yashsingh1/xdaforums huggingface dataset:
[MTCD  Android Head Units Q&A] typos1:
Great, so I may have bricked my unit :(

Or maybe not - I used [MENTION=5092263]Hal9k_[/MENTION]'s image on page 3 first which had an N recovery.
[MTCD  Android Head Units Q&A] lamsquirrel:
What do you have? Can't flash 5.1 from recovery?
[MTCD  Android Head Units Q&A] typos1:
I had 5.1.1. on an MTCD RK3188/PX3 1 Gb RAM unit, I flashed [MENTION=5092263]Hal9k_[/MENTION]'s N (test) N ROM in post 3, then, as someone said there was an N ROM from a unit that was on sale a few pages back, I updated to that version, then I go LEDs working but a black screen.

I said earlier it had an N recovery, I should say it was a different recovery from what I ve seen before, maybe it was an updated L recovery. When the update to the 03.072017 version of N started there was a different update screen from what I ve seen on MTCB, MTCC and MTCD units before, no robot with a progress bar over it, but a grey screen with a white progress bar. Because I ve updated these units so many times I went off to do something, I guess I should have watched to see what happened.

Now, I cant see anything because of the black screen, so I dont know what recovery I have. I will try and update blind by turning the knob the appropriate number of times.
[MTCD  Android Head Units Q&A] lamsquirrel:
So you can't even enter recovery? I have issue with flashing rom, when I tried to return to 5.1 from 7.1.
[MTCD  Android Head Units Q&A] typos1:
Lol, I keep telling you - I CAN enter recovery, I can tell by the way the LEDs flash, but cos of the black screen I cant SEE the recovery at the moment !! :)

The issue I have is updating from one version of N to another.
[MTCD  Android Head Units Q&A] lamsquirrel:
sry, i just wonder how do you realize that you enter recovery with black screen.
[MTCD  Android Head Units Q&A] typos1:
Lol, for the 3rd time - I can tell by the flashing LEDs !! :)
[MTCD  Android Head Units Q&A] lamsquirrel:
I've got it, but mine flashes whenever it want lol.
[MTCD  Android Head Units Q&A] typos1:
Really ? Hmm, hope mine isnt doing that or I m not getting into recovery.
[MTCD  Android Head Units Q&A] zerozoneice:
nop, i can't find it online, and Bob @ witson claims they're not selling this model yet. I wrote him back dude i'm looking at it installed in my car now ffs :)

---------- Post added at 11:12 PM ---------- Previous post was at 11:11 PM ----------

didn't try either BT or Root yet.

---------- Post added at 11:15 PM ---------- Previous post was at 11:12 PM ----------

wonder what would stir the bigger ****storm nowadays: the N word or the L word :D :D
[MTCD  Android Head Units Q&A] zerozoneice:
short update on my MTCD_XRC, PX3 w/2GB RAM and Nougat 7.1.1.

rock solid so far, standby works fine, boots up in 1 second, FM radio reception awesome, operates very fast due to 2GB.

i don't see the need to root, update or customize it....yet :)

only complain so far is the cold (blue-ish tint) display temperature which can be somehow tweaked using apps like Twilight.

==============

Looks like i found a worthy replacement for my PX3 Joying 5.1.1 with modded AMP PA2030 (and 2x1GB BGAs but not soldered yet), so i'll put it up for sale soon. If anyone is interested, PM me.
[MTCD  Android Head Units Q&A] s.rahus:
Wow! Awesome to hear that buddy! I am waiting the delivery of my unit for my VW. Remember we had a discussion about the new amp IC and Radio IC on the other thread. That deep sleep thing, do you think that is an implementation at the MCU level or all the 7.1.1 unit will have it? If you manage to get the ROM from the seller you can probably share it with Hal9k.

Cheers,

Rahul U S
[MTCD  Android Head Units Q&A] zerozoneice:
no idea, but i suppose it's a combination of MCU and possibly a new PX3 revision board? MCU definitely since some users reported the option appeared after a MCU update. there is a 7.1.1 version from 03 July here in the forum, [MENTION=8406911]S@lman1996[/MENTION] had it posted, so [MENTION=5092263]Hal9k_[/MENTION] should have it already....
[MTCD  Android Head Units Q&A] typos1:
Hmm sounds like theres something wrong there.

