yashsingh1/xdaforums huggingface dataset:
[MTCD Android Head Units General] ikerg:
It has occurred to several units from different manufacturers.

The wifi issue more related to bad antenna welding (or just no antenna - first px5 models didn't have external antenna)

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[MTCD Android Head Units General] droc.noles:
Trying to take a look at logcat in real time when the audio stutters today - could garbage collection be a concern? I'm seeing forms of this message show up, including 'Starting a blocking GC Explicit':

W/ActivityManager( 589): Spurious death for ProcessRecord{32acb4d 0:android:ui/1000}, curProc for 12136: null
I/art ( 2434): Waiting for a blocking GC NativeAlloc
I/art ( 2434): Starting a blocking GC NativeAlloc
W/CursorWrapperInner( 2434): Cursor finalized without prior close()
I/art ( 2434): Starting a blocking GC NativeAlloc
V/RenderScript( 2434): 0x557a6837f0 Launching thread(s), CPUs 8
W/ContextImpl( 1287): Calling a method in the system process without a qualified user: android.app.ContextImpl.sendBroadcast:763 android.content.ContextWrapper.sendBroadcast:396 android.microntek.canbus.a.aa.b:-1 android.microntek.canbus.CanBusServer.od:-1 android.microntek.canbus.CanBusServer.ny:-1
V/RenderScript( 2434): User-backed allocation failed stride requirement, falling back to separate allocation
I/art ( 2434): Starting a blocking GC NativeAlloc
I/art ( 2434): Starting a blocking GC NativeAlloc
V/RenderScript( 2434): User-backed allocation failed stride requirement, falling back to separate allocation
I/art ( 2434): Starting a blocking GC NativeAlloc
I/art ( 2434): Starting a blocking GC NativeAlloc

Also, as listed in the middle of the dump above, this line repeats itself over and over in logcat:

W/ContextImpl( 1287): Calling a method in the system process without a qualified user: android.app.ContextImpl.sendBroadcast:763 android.content.ContextWrapper.sendBroadcast:396 android.microntek.canbus.a.aa.b:-1 android.microntek.canbus.CanBusServer.od:-1 android.microntek.canbus.CanBusServer.ny:-1

Something to do with canbus, obviously.

Interestingly, these background sweeps do not seem to induce any skipping:

I/art ( 589): Background partial concurrent mark sweep GC freed 10670(788KB) AllocSpace objects, 13(1508KB) LOS objects, 33% free, 13MB/20MB, paused 1.949ms total 109.411ms

There are several java related errors that pop up behind the more flagrant GC Explicit messages - these seem to be when the skipping is at it's worst (not just a quick dropout, but full fledged, rapid fire skipping for max 2 seconds).

The previously mentioned Vsync timeouts / Choreographer skipped frames seem to only crop up when opening Google Maps:

E/VsyncReciver( 250): timeout [this=0xab10d520]15.767694 ms (63.420817 Hz), buffer[0].count = 382186 phase 15870

Do all of these messages appear to be UI related? I'm not sure where to go with this given that I've tried several launchers with similar outcomes.
[MTCD Android Head Units General] aarick:
My WiFi via hotspot from my phone have been prefect. Wifi from my home is not good, but I just remember i changed router and tested with my phone at same location as my car.. While slightly better.. It wasn't great either..

So I think my wifi is fine.
[MTCD Android Head Units General] Ga73:
​

Okay got brave last night and curiosity got the better of me so decided to open the xtrons head unit up... It's correct there is an internal and external antenna (the internal being a tiny piece of coaxial cable) but look at all what looks like glue around... Also the internal is only connected to one place when there's clearly another hole next to it that's never been used... I'm not great with electronics tbh but can anyone confirm this should be connected in two places not just soldered in one place? My idea is to get to maplin and see if I can get another external wifi connection and solder this to the internal placement... Then connecting this through the black dtv slot which is the same diameter so no cutting or drilling required...

Hopefully I could fix the poor wifi and everyone will benefit if they want to follow suit...

Any help or advice guys?

https://www.dropbox.com/s/btxcp0erxsyrzgi/20170325_105335.jpg?dl=0

https://www.dropbox.com/s/ydd2h6h7ft25zz0/20170325_105346.jpg?dl=0

https://www.dropbox.com/s/qkxcqg78w8hw308/20170325_105400.jpg?dl=0
[MTCD Android Head Units General] marchnz:
Thanks for thr photos. Try cleaning up the solder flux or glue first carefully with isopropyl alcohol. If you have an old wifi with external antenna, you could use the antenna/feed as a donor and install in your unit.

