Database Users

Universal's A2DP Quality

Hi,
maybe someone can give me some info.
Have a T-Mobile Germany MDA Pro with the newest Stock ROM supporting A2DP.
Have board a brand new Plantronics Pulsar 590A Headset. It works, but the quality of the sound is very very bad with my Universal. I have also tryed the smal A2DP Sender, that comes packed with the Plantronics device and the quality is 100 times better. What is the problem? Can I adjust the bitrate of A2DP transfer in wm 5.0 registry?
The sound is a little much deep and on mid to hig frequencies, i hear a high frequencie noise.
Does anyone else has this problem?
This is not a problem of the receiving device.
Thanks for any help on this :`)

No Ideas?
Please Help!

I have the Qtek WWE ROM on my Qtek (latest official version). I use a Jabra bt620s, and i have no problems with it.
Maybe it's some obstruction of the signal? Do you encounter the problem when the Qtek is in clear view of the headset at a meter away?

I have the Motorola HT820, and finally got round to installing the Qtek WWE ROM today. Connects fine, I can walk into another room from the Uni and have no problems; But -
I also get a high pitched noise, particularly on music with lots of treble. It can be controlled up to a point by tweaking the graphic equaliser, but it is still annoying.
When using the HT820s linked to my Bluetooth PC and laptop, they sound superb - so it is a problem with the universal.

Thanks so far, i start hating my Universal ....
I think, there can be 3 reasons for that.
The Windows Mobile A2DP Software encoder, if it is software encoded.
The Bluetooth Chip, if it is HW encoded in Bluetooth.
The Radio ROM or Chip, if it is encoded on the Radio Processor.
I am not so deep in the Universal Technologie, but i know, that the sound was very clear on Blue Angel using the broadcom stack. So I think, it is M$ Bluetooth that makes the problem, but i am not realy sure.

... or is there anyone how don't has this kind of problem?

Hi,
I personally have never had that problem (which I interperate as "some form of noise" when listening to music over A2DP) you guys mention here, neither with my Motorola HT820's or i-Tech BluePRO's.
Only problems I have had with A2DP and my Universal is;
1. Pause/Resume button not working always in Windows Media Player (works fine in latest version of PocketMusic though)
2. Not automatic reconnect of A2DP when I turn headset on (only prob with the i-Tech's, Motorola's seems to work fine)
3. Occational drop/loss of sound for a second or two (have this under control now, only an issue for me now, when there is to much obstructions between Universal and my i-Tech headset)

RonnyGydar said:
1. Pause/Resume button not working always in Windows Media Player (works fine in latest version of PocketMusic though)
Click to expand...
Click to collapse
I also have this Problem. Sometimes, i have to press, the button twice, sometimes i have to hold it. But the problem apears only, on resume.
RonnyGydar said:
2. Not automatic reconnect of A2DP when I turn headset on (only prob with the i-Tech's, Motorola's seems to work fine)
Click to expand...
Click to collapse
Yes, that's realy evil ... I also have that. Reconnecting of Handsfree works fine.
RonnyGydar said:
3. Occational drop/loss of sound for a second or two (have this under control now, only an issue for me now, when there is to much obstructions between Universal and my i-Tech headset)
Click to expand...
Click to collapse
This is a general Universal Problem. Maybe Radio Interference, maybe missing some CPU power.
The noisy and unclean sound can be a ROM Version Problem, if you don't have that. I have tryed also with a Linux Computer as A2DP SINK Client, and the sound is same bad.
That's my ROM Version Info:
ROM-Version: 1.30.113 GER
Radio-Version: 1.10.03
Protokoll-Version: 42.44.P8
ExtROM-Version: 1.30.223 GER
Windows Version is 5.1.195 (Build 14847.2.0.0)