Lol, I m not sure what the L word even is !

Yes, but it still has the text at the bottom, theres also a 05.07.2017 update as well, that also has the text at the bottom.

You seem to have the only version without the text at the bottom of the screen, pity you cant copy the ROM from your unit.
[MTCD  Android Head Units Q&A] zerozoneice:
darn, lucky me i guess....

if [MENTION=5092263]Hal9k_[/MENTION] or someone can walk me thru dumping the ROM, i'll gladly contribute to the hungry masses :)
[MTCD  Android Head Units Q&A] S@lman1996:
Typos,

1) how did you manage to recover ur bricked unit?

2) Explain the steps!

3) What version OS you have installed now?
[MTCD  Android Head Units Q&A] s.rahus:
Or may be Hal9k already has it and will surprise us with the modded ROM anytime!:silly:

Cheers,

Rahul U S
[MTCD  Android Head Units Q&A] typos1:
I ve been busy so not done it yet, I ll probably have to use SD firmware tool.
[MTCD  Android Head Units Q&A] Hal9k_:
It is not necessary.

All firmwares I've seen have the red text if they are installed on the Android board version 0.3.

On the new revision board, where the Android 7 was out of the box, the text will absent on the same firmware.
[MTCD  Android Head Units Q&A] typos1:
I think you may have missed something [MENTION=5092263]Hal9k_[/MENTION] - [MENTION=3342358]zerozoneice[/MENTION] has a brand new unit that came from the factory with RK3188/PX3, 2Gb RAM and N and he does not have the red text.

Also as far as I am aware rev.02 is MTCB/C and rev0.3 is MTCD and the 2Gb RAM rev0.3 MTCD boards with N simply have 2Gb RAM and N, apart from that they are the same . . . well, the only possible difference is the addition of HDMI out which you can see in the photo at the beginning of this thread.

EDIT: ah, I see what you meant - [MENTION=3342358]zerozoneice[/MENTION] has a later version of rev0.3 with HDMI (shall we call it rev0.4 ?) and youre saying that any version of N installed on the rev0.3 SoMs will show the red text.

Still, [MENTION=3342358]zerozoneice[/MENTION] is the only member with 2Gb RAM and N from the factory, so it would be worth getting his ROM and seeing if it works on rev0.3 SoMs I think.

And if you are right we will have to spend a long time looking through the firmware for how theyve implemented this stupid message !

[MENTION=3342358]zerozoneice[/MENTION] - do you have a visible HDMI out on your device ?
[MTCD  Android Head Units Q&A] zerozoneice:
not at the back of the unit, no. I'll check the board when i open the case...

i managed to get into recovery, the usual MTCD 10sec long press power, blinking buttons, wait 2-3 sec, press power once. Here's a shot:

well, i may have the exact N build some of you have, the only difference being the board HW revision. Once it reads in whatever HW UUID/GUID identifying the board, it displays the red text. Which makes sense in a way, since no official 7.1.x upgrades have been released yet for backwards compatible boards (PX3 or 5, even Sofia).
[MTCD  Android Head Units Q&A] zerozoneice:
...delete this
[MTCD  Android Head Units Q&A] typos1:
Thanks for the info. In an earlier post I said I had the N recovery, I was wrong it was L, but 5.1.4. or something.

I think its worth trying to get a ROM dump from your unit, if you dont mind - [MENTION=5092263]Hal9k_[/MENTION] may be right and we could get the red text, but also he may be wrong, its worth trying just to check.

Be interesting to see whats "under your hood" - I never could see the point of HDMI out (unless it proper dual zone for rear screens) but it seems strange to announce it and then sell units without it.

