forth every 10 minutes, which is just about as often that my A2DP
stream hiccups nowadays with 2.2009.51-1 (I'm still not on PR-1.1).

this is still an issue for me with PR1.2.

anyone else?

Comment 30 Andre Klapper 2010-05-27 15:03:53 UTC

(In reply to comment #29)
> this is still an issue for me with PR1.2.
> anyone else?

That's why it's in NEW state and not in RESOLVED FIXED. :)
(But thanks for retesting)

Comment 31 Andre Klapper 2010-06-02 15:25:00 UTC

*** Bug 10272 has been marked as a duplicate of this bug. ***

Comment 32 Andre Klapper 2010-06-08 15:31:38 UTC

*** Bug 10604 has been marked as a duplicate of this bug. ***

As a potential workaround, I've found some success changing the channel of my
wireless router.  In my case, changing it as high as it would go (turning it up
to 11, so to speak :p) got me a great improvement in A2DP performance while I
was using wifi.

Still reproducible with PR1.3.