The single wire is a very poor wifi antenna, note that the wifi chip is dual receiver / diversity.
[MTCD Android Head Units General] trap63:
Job done, I noticed this antenna failure this last night when I opened it to see if other USB ports were on mainboard. WiFi signal was good but with diversity restore (serious) is increasing, from good to excellent same network!

You need a SMA pigtail for board.

A bug surprise is that if you plug a GPS/GLONASS antenna it runs! (you see a screenshot of my dashboard on PB76HGTAP , Xtrons series for Toyota flat)
[MTCD Android Head Units General] ChromeSkull:
I take it that the wire you replaced is the bottom one in the picture and you left the top one alone?

Could always strip an SMA extension cable :) If thats all you did to improve things I'll contact my supplier and see if they'll authorise that work on my HeadUnit.

Always worth asking them if they'll honour the warranty after that repair.
[MTCD Android Head Units General] trap63:
I replaced the red single wire on positive marked side point with a coaxial one (the black you see) with SMA board pigtail soldered.

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[MTCD Android Head Units General] ChromeSkull:
I See thank you :D
[MTCD Android Head Units General] Z@ffy:
I was able to swap between warm boot and cold boot changing settings in Factory reset - > Other from "user profile 1" to "user profile 2". But with the last firmware nothing happens :(
[MTCD Android Head Units General] Aulus2001:
Hello,

had the same Problem with stuttering in background.

Deleted Version 1.0 and installed 1.1 from here but now DAB+ doesn't work anymore.

App starts and i can seek stations and get a list but then no sound and the app crashes.

Is it possible to get version 1.0 back?

I reseted the device because i thought the app will come back but no chance.

Updated the firmware but no more DAB+ app

Could you send me a working version?

Thanks

Aulus
[MTCD Android Head Units General] drukhadze:
try attached APK, taken from may Xtrons HU

Dab player is not schipping with system update
[MTCD Android Head Units General] maxego:
Hi Aulus,

I can not post links yet. I have sent you a PM with the 1.0 version of DAB + app.

Greeting

Max
[MTCD Android Head Units General] trap63:
For users who want to enable Developer Option (ordinary with 7 tap on build no.) 'cause on these unit are hidden (unexplainable choice...no comment) , install this one:

https://play.google.com/store/apps/details?id=com.singlebyte.devshortcut&hl=it

---------- Post added at 12:55 PM ---------- Previous post was at 12:43 PM ----------

FOR ALL USERS REPORTING ISSUE/TROUBLE with "DAB01" stick on PX5 with DAB player mentioned.

Common Wavesink Plus DAB+ FM-RDS and RTL2832U driver and a "rtl2832U stick" ($9.99) got no issue, Wavesink Plus DAB+ plays in foreground/background with no issue for sound in background about jumping and stuttering as occoured with DABplayer.apk ver. 1 or higher (Sophia version crash too).

Therefore is not an hardware unit issue or stick DAB01 (mine ran very well on 5.1 Lollipop), it's a software issue on PX5 Platform rooted or not. Same stick DAB01 operates as well on Mediatek Platform (Ownice C500 i.g.) with no issue. I know as I hold 2 HUs: Xtrons PX5 and Ownice C500
[MTCD Android Head Units General] aarick:
Same here for Audi A4 B7. Their mould is not correct. Same issue with my original MTCD unit. I had to sand it down.
[MTCD Android Head Units General] aarick:
Have to send my unit back because all my USB slots are dead. Worried I'll get a unit with bad wifi back as my wifi currently works fine.
[MTCD Android Head Units General] GantryZ:
How much of a pain is it to send these back to non-US sellers? I can buy the Xtrons TB706APL from Amazon but it ships from Hong Kong, so I'm not sure what the process would be like. Given all the WiFi and other hardware issues, want to be sure I'm not footing a huge bill to ship back or have to trudge it to DHL or something...
[MTCD Android Head Units General] ikerg:
Ask them to check wifi performance with your unit prior to send it back to you

if I did help you, please hit "thanks" button
[MTCD Android Head Units General] trap63:
buy it in UK Xtrons Shop, Euro warranty is granted.
[MTCD Android Head Units General] GantryZ:
$40 more from Xtrons direct for some reason, plus I'm in the US
[MTCD Android Head Units General] cellsafemode:
I have a 2015 lancer ralliart with rockford amp. Purchased the new px5 10.2 unit with android 6.0 from the ebay hotaudio-store along with the canbus adapter for 2014+ vehicles.