EyeOfTheStorm said:
I also have this Problem. Sometimes, i have to press, the button twice, sometimes i have to hold it. But the problem apears only, on resume.
Click to expand...
Click to collapse
Try downloading the latest PocketMusic version (if free for 30 days I think...so you'll be in heaven for 30 days at least), there it works perfect. ...it was enough for me to "cough up" the money to buy it!
And yes it seems to be every second time, and then one has to press button on Universal/Media Player once...bloody irritating...when the Universal is in the bag or something.
EyeOfTheStorm said:
Yes, that's realy evil ... I also have that. Reconnecting of Handsfree works fine.
Click to expand...
Click to collapse
Yepp, I have exactly same behaviour (handsfree no prob, while A2DP needs manual reconnect with iTech's...but with the Motorola HT820's I belive it was automatic though)
EyeOfTheStorm said:
This is a general Universal Problem. Maybe Radio Interference, maybe missing some CPU power.
Click to expand...
Click to collapse
For me I am pretty sure it is pure radio problem now (have tested with an app called SuperTask, and A2DP takes approx 20% CPU, and my JasJar now used a total of 40-45% CPU when I listen to music over A2DP with PocketMusic). I only have this problem when I have the JasJar in my pant pockets, are in an area I know there is a lot of interference+have some obstructions. Except from that it is fine now.
You can see this post on my "socalled test" (it was just a simple test, but it seems to give a good indication at least) of A2DP's effect on CPU here;
http://forum.xda-developers.com/viewtopic.php?t=53717
You can see my (and some others) experiences with A2DP and some stuff we have tried to fix/handle it as good as possible;
http://forum.xda-developers.com/viewtopic.php?t=53431&sid=87c2c327d12afa647df4d8773a330ee2
EyeOfTheStorm said:
The noisy and unclean sound can be a ROM Version Problem, if you don't have that. I have tryed also with a Linux Computer as A2DP SINK Client, and the sound is same bad.
That's my ROM Version Info:
ROM-Version: 1.30.113 GER
Radio-Version: 1.10.03
Protokoll-Version: 42.44.P8
ExtROM-Version: 1.30.223 GER
Windows Version is 5.1.195 (Build 14847.2.0.0)
Click to expand...
Click to collapse
I have no clue...do you have a Universal (I would guess so from that you post it here )...if so the HW is identical...so then...yes it should be the SW/ROM...since you actually have tried with another "headset" (your Linux computer). But I am sorry, that I am not much of contribution...if nothing else...I agree with your logic here!
BTW my ROM version++ is stated in the A2DP-test post I linked to above (don't remember the numbers...but I have the "latest QTEK WWE" ROM).

Thanks for your comments.
Maybe it's the T-Mobile Germany ROM that is the Problem. Have allready called the technical support at T-Mobile, to help.
Maybe they are ignoring me, but i have tryed.

Universal's blue tooth signal terrible
Look I had many imate devices and bluetooth sets. The Universal has a very weak bluetooth signal even with normal bluetooths.
I have tried 3 or 4 different bluetooth headsets and they all give me a max of 3 meters. With the Jam and pda2k with the same headsets I used to get 10meters.
I gues this is the reall problem you are facing, the bluetooth reception is terrible on Universal, try being really close like 40CM away and if the sound is good you will know that it is only a reception issue from the universal.

I noted the 40 ~50 cm distance problem when I reviewed my nokia hs-12w a2dp headset about a month ago, it is very irritating. I think it is to do with where the BT chip is placed !!! it is between the keyboard and the battery, from what I could tell of the exploded diagram on this site !! meaning it is surrounded by metal !!! not good .
PS I never have problems connecting my hs12w headset for audio use, however if I take a phone call, after the call has ended I loose AVRCP

EyeOfTheStorm said:
The sound is a little much deep and on mid to hig frequencies, i hear a high frequencie noise.
Click to expand...
Click to collapse
How do you play sounds over bluetooth ?
I'm trying to understand the routes of analog and digital
sound data and how to control them.

cr2 said:
EyeOfTheStorm said:
The sound is a little much deep and on mid to hig frequencies, i hear a high frequencie noise.
Click to expand...
Click to collapse
How do you play sounds over bluetooth ?
I'm trying to understand the routes of analog and digital
sound data and how to control them.
Click to expand...
Click to collapse
Hi cr2,
yes I read about it in IRC Log. But what you like to do is, streaming sound direct to the bluetooth hardware. Universal hardware supports this feature. There are 2 Bluetooth Profiles implemented for, one is called "Handsfree" and one is calles "Headset" and ini Windows Mobile Registry you will find it if you look for "Audio Gateway". The registry values are also documented in the online MSDN Lib. I will post a link, later, if I find it.
What I am doing is A2DP, that means ... all stereo sound will be compressed in software and then send as datastream to the bluetooth device.
Have attached the A2DP specification. Under Linux there is a project calles "bluetooth-alsa", that supports A2DP and Handsfree. Look for it at sourceforge.net.

