[ROM] RK3188 Tab V88 by Oma rocks !

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lambstone

lambstone

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Mar 27, 2008
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Oma7144 said:
I guess you mean this?

We see the trend not to show the information in a lot of JB builds, especially in JB 4.2.2 builds. This maybe is in conjunction with multiuser.

I'm personally of the opinion that the from the os extrapolated data are not correct. Anyway, the data is there and could be visualisied by One Power Guard for example.

- Oma -
Click to expand...
Click to collapse


Not really what I meant was the default android battery information.

The one which you access via Settings > Battery.

It does not show up at all and it is my belief that as a result the battery icon does not change.
 
Oma7144

Oma7144

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Jul 20, 2012
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lambstone said:
Not really what I meant was the default android battery information.
The one which you access via Settings > Battery.
It does not show up at all and it is my belief that as a result the battery icon does not change.
Click to expand...
Click to collapse

Sorry for the wrong guess. Tested that on my tab with all stock kernel that Chuwie have released and can't find the issue.

Any idea of the hardware revision of your tab? My tab has PCB: V8_MV1.1_20130325.


- Oma -
 

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lambstone

lambstone

Senior Member
Mar 27, 2008
1,693
300
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Redmi K20 Pro
Oma7144 said:
Sorry for the wrong guess. Tested that on my tab with all stock kernel that Chuwie have released and can't find the issue.

Any idea of the hardware revision of your tab? My tab has PCB: V8_MV1.1_20130325.


- Oma -
Click to expand...
Click to collapse

Yeah, that's what I meant, android logging of battery usage is broken. It doesn't tell you which app used what.

You're just using a different app and that's just entirely different.
 
Oma7144

Oma7144

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Jul 20, 2012
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lambstone said:
Not really what I meant was the default android battery information.
The one which you access via Settings > Battery.
It does not show up at all and it is my belief that as a result the battery icon does not change.
Click to expand...
Click to collapse

lambstone said:
Yeah, that's what I meant, android logging of battery usage is broken. It doesn't tell you which app used what.You're just using a different app and that's just entirely different.
Click to expand...
Click to collapse


Hm, I think we mixed up two things.

1. battery event from the kernel is available and Android 4.2.2 show up that information (pic 1: loading, pic 2: warning)

2. battery usage by app is not shown by the OS; you can use a 3rd party app

Anyway, I can only tell what is the case on my tab.

- Oma -
 

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lambstone

lambstone

Senior Member
Mar 27, 2008
1,693
300
Huawei P20 Pro
Redmi K20 Pro
Oma7144 said:
Hm, I think we mixed up two things.

1. battery event from the kernel is available and Android 4.2.2 show up that information (pic 1: loading, pic 2: warning)

2. battery usage by app is not shown by the OS; you can use a 3rd party app

Anyway, I can only tell what is the case on my tab.

- Oma -
Click to expand...
Click to collapse

Yeah, your point number two was what I was referring to.

Meh. This sucks. That's one major reason why I didn't stay on 4.2.2
 
Oma7144

Oma7144

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Jul 20, 2012
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Gents,

we do have definitely more than one hardware revision.

PCB V8_MV1.1_20130325 - S/N V88 Quad16G2130400xxx (I guess: 16GB - G2 - 2013 - lot 400 - no xxx)

PCB V8_MV1.1_20130325 - S/N V88 Quad16G2130501xxx

PCB V8_MV2.0_20130415 - S/N V88 Quad16G2130502xxx

PCB V8_MV3.0_20130427 - S/N V88 Quad16G2130700xxx

PCB V8_MV4.0_20130621 - S/N V88 Quad16G2130800xxx


Thanks for fotos to aethis!


Firmware:

a) V88 Stock Build Date 2013-04-26 - Initial Android 4.1.1 Release, kernel wqs #301 preempt 24.04.2013 (was on my tab), RK3188Loader(L)_V1.02
b) V88 Stock Build Date 2013-05-09 - update 1, with kernel bob #460 preempt 07.05.2013, RK3188Loader(L)_V1.02
c) V88 Stock Build Date 2013-05-25 - update 2 with kernel bob #11 preempt 25.05.2013, RK3188Loader(L)_V1.02
d) V88 Stock Build Date 2013-06-03 - Initial Android 4.2.2 Release, with kernel bob #17 preempt 29.05.2013, RK3188Loader(L)_V1.20

Parameter are in any case the same:
mtdparts=rk29xxnand:0x00002000@0x00002000(misc),0x00006000@0x00004000(kernel),0x00008000@0x0000a000(boot),0x00010000@0x00012000(recovery),0x00020000@0x00022000(backup),0x00040000@0x00042000(cache),0x00400000@0x00082000(userdata),0x00002000@0x00482000(kpanic),0x0012a000@0x00484000(system),-@0x005ae000(user)

TNT and Oma releases: RK3188Loader(L)_V1.04

- Oma -
 

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Oma7144

Oma7144

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I am still of the opinion that the 2nd method in post #30 will work for you.