I m not sure I understand this bit - what hw revision is your board ? Where does it say ? Are you saying you get the red text sometimes or were you surmising about what maybe happening on other units to make them display the red text ?
[MTCD  Android Head Units Q&A] zerozoneice:
i'm saying the 7.1 builds in the wild (probably even including mine if I dump it), could show red text on every non-"v4" PX3 board.

maybe it has a detection string built-in to read in HW info and display "test version" in red, if it finds anything else than a v4 board...just a thought.

on mine i never saw a red text. maybe because it's a "production ready" combination of HW (new board rev.) and SW (N 7.1.1)

how can i read dmesg with least hassle? i'm sure i can find some HW rev. strings in there...without blowing the case open :)

on second thoughts...the fact that i have a fully working deep sleep/fast resume feature on this PX3 board (feature which until now it was only on Intel Sofia and PX5), may indicate definitely a new HW rev. board along with proper MCU SW. I mean this thing wakes up and is fully running in a second, it's awesome.

another way to test things would be for me to install salman's 7.1.2 ROM and see if i get a red message or not. But until i can get hold of my current factory ROM in flashable form for restore purposes, i'm not willing to take the risk :) By having the 7.1.x recovery i can theoretically jump between N builds with no issues, but as i said, i need to fall back onto something...
[MTCD  Android Head Units Q&A] typos1:
Right, yeah maybe, or maybe it looks for HMDI out and says that if it cant find it.

Seems strange though - when Klyde introduced Lollipop last year (the only MTCB/C manufacturer to do Lollipop) they also started releasing "MTCC" MCUs (no other manufacturer made MTCC MCUs) and the Lollipop ROM would simply show a black screen if it found an MTCB MCU. Luckily [MENTION=6041319]dsa8310[/MENTION] used Xposed to spoof this check and Lollipop could then be flashed on any MTCB unit, not only ones with KLD only MCUs.

I d expect something similar rather than just showing "test only" or whatever in red text, something to totally prevent use like a black screen. I could be wrong though.

But we dont even know what your SoM is yet, it may be plain old rev0.3 with 2Gb RAM.
[MTCD  Android Head Units Q&A] zerozoneice:
there's a Greek island which goes by almost the same name ;)
[MTCD  Android Head Units Q&A] typos1:
Ah, lol.
[MTCD  Android Head Units Q&A] zerozoneice:
don't lose focus now, son :)

HERE's a DMESG dump from Sofia units. How can i dump mine and what to look for, reg. board rev.?

or do commands like "lshw" or "dmidecode" work?
[MTCD  Android Head Units Q&A] typos1:
Lol dunno, try the codes, I think it d be easier and quicker to take the top off personally :)

Hint, hint :

https://xdaforums.com/showthread.php?t=1771347

http://www.theandroidhow.com/2014/06/how-to-dump-backup-any-android-rom.html

https://www.youtube.com/watch?v=DyUainEJwLM

:p
[MTCD  Android Head Units Q&A] s.rahus:
I may get my 7.1.1 head unit this week or early next week and then I can check the red text thing on mine and keep you guys posted.

Cheers,

Rahul U S
[MTCD  Android Head Units Q&A] bilaliz:
OK I have read the whole 23 pages, for anyone who comes arrives at this page and does not want to read the whole thread, here is a summary

1- 7.1.1 is available for RK3188 in TEST mode only and some people have bricked their devices trying to update, recovery is iffy at best. the retail version produces a blank screen.

2- pre-installed 7.1.1 on new devices seems fine so far, if you are going that route you should be fine.

3- PX3 = RK3188
[MTCD  Android Head Units Q&A] typos1:
There is no "retail" version, its just another test ROM, theres a theory that all N ROMs will show the test message on rev0.3 SoMs but it hasnt been proved and wont be until [MENTION=3342358]zerozoneice[/MENTION] manages to get a copy of ROM from his unit.

Not aware of anyone bricking their device, on mine the screen is blank but the unit still works and this was probably because [MENTION=5092263]Hal9k_[/MENTION] changed the partition layout on the ROM I was updating form, so not really to do with the update.

Its not so much "pre-installed devices" -its "pre-installed device" only [MENTION=3342358]zerozoneice[/MENTION] has one so far.

