Blacklist of locked Down Version´s of RK3188 CPU

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jesurun-cx-919

Just ordered one of these sticks, does anyone have the same model? could this be a T model?

http://dx.com/p/jesurun-cx-919-quad-core-android-4-1-google-tv-player-w-1gb-ram-8gb-rom-xbmc-netflix-black-221308

Brand	Jesurun
Model	CX-919
Quantity	1
Material	Plastic
Color	Black
Operating System	Android 4.1
Chipset	RK3188
CPU	Quad cortex-A9
Processor Frequency	312~1608MHz
GPU	Mali 400
Memory	DDRIII 1GB
Storage	8GB

[JDfense]

Good idea, Steve. That's what I thought before. The boot loader has a special lock down and is tied to all img 's of the model T firmware. We have to search for the adjustments in the boot loader and the connection to the imgs, but it is only a thought and I have no proof for it.

JDfense --->I8160

[stevemp]

You mean the hole model T production is not intentional different, it is fail production for the trashcan. I can't believe it. I hope you are not right and we will find the trick how to handle them.

JDfense --->I8160

Archos does that with the omap4 4460 G9 tablets. If the cpu passes the test then it becomes the 1.5Ghz Turbo, fails become the 1.2Ghz. Archos sets the clock rate in the bootloader, try comparing the bootloaders with a hex editor. But it might not boot at the higher clock speed, my 1.2Ghz will boot at 1.4Ghz but some 1.2Ghz will boot at 1.7Ghz.

[rdsok]

You mean the hole model T production is not intentional different, it is fail production for the trashcan. I can't believe it. I hope you are not right and we will find the trick how to handle them.

JDfense --->I8160

I don't believe that it's a "failed" production... I think they simply don't pass the tests at the higher 1.6Ghz-1.8Ghz so they are using them for lower speeds which they do pass the tests at.

It's a common practice with CPU/GPU manufacturers, ie AMD and Intel as two examples. They will make only one design for a series and then after their production run is over... each chip is tested to see how fast it goes without errors and they then mark/set those for that frequency. This increases their salable yield and keeps costs down. If say a quad core chip fails on one CPU... they disable the bad core and sell it as a triple core. The same holds true if a chip fails at 4Ghz... they may sell it at 3.9Ghz or less.

The real complaint here has been that many of these have been sold to customers as RK3188's... not the T version that they are marked as.

Now on the otherhand... Rockchip is saying the main difference is that these aren't made with the retina display in mind so they are specifically for TV Sticks and not phones or tablets that need that feature. I think that is only a half truth myself... I think these chips simply failed that test ( and the speed one ) so they clocked them down and used lower power so they do work ok... but aren't telling us the whole story simply to appease us.

Really... we don't know everything at this time... so there is bound to be speculation until the whole truth finally comes out.

[jp.mk802]

try RADXA img with MK802IV

I have similar problem with mk802iv from banggood. I tried numerous distrous and kernels the same blinking problem, and after few blinks the system reboot sometimes from boot sector sometimes from SD card. It is quite random. But one file worked. The latest ROM for RADXA (http://dl.radxa.com/rock/images/ubuntu/latest/) the system is stable but have no wifi although I had not try yet to export firmware and modules from original system. Flushing the single img file to NAND is easy. Can you try it and let me know if it works for you. I am not sure where the clue is, I hope someone will find it out.

[neomode]

I think this will be a huge of Work.
I have done a Rom for the MK802IV with AP6210. There are Models out with T and a non T CPU.
Make my 2.1 Beta Rom with an Old Loader Firmware and the Kernels from the Marvin Tools works on the T Models too and can be overclocked.
But when you have a very Bad T Model you will get only 1.6 or 1.7 Ghz not more.
What we need is the Kernel Source for the T Models and see what we can change.

Neomode

[stubuchy]

I think they are all the same chip... BUT some pass the stress tests and others don't, those that dont are locked at the lower speed and market -T, obviously some of the chips that pass the test will also go into the -T pile to make the numbers up when not enough failures, so you will find that some over clock and some don't...

Same as Intel, in the old days they were are fabricated as the fasted chip and then graded, the ones that qualified for the top speed were used as that, then they were graded down from there and sold as different speeds, but some basic models were able to clock back to an amazing clock speed as they had to use the best chips to make the numbers up of the lower speeds, some were not able to as they were the failed ones...
luck of the draw unless you use a quality manufacturer that has decided to use non -T's like MiniX, mine clocks to 1800 without an issue and is very fast you pays your money and you get what you pay for.... unless you were lucky

[JDfense]

You mean the hole model T production is not intentional different, it is fail production for the trashcan. I can't believe it. I hope you are not right and we will find the trick how to handle them.

JDfense --->I8160

[neomode]

AW: Blacklist of locked Down Version´s of RK3188 CPU

Man, it's meaningless, you could doesn't mean others could.
In fact most of them won't be able to copy your result.
It's a bad chip not qualified to be RK3188 and became a T.

That's is it what I say the hole Time.
The T Is a Chip not run proper as it should.

Neomode

Gesendet von meinem GT-I9305 mit Tapatalk

[mikele]

lol you good in your Head ?

Yes TVDroid send me 69.99$ X 2

lol

[TVDroid]

lol you good in your Head ?

[MINIX]

Yes, see my T, it can perfectly run @ 1.8 GHz, T is not crap.

T is not crap, but it's no better than the non-T.
And you could run 1.8GHz perfectly means nothing but lucky.
Are you willing to pay to those who can't run even 1.6GHz? I guess not.

[MINIX]

There already is a link to the kernel..

Link to the archive with pics of my device

Man, it's meaningless, you could doesn't mean others could.
In fact most of them won't be able to copy your result.
It's a bad chip not qualified to be RK3188 and became a T.

[rdsok]

Yes, see my T, it can perfectly run @ 1.8 GHz, T is not crap.

... but not all "T" models are working as yours is either. Several others have reported they weren't able to OC at all beyond 1.4-1.6Ghz even after trying what you suggested.

[TVDroid]

In my opinion the new 1.4ghz cpu its not that crap like it looks..

Yes, see my T, it can perfectly run @ 1.8 GHz, T is not crap.