EyeOfTheStorm said:
all stereo sound will be compressed in software and then send as datastream to the bluetooth device.
Click to expand...
Click to collapse
There are several options here. It can be sent directly
on some phones, or (theoretically) through the phone,
or even redigitized from the analog (for mono).
Under Linux there is a project calles "bluetooth-alsa", that supports A2DP and Handsfree. Look for it at sourceforge.net.
Click to expand...
Click to collapse
Software is not a problem. We need to understand
what the hardware is doing.

Bluetooth turns off randomly by itself

Hi all,
I'm running original WM06 ITA on my x7500 and I'm experiencing this problem:
when I receive a call I can't answer with my BT headset because X7500 BT is turned off even if it was on, so that I have to activate it again. So the problem is that X7500 BT turns off by itself very often in a day. How can I solve this problem? Any fix available?
THX so much!

hi
i have the same problem. this thing happens 2-5 times a day to me. the wicked thing is that somtimes it works perfect 1 or 2 days and when you think no everything is fine 'pop' its there again. fact is that bluetooth simply disappears, the indicator on athena is still blinking blue and the commanager tells bt is on, but my bt-headset (and other devices) signals that the bt connection is gone, also other devices cant find the athena any longer. i have to disable/enable bt in the commanager to get the functionality of bt back. i was thinking about returning the device for repair, but fearing the discussion of not using the original rom (the one with the superugly optical improvements of the provider ). and because maby it's a rom problem. my config is:
htc rom 2.21.407.1 (07/18/07) with extrom:2.21.407.101.
3 bt-headsets 1. sony hbh-ds220, 2. moto s705 and moto ht-820. all 3 are working fine with my universal but having these problem with the athena.
madbird

Hi...so we have the same problem...
I have the original HTC ROM just restored on my device and I have the problem. I read about it somewhere, other people with same problem but I can't remember where...

yes we are not alone i found serval posts on the net for htc and other brands like these:
http://forums.wireless.att.com/cng/...thread.id=27495&view=by_date_ascending&page=1
http://www.howardforums.com/showthread.php?t=867111
but no solutions. the only meaningful thing was for wm5, there is a fix of the bluetooth stack by microsoft (http://support.microsoft.com/?scid=kb;en-us;913683&x=13&y=14) but i did not found one for wm6.
mad

Hi guys.
I'm sorry to say that I had, a long while ago, the same problem with my Universal, and after a whole lot of tweaking, tinkering, and kinky massaging, all that was left to do was to have the device replaced. It definitly was a hardware problem, alas... :-(

I've had mine almost 4 months, stock 7501 ROM, and no problem like that ever. I leave BT turned on all the time. Sounds like a hardware problem.

been there done that fixed that
hi all,
yes, until I found the coolest und most functional BT headset, the cheapy prior ones caused same faults, even to the point of a hard reset ... why, well
no help to be found, just the notion of thinking and knowing, that the cheapy hardware out there was casuing it, not the htc.
example, some devices go into a kind of sleep mode and disconnect if not used, then while the htc still thinks its connected, it gets no reply from your other BT device. Take many SW packages or HW devices on your PC even, unplug the network and u´ll see, even they have unforseen problems ...
have fun, try HW makers like HAMA or Samsung, they rarely disappoint.
ollli

