RK3066 ROM for Pipo M3 WIFI version - Forum

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RK3066 ROM for Pipo M3 WIFI version

g440i

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2014/05/17 - 08:52

Hi all,

I'm using the Pipo M3 WIFI version, which screen is 1280x800. Which ROM is the latest and the best running on this tablet? I'm also looking for CM ROM but don't know which one is supporting it.

Thanks!

Oma7144

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2014/05/17 - 14:39

CM10.1 build: http://crewrktablets.arctablet.com/?p=1913

Kernel old PCB: http://crewrktablets.arctablet.com/?wpfb_dl=848

Kernel new PCB: http://crewrktablets.arctablet.com/?wpfb_dl=842

- Oma -

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g440i

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g440i

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2014/07/06 - 12:11

Oma7144 said
CM10.1 build: http://crewrktablets.arctablet.com/?p=1913

Kernel old PCB: http://crewrktablets.arctablet.com/?wpfb_dl=848

Kernel new PCB: http://crewrktablets.arctablet.com/?wpfb_dl=842

- Oma -

How to flash it? it seems that they are not zip and can't use CWM to install it.

Need to use RKBatchtool? but how about the kernel.img?

Oma7144

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2014/07/06 - 12:52

Download the v1.3.5 build, it includes the RKAndroidTool. Replace the right kernel in folder rockdev/Images and flash acc. to instructions.

- Oma -

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g440i

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2014/09/01 - 03:38

It seems that I found the root cause of laggy response in the Pipo m3 tablet (may be all RK3066). It seems that the root cause is from the rknand_buffer program, which makes the tablet unresponsive when it is running and consuming somewhat around 10% of CPU usage. This occurs when the internal ROM had been filled up to >80% (that 2GB apps area). When I use Link2SD to move most of the apps to the external SD and free up the internal ROM area, the tablet is responsive again!!! I have searched for that rknand_buffer program and it seems that not just RK3066 is having this problem, the problem also occurs in other chip, like RK3188.

Is there any way to fix up this?

JochenKauz

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2014/09/02 - 23:38

What rknand_buffer program? Did we miss something in the sources? If we did, we would be really glad to get some hints, cause we search a long time for a solution and need everything we could get.

Per aspera ad astra, we rock the Tablets !

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g440i

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2014/09/03 - 03:44

I'm not sure is it caused by bad flash block in the flash memory near the end of the apps storage area or just because the rknand_buffer program is really sucks. However, before using Link2SD, it always trigger the rknand_buffer and consume around 10% CPU with the tablet stalls.

JochenKauz

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2014/09/13 - 00:41

Sorry, I do not know any rknand_buffer program.

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Amarok

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2014/12/13 - 19:58

It's a process connected to major performance problems in rockchip devices. It's adding a great deal of CPU load constituted of I/O interrupts. Just for your information, though the thread seems to be fairly outdated.

g440i

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2014/12/14 - 01:25

Amarok said
It's a process connected to major performance problems in rockchip devices. It's adding a great deal of CPU load constituted of I/O interrupts. Just for your information, though the thread seems to be fairly outdated.

So there is no way to solve it?

Amarok

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2014/12/14 - 10:06

None that I know of. I googled around and found a solution like "go buy a class 10 microSD card and mount /data to it" and people say it works (because the problem is allegedly caused by very slow internal memory quality ) . However I'm currently trying to find some other solution, 'cause of several reasons :

1) something doesn't add up - if the NAND is so slow, why would the microSD controller be faster? Te card itself may be fast, but that doesn't mean the device will be able to read/write to it with the max speed.

2) i get this problem after some time and only shortly after unlocking the screen after a deep sleep and long inactivity, but after a bit of time it settles down (but I have a lot of free space)

3) some guy said the problem emerges when he has few free space, he said about 80% space - strange if you ask me.

I'm thinking maybe some cache size tuning can solve this... I'll let you know if I work something out.

g440i

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2014/12/15 - 11:59

Amarok said
None that I know of. I googled around and found a solution like "go buy a class 10 microSD card and mount /data to it" and people say it works (because the problem is allegedly caused by very slow internal memory quality ) . However I'm currently trying to find some other solution, 'cause of several reasons :

1) something doesn't add up - if the NAND is so slow, why would the microSD controller be faster? Te card itself may be fast, but that doesn't mean the device will be able to read/write to it with the max speed.

2) i get this problem after some time and only shortly after unlocking the screen after a deep sleep and long inactivity, but after a bit of time it settles down (but I have a lot of free space)

3) some guy said the problem emerges when he has few free space, he said about 80% space - strange if you ask me.

I'm thinking maybe some cache size tuning can solve this... I'll let you know if I work something out.

I tried mounting microSD as the data partition and for (1), it works but it seems that this solution is not very stable. I got the microSD randomly disconnected and I need to reboot to remount it. I'm not sure it's the problem of the CPU or the OS. My OS is Android 4.1.1.

For (3), I have the problem when the partition for apps fill up over 60%. That means if I install more apps, it start slow down.

Amarok

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2014/12/15 - 12:50

I spent some more time investigating this problem, my most important observations so far are:

1) Yes, it seems to be to a certain degree related to the amount of free space in NAND, but in my tablet I have <50% space occupied and still I have this problem...

2) I have a feeling that the problem is mostly caused by some background data sync by apps that have to catch up, because the device works quite smoothly when used frequently and kept online.

Oma made a script mounting NAND stuff to external SD, so I'm gonna buy a class 10 uSD and give it a shot, though I'm quite skeptical about it since why should a device with such a poor intrnal memory suddenly have a microSD bus capableof utilizing the full speed of a class 10 microSD? We will see.

As to this spontaneous unmounting - I don't know what's up, but my best guess would be it's an imperfect electrical contact somewhere inside of the device, because out of the top of my head I can't think of a bug that would "accidentally" programatically eject a storage device... You may want too look inide of your device if you are a DIY kind of guy, but it coes with a risk. But otherwise than that - idk if there's a cure.