- Oma -
 
Oma7144

Oma7144

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Power Management:

Accu Capacity = 15.8 Wh / 3,7 V = 4,27 Ah


1) Charging:

Premises:
- Power Supply with 5V 2A
- Accu Capacity 4,27 Ah
- max. Charge Rate C/4 = 1,07 A
- Initial Condition 20% Capacity
- Charge Rate constant 1 A
- Loss of Load ~ 25%

Charging-Time = 4,27 Ah * 0,8 / 1,07 A * 1,25 = 4 h

With no activity we got a Charge Rate of appr. 1,8 A (0,6 A the last 10%). So tab gets loaded in 2 h.


2) Discharging

Set-up:
- Oma JB 4.2.2 v3.0.1
- Accu about 30 load-cycles
- brightness 75%, wlan off
- Battery Monitor Widget as background app
- Accu Capacity not under 20%

a) Videoplay 45min on repeat (CPU @ 312 MHz) > appr. 11 %/h > appr. 7,25 h (20 % Capacity)

b) Gameplay simulated by running Antutu on repeat (CPU @ 312, 816, 1608 MHz) > appr. 20 %/h > appr. 4 h (20% Capacity)


3) Deep sleep

- implemented


- Oma -
 

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Oma7144

Oma7144

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Jul 20, 2012
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Gents,

I have found such kind of feedback:

After unbricking i tried to brick it again in the same way with the same firmware, but i did not succeed.
Click to expand...
Click to collapse


All RK3188 tabs identifies itself as rk30sdk. I don't know why.

Flash-Driver ID's:

RK29 - ID 2207:290a
RK30 - ID 2207:300a
RK31 - ID 2207:310b

The latest Flash-Tools (RKAndroid-Tool v1.7 and RKBacht-Tool v1.37) get ready also with Flash-Driver ID 2207:300a.

I don't know what windoof is doing with not properly installed or otherwise corrupted USB drivers. Please make sure you are operating with the right Flash-Driver, which have ID 2207:310b.

- Oma -
 
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arielp

arielp

Senior Member
Jul 1, 2008
77
9
is it possible to create flashable zip (cmw)

to toggle between TabletUI <> Phablet UI



im on 3.1 kinda reluctant to re-flash to 3.0.1, due to too many softare instaled and affraid of bricking my chuwi during update :p
 
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Oma7144

Oma7144

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Jul 20, 2012
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Chuwi V88 by Oma JB 4.2.2 v3.2

- Internal Storage 4,0 GB
- external SD mounted as NAND (up to 64 GB)
- Device spoofed as Nexus 7
- Gameloft compatible


For this build we will change now partition-layout on the NAND.
Therefore we use EradeIDB in RKAndroid-Tool.
Pls make sure that current counts up to 4096 (otherwise tab will reboot).

Build comes with CWM, so we need also the format_NAND_fix (see instructions).

If you don't like the mount then pls install intSD_to_NAND_fix directly after format_NAND_fix.

You can also use fixes from post #53 to toggle UI.

- Oma -
 

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F

frankicho

Member
Oct 10, 2008
14
1
Oma7144 said:
Chuwi V88 by Oma JB 4.2.2 v3.2

- Internal Storage 4,0 GB
- external SD mounted as NAND (up to 64 GB)
- Device spoofed as Nexus 7
- Gameloft compatible


For this build we will change now partition-layout on the NAND.
Therefore we use EradeIDB in RKAndroid-Tool.
Pls make sure that current counts up to 4096 (otherwise tab will reboot).

Build comes with CWM, so we need also the format_NAND_fix (see instructions).

If you don't like the mount then pls install intSD_to_NAND_fix directly after format_NAND_fix.


- Oma -
Click to expand...
Click to collapse

Thanks! Keep hard work. It is very good. After install this JB 4.2.2 v3.2, the operation is smooth & seems to be stable than before. Enjoy to use. :good::laugh:
 
splotz

splotz

Senior Member
Feb 10, 2012
108
10
Europe
Hello Oma,

is it possible to improve the charging so it starts charging a full akku again when going down to 95% and not already at 99% ?

Kind Regards
Splotz

Would extend battery lifetime.
 
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