Aaaahhhh, I'm not alone.
Same problem here, but ONLY afair with WM6 (I'm using WM6, T-Mobile Germany). I can't remember, that I had this problem with the original T-MOB WM5 ROM.
Regards
Andreas

ollli3d said:
hi all,
yes, until I found the coolest und most functional BT headset, the cheapy prior ones caused same faults, even to the point of a hard reset ... why, well
no help to be found, just the notion of thinking and knowing, that the cheapy hardware out there was casuing it, not the htc.
example, some devices go into a kind of sleep mode and disconnect if not used, then while the htc still thinks its connected, it gets no reply from your other BT device. Take many SW packages or HW devices on your PC even, unplug the network and u´ll see, even they have unforseen problems ...
have fun, try HW makers like HAMA or Samsung, they rarely disappoint.
ollli
Click to expand...
Click to collapse
hi
i dont know if you read the post's above, but if you do you will see that the pda is turning off the bt, so it dont matter if you use one of the 'fantastic products' of hama (yes i also read your other 2 'advertising' posts of your overall 3 for them ). or any cheap crap stuff from sony or motorola like i do.
anyhow to came back to the real problem, i called my provider today and after explaining the problem, they suprise me with a complete hasselfree swap of the device to a new one in the beginning of the next week. when i get the new device i will test it first with the rom that installed, and then switch to the htc rom again to see if the problem returns again, i post the results here.
bye mad

Yeah, I think they're probably aware there's something wrong with some bluetooth chips, both on the Athena and Universal....

hi,
with wm6,
i have tested a BT 1.1 headset (Conceptronics) and works fine, without problems.
also, i have tested 2 BT 1.2 headsets (LG Style-i and Supertooth Nano). In the 2 cases, i have your related problems.
in my opinion, wm6 has a problem with the headsets that implements the 1.2 protocol.
all the headsets works fine with wm5.
regards

I have same problem with HTC Advantage running WM6 with LG Style-i headset ...

With my LG Style-i it keeps disconecting but with my SE BT headset it works fine (PK 3.0 Dual ROM) so in my case the BT on the phone doesnot turmn itself off, just has problems connecting.
Someone sugested a diff radio ROM might fix it - if so, does anyone know which radio does not implement the 1.2 protocol?
I'm using 1.47.51.00

hi there
i'm using my replacement athena for nearly one week now, and had not a single 'shutdown' of bt, not with the se ds220 nor with the moto 705 headset. i use the official german tmobile wm6 roms and not the htc version i used on the replaced athena. so it is not totaly clear if the change of the device or of the rom is making the difference, all other software packages are installed again. it also seems that the system is more stable overall in my every day usage, but that might be only my personal feeling.
mad
*EDIT* one more thing i noticed now is that when a call came in the sound is now played in the bt headset. before the sound came out of the speakers of the athena, and the bt headset only play its standard ringtone. seems that now everything is the way it should be .

BigDede said:
I have same problem with HTC Advantage running WM6 with LG Style-i headset ...
Click to expand...
Click to collapse
hi,
i' sure that the bt problem is due to the radio rom. i have the 1.38 radio rom and no problems with lg style. please, install it and test and report the results.
regards

bartito said:
hi,
i' sure that the bt problem is due to the radio rom. i have the 1.38 radio rom and no problems with lg style. please, install it and test and report the results.
regards
Click to expand...
Click to collapse
I have the 1.38 Radio version and I have the problem which is Bluetooth turning off by itself when using LG Style-i

ok, the problem is wm6
BigDede said:
I have the 1.38 Radio version and I have the problem which is Bluetooth turning off by itself when using LG Style-i
Click to expand...
Click to collapse

Did somebody tried to go through these update from Microsoft for WM6 ??
http://www.microsoft.com/downloads/...76-ff8d-460c-b454-6c487fd4c7d9&DisplayLang=en
http://www.microsoft.com/downloads/...c1-f0f4-4fd6-9366-b61e0ab59565&DisplayLang=en
http://www.microsoft.com/downloads/...5f-782b-4378-a228-f18af8c59aa3&DisplayLang=en

hi spiderman ,
i don't have teste (i have wm5) but the description seems don't have relation with bt stack procedures.
regards

Hardware or software
It's 4 months since last post and wondering if someone found a solution?

Getting the Dell BH200 BT to work w/ the Fuze

I just recently acquired a stereo bluetooth headset from dell model number BH200 and so far the stereo music quality is superb, but the moment a call comes in or I pick up a call it immediately disconnects itself. My question would be if any of you guys have any experience with this issue. the Stereo bluetooth and handsfree profile are both set to active. Any suggestions or hints?

I'm going to go on a limb here and assume that you guys haven't had access to the aforementioned bluetooth and i'm short out of luck here... right?
p.s. SAY IT AINT SO!!!!