I setup the unit like shown in various youtube videos. https://youtu.be/v5B9q_Hf8dU

I still do not get any audio. I'm going to flash the firmware update shown in the first post of the dasaita thread and try again but am I missing some step here or configuration?

Everything is plugged in that can be plugged in (no wires were soldered or spliced either). I did not disconnect the battery during installation because all the videos i saw did not do that either, btw.

Anyone have success with a 2015 lancer with rockford amp? I dont believe i've seen any examples on youtube of someone getting this unit on a 2015 rockford system.

EDIT: updated unit with latest dasaita firmware and mcu files. Still no audio. This is the can-bus unit that the hotaudio-store seller sent me. It seems right... steering wheel controls are detected and work and everything else about the unit seems to work but I dont get any audio.

[IMG="canbus"]http://i.imgur.com/HgTdqkY.jpg[/IMG]
[MTCD Android Head Units General] semaj4712:
Is the audio glitches consistent between all apps and listening scenarios? I notice audio glitches only when google maps is telling me directions. Just curious what apps you are using and when you hear the glitches. In your case it easily could be hardware based if it is consistent.
[MTCD Android Head Units General] droc.noles:
It doesn't seem to be consistent in that these glitches seem to crop up the most when the unit is switching between apps / downloading something, etc. If I disable WiFi, kill running apps, I can get away with longer stretches of unblemished audio playback. And again, the radio is completely immune to this problem. I should probably test Bluetooth audio as well just for comparison.

Certainly not ruling out hardware, for sure. It just seems like the pattern lends itself to be something that is correctable in software. We've had enough people chiming in to indicate that they are experiencing the same to at least consider, although on the flip side, several aren't seeing even small dropouts.
[MTCD Android Head Units General] dongali:
I've been tracking your posts for this problem and the audio cracking seems to be a CPU throttling issue- you may ultimately need to install a CPU fan to fix it. I recommend you do this following to diagnose if the problem is CPU related:

1. Root it and run "SetCPU" to keep CPU at higher clocks.

2. Download an app off the playstore to monitor CPU temperature.
[MTCD Android Head Units General] droc.noles:
In truth, I should have already tried this per a previous recommendation, so I went ahead and purchased SetCPU. Initial results included a couple of individual pops, but no sustained, 2 second, rapid fire type of glitching. I initially set the CPU to min & max of 1.2 GHz, but I'm a little wary of temps as I try to push the unit. I'm seeing around 120 degrees F under little to no load, 140ish when pushing the unit a bit (Speedtest.net). Interesting to note how quickly temps increase when WiFi is highly active.

I'll have to report back if I see sustained burst glitching, enough for one evening. Thanks for the suggestion - same to you as well ChromeSkull, as you were the one to initially suggest this.

Edit:

http://freaktab.com/forum/tv-player-support/rk3688-devices-aa/beelink-rk3368/535190-occasional-global-stuttering

Related?
[MTCD Android Head Units General] semaj4712:
Noticed a new issue on my unit tonight. The torque app is not responsive, it will open, but I cannot click on anything in the app. Anybody else experiencing the same issues?
[MTCD Android Head Units General] wolfymozart:
KGL MCU v2.47 attached

Tested and working.

Thanks to [MENTION=898392]samadhi23[/MENTION]

[MENTION=2370138]aarick[/MENTION], can you link it in #2, please?

Thank you
[MTCD Android Head Units General] kovlaszlo:
My app notifies me that it is changing the volume, and I can also select which channels it should change (phone, system, multimedia, ring, alarm) but none of these has real effect on the volume. All in all, I have the feeling that PX5 is using different channel(s) than any other devices.

Actually what we are looking for is not something extreme complicate. A handful of apps exist which lets you automatize tasks on your Android device, we need one app which 1: can use GPS speed as trigger, and 2: can modify the audio channel that PX5 uses.

TLDR part:

On my phone I use the app called "Trigger", but it is a very simple one (that is the reason why I preferred it). As it is simple, it cannot use speed as trigger action. After checking now many others, looking for this feature, this seems to be the biggest hindrance. The very-very nice "Automate" app has the same lack, as ell as "Macrodroid", which is also nice and was already mentioned in this thread.