Cant remember any problems with recovery.
[MTCD  Android Head Units Q&A] zerozoneice:
i think it's pretty much a new board rev. in the wild... Witson source:

http://www.witson.com/en/displayproduct.html?proID=102846919

once i have time to pull out the unit and pry it open, i can confirm 100%.
[MTCD  Android Head Units Q&A] typos1:
Any luck with getting the ROM off?:)
[MTCD  Android Head Units Q&A] zerozoneice:
no, sorry, i'm really busy this week :(

besides, i'm new at getting ROMs off u know :) :)

i might have something of interest, because it struck me and i couldn't believe it: this unit (or ROM?) allows Poweramp to be controlled out of the box via the MFSW buttons. Volume works of course since it's a global thing, but track next/prev works too...wtf?! :)

Here's a video i shot of it in action, i am changing songs via MFSW with no modifications whatsoever, i didn't even root the box yet...or did Poweramp get an update lately that allows this, while i'm getting (off :)) excited about nothing...

You can also see how fast the unit is...

https://ufile.io/v906z

https://ufile.io/xugat
[MTCD  Android Head Units Q&A] typos1:
I ve never got a ROM off before either :)

That sounds great for power amp users, the MTC devs must have been reading XDA !

Have you tried Substratum on it ?
[MTCD  Android Head Units Q&A] zerozoneice:
never heard of it. just googled now and found out it's an XDA community app...is it a theming thing or what?
[MTCD  Android Head Units Q&A] typos1:
Yeah, I use it on my phone.
[MTCD  Android Head Units Q&A] t-shock:
So (after reading 23 pages), which N rom should I flash?

I'm confussed
[MTCD  Android Head Units Q&A] typos1:
At the moment the one at the bottom of page 3, but all so far have "test only" at the bottom of the screen in red text.
[MTCD  Android Head Units Q&A] t-shock:
Thanks a lot

I made a factory reset on my tablet and after that iGO wont work, so I will experiment a little bit with another firmware

How do you reboot to recovery on a GPS that has buttons?

I ask that because every update that I have done so far, is from the settings
[MTCD  Android Head Units Q&A] typos1:
For MTCD you hold the power button for 10 seconds until the lights blink, then press power again within 2-3 seconds.
[MTCD  Android Head Units Q&A] julien_blanche:
i saw latest firmware on yadi.sk website called new4_px3_7.1(20170705).rar. Can i install this firmware on top of android 5.1 mtcd_mx device ?
[MTCD  Android Head Units Q&A] zerozoneice:
[MENTION=318243]typo[/MENTION]s: still waiting for a ROM from 2 sources.

in the meantime seems there's 7.1.2 units around, check HERE and HERE, and THIS one from Erisin that looks like mine...and if you want one really fast, take THIS one :)

Duhh, i think my XRC is actually Xtrons......can any1 confirm?
[MTCD  Android Head Units Q&A] typos1:
Yes, I ve been looking and I ve seen a fair few 7.1.2. around. For some reason I prefer the idea of an RK3188/PX3 with 2Gb RAM than the RK3368/PX5, not sure why really, usually I d want the fastest processor I can have, I think its cos I d expect 3-4 Gb RAM with an octacore processor, plus I think quadcore is plenty fast enough for all the things I want to use it for.

Dont think XRC is Xtrons, Xtrons is a seller and they sell units with lots of different MCUs from lot of different manufacturers.
[MTCD  Android Head Units Q&A] ricanxd:
The one from ft86club you posted is my post lol. That's my unit on there. Oh and I have a link to a ROM update they sent me.
[MTCD  Android Head Units Q&A] zerozoneice:
my contact @ witson said it's Xtrons...could be new model, because they usually have GS code.

---------- Post added at 06:53 PM ---------- Previous post was at 06:51 PM ----------

small world, ha? :)

so what code exactly is your MTCD?
[MTCD  Android Head Units Q&A] ricanxd:
Not sure, need to look at it again. Here's the download link if anyone wants to analyze the ROM http://www.hizpo.com/Product/CS_Files/new4_px3_7.1_201700705.7z
[MTCD  Android Head Units Q&A] ricanxd:
Here's the build Info..
[MTCD  Android Head Units Q&A] s.rahus:
Guys, so I got the head unit and it came with android 7.1.2 out of the box with no red text anywhere!