Hi, I also have the same headphones and the same problem - only on HTC Universal flashed with WM6.
I search a bit on Google and it seems that the problem is with MS Bluetooth stack - it was working correctly for WM5 (but no A2DP), now in WM6 A2DP works, but handsfree does not.
Right now I'm testing alternative BT stacks - started with UniBT (it's Broadcomm stack modified for Universal) - now A2DP works flawlessly (before that, it didn't), but handsfree/headphones mode does not. At least trying to receive the phone call doesn't turn the headphones off.

i tested my fuze with a jabra bt2010 and it works fine. I'd prefer to not carry 2 bluetooth devices so i'm trying to find a way for it to work. I've been suggested to use a widcomm bluetooth stack as well but i dont know how to change my stack. If anyone here does know how to do it, please do enlighten us.

It's been nearly a month so I'm going to bump this thread in hopes of someone might possibly have some insight into this.

Push/bump.
I got the S9 now, it works for both functions but craps out completely when i'm outside, really bad signal reception as well as "muffled sounds" according to my audiophilic and audiophobic friends.
I think it has to be something to do with the actual firmware inside the bh200 that is wreaking some unknown havoc.

Dell bluetooth headset BH200 not working with Sony Xperia X1i
I have a Dell Bluetooth headset model BH200 and in A2DP mode, works flawless but the moment it is used with handsfree mode for call, the connection is broken and the headset switches off itself. This headset works very well with other non WM6.1 devices. Any clues with anony one what should be done in this case, some people have suggested JETware Hands-free Extension , any one tried on this.

I actually gave up on the bh200 and got myself a jabra bt8010. it works like a charm and the sound is just as good as the bh200

Indeed... i used to have a WM device (Mio A501) and I had the WM6.1 Pro..
I bought this BT at that time and it didn't work on WM6.1 (it even didn't asked me the PIN to pair it) but, when I tried with WM5.0, everything worked great, great sound on call's music, etc.. now I have a Sapphire and I'm not able to make calls on it (music works), but since I'm not driving and people used to look like "what a crazy guy speaking in English alone, no cables, it must be a mp3 or something.. hmmm" when I was on a call, it doesn't make a huge difference

i have yet to try this on wm6.5 but I highly doubt there would be a change..i'll give an update when I do charge up the bh200

i charged the bh200 up completely and tested it out.. it was a failure.. looks like 6.5 did not do anything to help...
Maybe windows mobile 7 will work.......... maybe.

You can use BH200 on call by this way only(I tested)
1. Turn on BT
2. Accepted call(However just Turn on your BT after accept call is OK)
3. Turn on BH200
4. Pair ur PDA w/ BH200
5. Done

IS this thead still active? I have a solution
Guys..
Use Reg edit and make the following modifications in your WM device by creating a new DWORD value 0 with the parameter UseESCO. Check out the path
HKLM\SOFTWARE\Microsoft\Bluetooth\AudioGateway\UseESCO = DWORD:0 (Dont use space between UseESCO)
Then restart the phone and delete any previous BT devices on your phone, start up the paining process and get it to work.
worked flawlessly on my Dell BH200
Thanks,
Raj.

seriously????
the fix is in one freaking registry tweak????
I'll have to wait 2 months before i can test this since i left the damn thing to rot in the US while i'm here in thailand..-_-

mputtr said:
seriously????
the fix is in one freaking registry tweak????
I'll have to wait 2 months before i can test this since i left the damn thing to rot in the US while i'm here in thailand..-_-
Click to expand...
Click to collapse
Of course Bro. I waited for 6 months myself too.. and finally found it in a microsoft forum.. well at last got it to work and my 200 sounds better than ever with its new functionality..
All the best
Raj

sweet! thanks a bunch man!

prudviraj said:
Of course Bro. I waited for 6 months myself too.. and finally found it in a microsoft forum.. well at last got it to work and my 200 sounds better than ever with its new functionality..
All the best
Raj
Click to expand...
Click to collapse
Heya, Finally got back ot he US and tested out the BH200 with the fix you mentioned. it works!!!!!
although, i'm wondering if you're having problems with the bh200 not wanting to connect to the phone automatically.

