Author Topic: SV27C Touchscreen not responding (Solved)  (Read 1851 times)

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Offline markxyz

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SV27C Touchscreen not responding (Solved)
« on: December 01, 2011, 07:52:37 PM »
SV27C capacitive 7inch.
black sockets. vibration. wm8650. 256mb ddr2.


Hi, ive tried all the options on the latest and previous roms and although my tablet works the touchscreen does not respond. Ive tried calibrating screen using the mouse but it keeps saying calibration failed even when im right on the centre of the cross hairs. Ive tried switching it on and off and on again etc.

Any suggestions?..
Any ideas when a new rom will be released?

Thanks All..
« Last Edit: December 08, 2011, 05:58:33 PM by damonraven »

Offline HardcoreHacker

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Re: SV27C Touchscreen not responding
« Reply #1 on: December 01, 2011, 08:03:40 PM »
Hi Mark,

did previous Uberoid versions work on your tablet ? For the SV27C there were some changes a while ago, I can't recall exactly which. So the option from the changer doesn't work ?

Offline leeh33

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Re: SV27C Touchscreen not responding
« Reply #2 on: December 01, 2011, 08:24:21 PM »
I've been doing a few changes in Changer and the env folder to (hopefully) sort out issues people are having with their touchscreen failing. I'm still working on it to make sure I have covered as much as possible that was raised on the (old ;)) forum. I'll release an edited v10/v9.1.2XL mix ROM soon. :)

Offline Is0L8TeD

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Re: SV27C Touchscreen not responding
« Reply #3 on: December 02, 2011, 12:41:21 AM »
SV27C capacitive 7inch.
black sockets. vibration. wm8650. 256mb ddr2.


Hi, ive tried all the options on the latest and previous roms and although my tablet works the touchscreen does not respond. Ive tried calibrating screen using the mouse but it keeps saying calibration failed even when im right on the centre of the cross hairs. Ive tried switching it on and off and on again etc.

Any suggestions?..
Any ideas when a new rom will be released?

Thanks All..


Hi markxy,

I've the full archieve for the SV27C if you need it, only 416MB  :) . But I've helped solve the SV27C before.
Use this link to download the uzImage.bin and after creating Uberoid to Micro SD replace the existing one. uzImage.bin - 3.0 MB
If the links dead let me know and I'll fire it up again.
To tweak the calibration issue follow this:
You may think that touch isn't working because on tapping small icons you get no touch response, but to prove it is, just tap fairly hard the middle of the screen, and if it goes to the clock page, then touch is working but will need calibrating. Once calibrated you should find touch more responsive and accurate. Alternatively press the menu button on the top of your tablet and tap on the settings area, as this area is defined you may find you get into the settings more easily to calibrate the touchscreen.

If you still have problems calibrating the touch, Edit env_uboot and delete the line on the Micro SD card
setenv wmt.io.ts.2dcal 3 -17438 67608023 11859 10 -5362731 80387

Reflash the tablet. Once booted connect a mouse to the USB port and navigate to Settings->Touchpad calibration. Calibrate - Done

After calibration you can Run Terminal Emulator (In Uberoid 10 you can find this program by going Apps\DevTools\Terminal Emulator).
and enter this command:
wmtenv get wmt.io.ts.2dcal

You will get your calibration values. Put these values to env_uboot after
setenv wmt.io.ts.2dcal
and reflash.

or Run Terminal emulator (In Uberoid 10 you can find this program by going Apps\DevTools\Terminal Emulator).
and enter these commands once, and one at a time; So for example start terminal, type in (careful of spacing):
wmtenv set wmt.io.ts.2dcal 5 -19080 43309952 15308 125 -5214598 50597
press Enter, after that type:
su
pres Enter and type:
reboot
press Enter

Device will reboot and will start with new settings.

wmtenv set wmt.io.ts.2dcal 5 -19080 43309952 15308 125 -5214598 50597
wmtenv set wmt.io.ts.2dcal 207 -20840 81782459 13308 -61 -3450348 97742
wmtenv set wmt.io.ts.2dcal -35 -17480 34729366 11700 33 -3553183 39892
wmtenv set wmt.io.ts.2dcal -2 -17623 35310706 12062 45 -4622076 40938
wmtenv set wmt.io.ts.2dcal -239 -26732 105697900 18313 -56 -8190911 98806
wmtenv set wmt.io.ts.2dcal 118 -19808 43798867 14916 126 -4956085 50984
wmtenv set wmt.io.ts.2dcal -39 -21333 85072641 13847 -23 -3288281 101942

Let me know how you get on  :android-lol:
Walkthrough-http://www.techknow.t0xic.nl/forum/index.php?topic=174.0
MID 7" Wonder Media WM8650 VT1609 Chipset 800mHz-256MB-2GB, upto 32GB
Green LED on - Red LED charging

Offline DFX

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Re: SV27C Touchscreen not responding
« Reply #4 on: December 02, 2011, 11:41:53 AM »
Hi IsOL8TeD,

My 10yr old messed up the wife's SV27C and I am am going crazy! Could you help out with the full archive (the wife loves the Worms game) and I have not been able to get the screen to work.