Everything was working well, however it seems that the Radio app is hung now. The app opens up and shows the interface. When I try to search the stations, nothing happens (I can hear the touch sound but nothing else). I can change the stations that are stored by default, by those are useless to me. Even if I change the stations manually to the desired frequency, I can hear nothing not even the hiss sound.

I really hope its an app thing or some configuration that I have missed. Or is it a hardware thingy. Any suggestions?

Is there an alternative Radio app that I can use?

Note: The Radio was working perfectly initially, after that the only thing I changed was the time and timezone!

PS: Bluetooth call quality is very impressive!!!

Cheers,

Rahul U S
[MTCD  Android Head Units Q&A] zerozoneice:
cool, so it's also an XRC. Newer MCU than mine. Seems to be newest available (2.54a), but i'm not going to update anything on mine until i identify the support source for my unit :) a MCU changelog would be awesome to have..

HERE is the 2.54a MCU update for anyone interesed...
[MTCD  Android Head Units Q&A] iwan45120259:
i have HU with 7.1.2

anyone can root this
[MTCD  Android Head Units Q&A] zerozoneice:
post link please where u bought it from.

you can try a factory reset, followed by checking radio zone in factory settings (usually password 126), and also in there set power status to "last status" or something, instead of ON.
[MTCD  Android Head Units Q&A] s.rahus:
This is the one- Android 7.1.1 RK3188 4 Core 1.6G*4 Car DVD Player for Golf Polo Passat Tiguan EOS for Seat 2G RAM iNANDR Auto Stereo Radio RDS

http://s.aliexpress.com/F7VVF7zu

(from AliExpress Android)

I did try the factory reset without luck :( . I tried all the region, none worked. As I said it initially worked wonderfully and all of a sudden stopped working. Everything else is working.

I have uploaded the issue to youtube- this is the one:

[youtube]bIAUGKulZi8[/youtube]

It searches for the stations but not picking up any. Even if I do it manually, nothing happens, not even the hissing sound.

Cheers,

Rahul U S
[MTCD  Android Head Units Q&A] s.rahus:
Hey one more this, if I did not connect the antenna cable, the unit would not even boot. Is this by design? So its not just a antenna cable but more than that? I am talking about the black cable with the rectangular kinda box in it in the attached photo.

Cheers,

Rahul U S
[MTCD  Android Head Units Q&A] zerozoneice:
that;s the amplified & powered FM antenna. Did you connect the wire to a 12V lead (labelled ANT_CON i think) on the main harness?

and why do you long press the scan button? single clicking it doesn't work?
[MTCD  Android Head Units Q&A] s.rahus:
Yeah I had connected the blue ANT wire from the main harness to the antenna wire. Single click isn't working so long pressed.

Do you think my Radio IC is gone? :(

Anything else I can try?

Cheers,

Rahul U S
[MTCD  Android Head Units Q&A] typos1:
Its a possibility but I wouldnt take too much notice of what sellers say, but if Xtrons sell GS ones and XRC ones it kinda confirms theyre a seller - a lot of sellers sell units from different manufacturers, manufacturers generally only sell one, theyre own.

Of course, no one has bought a unit with the red text, its only test versions that have it.

Soz to hear about your radio I ve never heard that happen before, strange.

He has a Klyde unit.

At least as its so new your ll have a guarantee.

I just got an MTCD RK3368/PX5 2gb unit and it wont even boot, DOA. Its buttonless and on MTCB/C unit without buttons theres no way to get not recovery if the unit is dead - you have to remove the top and solder on a power button, anyone know if its the same with MTCD buttonless units ? I think it maybe cos theres no way to do the usual procedure - theres no power button to press.
[MTCD  Android Head Units Q&A] s.rahus:
Immediately after turning off the car when I touch the Antenna socket (the end that we plug into the HU) to the body of the head unit there is a small spark, I guess this is normal as the power is still there for some time from the ANT wire? Will this cause any damage?