Need help for the same problem in android
I am having similar issues on my Nexus one. Dell BH200 works for music playback but stops functioning when a call is made or received. Even the connection between the phone & BH200 gets lost.
I would be really glad to get some help on this.

Bluetooth still doesn't work properly!

My X1 has a very annoying problem with it's Bluetooth. During a call using Bluetooth handsfree the phone will drop the Bluetooth connection, leaving the call connected so annoyingly the caller can hear me cursing the unreliability of my phone. I then have to finish the conversation holding the phone to my ear without the headset.
I called Sony Ericsson, who told me to update the firmware. I did - to R2AA007 - makes no difference. They then said it was a defective phone, so I got a new one sent to me...
...this one has worked great for a month, but yesterday the battery ran almost flat and whilst on a call using handsfree it started playing up again. Now it does it all the time again, even though the phone has been fully recharged and rebooted.
I have been very careful not to change any settings with this second phone, no installs of anything. This is a Vodafone UK phone if it makes any difference. Any idea how I can get this working again? Even without the handsfree connected I can see the display flash 'Bluetooth on' at random intervals indicating that it keeps dropping. Sony Ericsson say that this is not a firmware issue that needs fixing now - what do you guys think?

there are many posts regarding your problem. one thing is for sure,you are not the only one. look here http://forum.xda-developers.com/showthread.php?t=480698 and here http://forum.xda-developers.com/showthread.php?t=471181 here too http://forum.xda-developers.com/showthread.php?t=448703 i have my mbw-150 and my hbh-pv712 connected at all times to my x1 the watch is always connected but my headset disconnects randomly as you mentioned even during a call. there is no problem with your phone it's a software issue.

Thanks for the links. What annoys me is that Sony tell me there is no problem and they won't report the bug to their firmware team because "it's been fixed in R2A". This isn't the case, and it doesn't give me much hope for firmware R3A.

Same problem here
I experienced the same problem. Got my X1 in december 2008. Problems started in mid Januari, about a month of good Bluetooth operations, it started to give problems. During a call the Bluetooth connnection is lost, but the call stays open. Can reconnect Bluetooth again during the call, but after some time (sometimes seconds, sometimes tens of seconds) the connection get lost again.
Was glad when the new firmware arrived in Feb 2009. Download it, and the problem was gone fore about one month. Mid march the problem started again. Downloaded (the same) firmeware version again and the problem was gone again for some time. Last week it reappeared again
My conclusion: the Bluetooth bug wasn't corrected in the latest firmware version. Just reinstallation of a new firmeware version resets the phone and the the problem is gone then for some time.....
Seems that there some kind of an internal timer/counter that corrupts good bluetooth operations. I don't want to reinstall "firmware" every time again because I have to reconfigure my phone then every time, which takes a lot of time.
I hope that Sony finally will correct this most irritation bug!!!!
In the mean time I use a Bluetooth restart programme that "turns on" bluetooth every second. This helps moth of the time.

This works for me
In the Bluetooth-Device-Manager tap and hold the stylus on the headset you want to use until a popup is shown, then select use as headset. This worked for me when i have had some problems with one of my headsets supporting more than the "Handsfree-Profile" .
=> better connection under R1, best connection under R2(using R2 since official release)
Good luck WOODY

Hey Guys,
I think i have the solution for the bluetooth problem. i had my Xperia since 11/2008.
i never had a problem with connection when i used my headset. the problem was with the I-Drive disconnection randomly.
I flashed multiple roms from Itje and Jack with the same problem always.
now for the past 2 weeks i have been using Itje V5.5 with no problems what so ever.
the key is to turn bluetooth off in the comm manager everytime you wanna install new programs. i truly believe that installing software with the bluetooth on disrupt something ???
Hope that helps.

mdshahed said:
the key is to turn bluetooth off in the comm manager everytime you wanna install new programs. i truly believe that installing software with the bluetooth on disrupt something ???
Click to expand...
Click to collapse
Honestly, it make no sense to me....

try it!! it will work ...

@mdshaded
I hope youre kidding, I've had BT problem (BT turns off) since I got this phone last year.
With Itje's WM6.5 RC1 I still have the same problem.