Tasker may be sophisticated enough, because it has a variable for speed. The problem in this case would be, that our correct trigger is not the speed itself, but the current speed and the previous speed. Like this, e.g.: IF the current speed is 80 AND the previous speed is 81 THEN reduce the volume by 1. This may seem to be simple, but from programming point of view it is not very simple, I am sure. Honestly, coding this into a tasker module, is not something that I was dreaming about. I like playing with these stuff, but I am not a programmer.

I have also checked Xposed modules, but I found no solution for our problem. Maybe “Xposed edge pro” (thanks to ZeligPC LINK ) could help us, but the triggers are not listed anywhere.

I have found only one app, which fulfils both of the two criteria, and seems to be very promising. Not a free app, though:

Very clever speed trigger, it worth reading the "Settings" section below the short summary: LINK

Volume action with clever options as well: LINK
[MTCD Android Head Units General] bettuccio:
I've got a look. I'm also in possession of this application (automagic P ...) Unfortunately I'm not a developer and I can not make a trigger / condition for our PX5. I'm used to using the "tasker" application for simpler things. For me this is too complicated. It would be helpful for someone who knows this language well.
[MTCD Android Head Units General] th1000:
Had a disaster moment yesterday my xtrons PB96MTVAPL has played up the last couple of days with just a black screen. A quick battery terminal removal usually does the trick but I thought I would try the reset button only problem is I used a pen and it's cracked the screen! Now only the right hand touch works. Anyone know if they are easy to replace the screens? If I can get one that is
[MTCD Android Head Units General] xdamember2:
How are you measuring temperature? I tried several apps but they could not read it.
[MTCD Android Head Units General] droc.noles:
Had been meaning to report findings across the last two days, which includes referencing the above. What I was seeing before was just algorithm based temps reported by CPU Temperature, and thus not accurate, so back to the drawing board there. I, like you, have not found an app that is capable of directly monitoring this CPU's temp.

Have played around with SetCPU, and found that locking the CPU to 1.2 GHz has not solved the audio glitching problem. It can be argued that the unit seems to be a bit more stable, but I can't quantify that in any way, as ultimately, the unit still stutters from time to time, same as before. I've also seen that my unit has abruptly restarted itself once as well, and I've come out to start the car to find that the unit has not resumed itself as it normally does twice - in both cases, the unit restarted itself, so I'm back to square one. Not sure if this behavior is related to locking the CPU to a certain frequency?

I've stayed away from any other monitoring tools given this sudden erratic response, and have reset the CPU to operate as normal (interactive, 216-1200 MHz).

Additionally, Dasaita / HA had mentioned via email two days ago that they have a new system update that they are testing, and should be released anytime as long as tests prove to be stable, so I'm looking forward to trying this ROM out upon release.
[MTCD Android Head Units General] droc.noles:
To follow up on my own post, just was out and about for a solid half hour ride without any glitching at all - not even one dropout, and I had Google Maps running just to try to induce the skipping.

Poweramp>auto buffer>audio thread highest priority. I have no idea why it worked perfectly this time in truth, as I had the same stuttering when I tried this app a few days ago as per usual, with the same settings at that. Weather here is still warm enough to assume that CPU throttling should have been in play per usual as well, provided that temperature is causing throttling to begin with.

All I can do is throw up my hands at this point, because I sure can't seem to find a pattern. Something that normally causes this issue wasn't in play on this particular trip.
[MTCD Android Head Units General] tomellada:
MCU Mercedes Sprinter

Hi. I'm looking for Mcu for Mercedes Sprinter unit.

I'm new one here,and I cant put links for my unit

Can someone help me?
[MTCD Android Head Units General] DropperGK:
Please could you tell me how to get in recovery mode correctly as my unit is the 800*480 but i have incorrectly update to the 1024*600 and every thing is big.. i cannot get it bake to 800*480 by doing through the normal Rom i need to do it through. but i do not know how to get into the recovery.

Many thanks
[MTCD Android Head Units General] careles:
hope it helps!

[YOUTUBE]LW0RGUyRZks[/YOUTUBE]
[MTCD Android Head Units General] DropperGK:
Thank you very much ... it did help to get into recovery mode ... but i cannot seem to get my unit back to 800*480 resolution. it keeps on saying mcu aborted and then goes back to the 1024*600 resolution.

i dont know how to fix this to get it back to 800*480 resolution.... otherwise HU is useless
[MTCD Android Head Units General] ikerg:
You need to know the manufacturer name:

Go to device info and check the characters for: MTCD_xxx

Then find the mcu published here in xda.