Cheers,

Rahul U S
[MTCD  Android Head Units Q&A] typos1:
Probably best NOT to touch the antenna socket into the head unit too much then ! Dont think its too much of a problem really.
[MTCD  Android Head Units Q&A] zerozoneice:
fair enough, but who makes XRC, i need to pinpoint the source in order to get support/fw/feedback, etc...

offtopic, i'm thinking i should create a new general thread for PX3 2GB Nougat units, there's already 4 or 5 in the forums so far and we lose track easily of content, plus these units are starting to hit the market & seem popular enough. whatcha think?
[MTCD  Android Head Units Q&A] typos1:
Dunno, a company thats abbreviated to "XRC" that all we know, your ll get zero support apart from possibly the odd ROM or MCU and if you dont get any thanks to [MENTION=4974080]marchnz[/MENTION] you can change your MCU.

No, no, no more threads are the last thing we need, it just causes confusion, theres already far too many threads about the RK3368/PX5 units and the RK3188/PX3 2Gb units, when in reality apart from the extra RAM, faster processor and different version of Android theres not a great deal of difference between all MCTD units and most problems are to do with the non Android side which is exactly the same.

We need LESS threads about different the processors, not more ! If we separated all the RK3368/PX5 specific problems and all the RK3188/PX3 2Gb problems from the problems that affext any MTCD unit, we d have just a few posts !
[MTCD  Android Head Units Q&A] zerozoneice:
there're reports of "autosleep" missing on 2.54a, so i'd rather skip that...

maybe a thread concatenation would make sense then.

---------- Post added at 11:38 PM ---------- Previous post was at 11:36 PM ----------

lol, what? you? :)
[MTCD  Android Head Units Q&A] typos1:
I would read [MENTION=4974080]marchnz[/MENTION]'s entire thread, most people have had success but it depends on what unit you ahve. Also you could jsut bear all that in mind if no MCU updates become available over the next few months.

Yes . . . and no - I mistyped - I have an RK3368/PX5 octacore unit, just got it yesterday and it wont boot, nothing, DOA.

I ve also got an MTCD RK3188/PX3 2 N unit on order . . . as well as my current MTCC unit. :eek:

I will use each one for 2 days, then have one day off ! Lol.

Not really, I ll decide which one I want over the next few months and then sell the other 2, well that was the plan, looks like I ll be sending the RK3368/PX5 unit back.
[MTCD  Android Head Units Q&A] S@lman1996:
Android 7.1.2 UI

The live wallpaper is set by me. Others are a part of UI
[MTCD  Android Head Units Q&A] typos1:
Lol, sorted it, it was a wiring problem, some had to be switched round. Doesnt boot quite as fast as I was expecting, but it does boot a little faster.
[MTCD  Android Head Units Q&A] zerozoneice:
thx, please post also radio app, media player app with file/folder selection options, equalizer app.
[MTCD  Android Head Units Q&A] typos1:
He could use the app APKextractor to get them off.
[MTCD  Android Head Units Q&A] zerozoneice:
i meant screenshots, but i guess APKs would also be welcomed :)
[MTCD  Android Head Units Q&A] typos1:
Oh, lol, got that ROM off yet ? Or at least read up on it ? :D
[MTCD  Android Head Units Q&A] S@lman1996:
Equalizer
[MTCD  Android Head Units Q&A] Oberbergler:
Could you please extract the equalizer apk and publish it? :)
[MTCD  Android Head Units Q&A] S@lman1996:
Ok. I'll try using shareit.
[MTCD  Android Head Units Q&A] typos1:
Lol, now theyve added an extra fake band in the equaliser !!

These units ahve 3 band equalisers, they added an extra 6 fake bands a few years back, now theyve added another one !!

Thing is its only software, they still only have 3 band equalisers.
[MTCD  Android Head Units Q&A] Oberbergler:
Yes I know, but you can play a little bit also with these fake bands to get a better sound :D