I am not Kidding, I tried all cooked and original roms. I had a pocket PC phone for the past 3 years: Trinity, Kaiser and now the Xperia.
Again my dropped BT Connection were with my Car BT system, never with my Stereo BT headset.
try to hard reset and then install Itje V5.5 and keep your BT off until you are done installing all your programs then turn it on and report back.
Cheers

mdshahed said:
I am not Kidding, I tried all cooked and original roms. I had a pocket PC phone for the past 3 years: Trinity, Kaiser and now the Xperia.
Again my dropped BT Connection were with my Car BT system, never with my Stereo BT headset.
try to hard reset and then install Itje V5.5 and keep your BT off until you are done installing all your programs then turn it on and report back.
Cheers
Click to expand...
Click to collapse
I had tried more phones (Eten M600, Asus P525, Kaiser, X1), and did a lot researchs and only HTC's one (Kaiser, X1, Diamond, TP, HD ...etc) gives such issue. Not on my Asus P525 and M600. And I had tried many A2DP devices (Sony: DS-205, DS225, DS970, DS980, Clip-D Radio, Jarba (forget what model), JVC-BT1 (car system)) and only HTC devices give me issue.
And your suggestion of turn off bluetooth while software installation make no sense as installation only perform files coping + registry registration which I don't see any relationship from BT issue.

Dear Jack,
I know it does'nt make any sense. but i had this problem on other devices and was always corrected with a cooked rom except with the Xperia..
there is nothing to lose.. just try it..
my phone had no single dropped connection for 2 weeks now.
All the Best.

what bluetooth issue, ive been using hbh ds-200 since ive got the xperia (used on buses, around the house and alot of places) works great and has a further distance than p1i but only has an issue of button compatability. i think it could be the the bluetooth device ur using or the lack of software. may be wrong completley but hear me out ive had it rnning for ages with music on or durig a phone call cause i cant be bothered to pull out of its case to avoid scratching the phone (i know its stupid) but like i said it is working, for me atleast

same problem ...
I'm experiencing the same problem:
my X1 periodically drops the connection to my BMW iDrive while I'm speaking. But, when I'm not in the car I'm using a plantronics voyager 855 and never had a problem ! So there seems to be a problem with specific bluetooth devices.
Before the X1 I had a touch diamond and it worked without any problems with the same iDrive.
Thomas

Dear Thomas,
i am glad that you mentioned your problem with the I-Drive. I did not have a single drop in BT Connection for 2 weeks now. I truly believe that installing some software impairs the BT connection with my I-Drive.
Again never had any problems with Headsets.
My I-Drive Version I believe was newer than V.25.
Cheers.

Bluetooth AD2P & Carkit connection

There are a lot of problems with carkit connections & the HD2.
I tried several things to get it working without success.
When I try to connect to the JVC KD-AVX44 it connects but give no sound at all. (making 2 connections, handsfree & stereo audio)
Then I tried the registry tweak mentioned into this forum and had success once. I was very happy because also the title track was shown onto the JVC display and also the phone was functioning ok both ways.
The sound trough AD2P was perfect. Only one time.
After that i get a lot of disconnects.
Then I tried to make only connection with the phone function and this is working ok now. When I want to make the connection trough AD2P then the problem is back. Also when you make it without making the phone connection
So I think the problem lies into the stereo connection. For instance when you skip a track onto the JVC then the connection will be lost and reconect again and giving 2 seconds of sound and then it's quiet again.
Also when to 2 connections exists the phone is blocked by incomming calls because it's thinking it's connected so the earpiece & mic are dead at that time. And also the radio.

Did you try the LineSpeed setting to 256 in the AV key of the Widcomm registry settings ?
Don't know if it could help in your case but it did for me, I don't have disconnects with my Sony headphones anymore and sound is better.