It seems that the headunit has a can-bus decoder....on factory settings you have to select the correct can-bus box for your Mercedes

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[MTCD Android Head Units General] tomellada:
My unit's model is

MTCD KGL v 2.36_5

I searched for, but I did not find...
[MTCD Android Head Units General] wobbletop:
Yes, "they" really need to update the first post to warn people with 800x480 resolution units. It seems most people have 1024x600, so it's not a problem for them.

My seller says he will be able to get me a new firmware this week that should solve the problem. My unit has exactly the same issue as yours. I'm not sure why it is taking them so long to send me the fix.

I'll let the forum know when I get the file, and if it fixes the issue.
[MTCD Android Head Units General] gsrcrxsi:
so i may have solved my BT/Wifi issue. the problem i was having was essentially that wifi speeds were becomming extremely slow when BT was also paired.

PX5 based unit. sold by Xtrons, TB706APL. (a 7" double din unit, but all of these units are very similar)

I decided to take my unit apart and solder in new antennas. pics i have seen online showed that there was the rear external wifi antenna and then usually just a piece of wire soldered in for the other antenna. and often times poor soldering

took my unit apart to find this:

only 1 antenna. no diversity at all. soldering looked ok though. so i decided to remove the antenna that was there and replace it with a beefier wire, as well as an identical antenna on the second port. with bigger antennas at the rear than what it came with.

speed tests now show no difference between Wifi speeds when BT is on or off. Still need to test more. but if anyone is brave enough and competent, might be a good solution if youre having this problem
[MTCD Android Head Units General] macandnews:
On my Erisin ES6046B, I have no speed problem when I use WiFi at the same time as Bluetooth.

On the other hand, it is far less widespread than the old ES4046.

At times, I have a problem connecting with Bluetooth and my iPhone 7.

It happens from time to time that my iPhone 7 no longer connects with the car radio. The only solution I found is to press the "Reset" button on the car radio.

I have the mcu 2.47-2 and firmware Erisin.
[MTCD Android Head Units General] Bose321:
Got mine today! Had to pay 50 bucks for customs, but my worst case scenario was worse! So It was 230 euro for me in total, not bad.

Installed it. Only thing I am struggling with is my FM reception. I've got an amplified signal, but it doesn't seem to work. It needs a 12v source, but both the ANT cables I found don't activate it. Is the FM signal just really really poor in the device, or did I miss something?

Device seems to turn on quick. Sygic navigation is pretty nice. GPS reception seems good. Interface is really different then what I am used to, but seems good.

Something else I noticed is some music was really choppy, especially with the visualizer on. Is this normal? The sound is good when it's hidden.

Is it possible to return to the home screen from a 3rd party app? I don't have the home icon on the top left in that case.

Last question for now, I noticed when I turn the car off, and on again, the unit is directly back on. Does it drain my battery, or is it in a deep sleep? Or will it not be that fast tomorrow for example when I turn it on?

I'll check the firmware tomorrow, interested in the version.
[MTCD Android Head Units General] droc.noles:
I'm assuming you're referencing intervals of stuttering in local music playback? If so, this is something I've been trying to figure out for some time. Of course, I've had the visualizer on in the stock music app from day one with my unit as I'd rather look at that on screen that just text / nothing - would be amazing to find out something this simple could be causing the problem. Are you finding that you're seeing glitching only with the visualizer engaged? Can you induce any stuttering / dropouts any other way, eg switching between a number of apps, especially those that use data?
[MTCD Android Head Units General] FauxDreams:
Don't get to excited the intermittent stutter isn't just on local playback, does it on spotify, pandora, soundcloud etc.
[MTCD Android Head Units General] Mattsch:
I struggled a lot with bad radio reception too, tried everything, including different "phantom" power supplies, but the only thing that solved it for me was to change the antenna/aeriel.

Now my signal is as good as before, and the dab+ works just as good as the fm signal.

This is the one i got works perfect https://www.amazon.de/Hama-Dachantenne-Digitalradio-elektronisch-Autoantenne/dp/B00LFHUWLY a big job to pull the cables through the car, but i installed a reversing cam the same time so had to take the car apart inside anyway

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