Bluetooth
Ok thx I will give it a try and post the results.

which registry tweak did you applied first, cause i too keep having issues...?

tweak
Change Registry setting:
HKEY_LOCAL_MACHINE\Software\Microsoft\Bluetooth\Sys
Add the DWORD setting COD=5374476
This makes devices see the HD2 as a 'Normal' phone

Do I have to add this line somewhere? I found the AV key into widcomm but the line was not there

valos said:
After that i get a lot of disconnects.
Click to expand...
Click to collapse
Try turning WiFi off on the phone, it makes a big difference on my IO Play system.

valos said:
Change Registry setting:
HKEY_LOCAL_MACHINE\Software\Microsoft\Bluetooth\Sys
Add the DWORD setting COD=5374476
This makes devices see the HD2 as a 'Normal' phone
Click to expand...
Click to collapse
Ok i make this in my BMW X5 and one of problems is solved - HD2 working correct when i am on call and power the car, but i have another problem - after 5 - 6 min on call Bluetooth connections is droped and i can't lisen nothing from Car or for Phone - i must to press Menu and switch off Hands free to continue conversation.

Ok but are you also making stereo connection. I only have the handsfree conected at this time and then the connection is stable. Only with the A2DP it goes wrong.

valos said:
Do I have to add this line somewhere? I found the AV key into widcomm but the line was not there
Click to expand...
Click to collapse
Yes, you have to add the key, sorry not have said that.

kmeta said:
Ok i make this in my BMW X5 and one of problems is solved - HD2 working correct when i am on call and power the car, but i have another problem - after 5 - 6 min on call Bluetooth connections is droped and i can't lisen nothing from Car or for Phone - i must to press Menu and switch off Hands free to continue conversation.
Click to expand...
Click to collapse
Strange, so far I didn't experience any disconnection.
I have conversations during more than 20 minutes daily and line quality is far better than with my Diamond, with no drops.
With the Diamond I had the BT stopping regularily on the phone, it was very annoying because I always discovered it when receiving a call and not being able to answer.
So far it didn't happen on the HD2, but it is really too soon to jump to any conclusion.
I don't use A2DP in the car as I didn't order the option, which I viewed as useless because the hard disk capacity of the iDrive is sufficient to hold a good collection, the audio quality and functionality is much better and I can still connect the phone to the USB plug as mass storage if I want to play or transfer something from it or any memory stick or external HD.
So maybe not having the A2DP profile active may help also.

I also not any problem with my old HTD HD and Cruize ... but with HD2 i have this issue.
Today i receive answer of my ticket from HTC: they offer me to contact with BMW and to ask them why they not support HD2 ... I think this is stupid becouse every new device must support old protocols and older devices.
Now the choice is to change Car or Phone ... sorry but HD2 not have any chance to survive.

kmeta said:
I also not any problem with my old HTD HD and Cruize ... but with HD2 i have this issue.
Today i receive answer of my ticket from HTC: they offer me to contact with BMW and to ask them why they not support HD2 ... I think this is stupid becouse every new device must support old protocols and older devices.
Now the choice is to change Car or Phone ... sorry but HD2 not have any chance to survive.
Click to expand...
Click to collapse
Yes how lousy is that
Got the same answer first, but they realised that BMW coudn't recall thousands of vehicles to do a BT upgrade just because HTC decided to adopt the crapy Widcomm BT stack.
So they say they are working on a fix, but given how many issues there are with this stack, they better switch back to the old MS stack instead.
To be clear, it is the Widcomm stack at fault here, not BMW. Every single phone not equipped with this stack, I could try on the BMW, worked flawlesly.
I hope they will recognise this officialy and not blame the others each time a customer opens a ticket about these flaws.
In the meantime, the registry hack works perfectly for handsfree profile, but it seems it doesn't fix everything when the A2DP profile is activated.

MacGyver4321 said:
Yes how lousy is that
Got the same answer first, but they realised that BMW coudn't recall thousands of vehicles to do a BT upgrade just because HTC decided to adopt the crapy Widcomm BT stack.
So they say they are working on a fix, but given how many issues there are with this stack, they better switch back to the old MS stack instead.
To be clear, it is the Widcomm stack at fault here, not BMW. Every single phone not equipped with this stack, I could try on the BMW, worked flawlesly.
I hope they will recognise this officialy and not blame the others each time a customer opens a ticket about these flaws.
In the meantime, the registry hack works perfectly for handsfree profile, but it seems it doesn't fix everything when the A2DP profile is activated.
Click to expand...
Click to collapse
After much playing around - I found a linespeed of 300 works best for the HD2. 256 still has questionable quality and 320 for some reason skips a lot. Reducing it to 300 seems to be a workable equilibrium!