Thanks

DFX

Offline HardcoreHacker

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Re: SV27C Touchscreen not responding
« Reply #5 on: December 02, 2011, 12:51:11 PM »
Hi DFX,

can you try out Is0L8TeD's fix ?

Offline Is0L8TeD

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Re: SV27C Touchscreen not responding
« Reply #6 on: December 03, 2011, 12:09:49 AM »
Hi DFX,

It'll depend on what your 10 yr old has done  :android-hypnotized: reflash the tablet using option 26 or 32.

Based on option 32 (but could also apply to 26), the only downside originally was after reboot I have to wait around 4 minutes to have TS. Everything else is really charged and running with mouse, but no TS.

Press the power button to make the tab hibernate, Wait untill the green led switchs off, Press again the power button to switch on the tablet, Wait a few seconds ...

Voila! TS working!!!

After calibration you can Run Terminal Emulator (In Uberoid 10 you can find this program by going Apps\DevTools\Terminal Emulator).
and enter this command:
wmtenv get wmt.io.ts.2dcal

You will get your calibration values. Put these values to env_uboot after
setenv wmt.io.ts.2dcal
and reflash.

This also works with leeh33's tweaked version of Uberoid: uberubertweaked-a-v10-v9-1-2xl-mix-t1329.html

Here's the original env_uboot for the SV27C
Code: [Select]
setenv memtotal 212M
setenv mmcid 0
setenv lpj AUTO
setenv ipaddr 192.168.0.2
setenv serverip 192.168.0.1
setenv gatewayip 192.168.0.1
setenv netmask 255.255.255.0
setenv kernelargs \
  setenv bootargs mem=${memtotal} root=${filesystem-NAND_mtd} noinitrd rootfstype=yaffs2 \
  rw console=ttyS0,115200n8 lpj=${lpj} ${android_bootargs} ${platform_bootargs} \
  quiet

setenv bootcmd \
  nandrw r ${kernel-NAND_ofs} 0x1000000 ${kernel-NAND_len}\; \
  if iminfo 0x1000000\; then \
    run kernelargs\; \
    bootm 0x1000000\; \
  fi\; \
  echo No kernel found

setenv logocmd \
  nandrw r ${wmt.nfc.mtd.u-boot-logo} ${wmt.display.logoaddr} 10000\; \
  nandrw r ${wmt.nfc.mtd.u-boot-logo2} ${wmt.display.logoaddr2} 40000\; \
  nandrw r ${wmt.nfc.mtd.kernel-logo} ${wmt.kernel.animation.addr} 80000\; \
  display init force\; \
  decompanima -f  ${wmt.display.logoaddr2} 0x3000000; \
  decompanima -f  ${wmt.display.logoaddr} 0x3000000

setenv wmt.display.logoaddr 500000
setenv wmt.display.logoaddr2 550000
setenv wmt.kernel.animation.addr f600000
setenv wmt.audio.i2s vt1603:f1:f2:ff:ff:100
setenv wmt.io.pwbn 100:0:2000
setenv wmt.eth.param 1
setenv wmt.gpi.bat [0:0:00020000:d8110040:d8110080:d8110000:d8110480:d81104C0][1:0:00000020:d8110040:d8110080:d8110000:d8110480:d81104C0][2:1:00010000:d8110040:d8110080:d8110000: d8110480:d81104C0]
setenv wmt.gpo.camera1 1:0:7:D8110040:D8110080:D81100C0
setenv wmt.gpo.wifi 6:1:6:d8110040:d8110080:d81100C0
setenv wmt.gpt.gsensor 3:8:d8110040:d8110080:d8110000:d8110480:d81104c0:83000000:d8110300:8:d8110320:6
setenv wmt.io.bat 3:2:1000:db1:b8b:db1:d7a:d43:d0c:cd5:c9e:c67:c30:bf9:bc2:b8b
setenv wmt.io.gsensor 1:3:4:0:1:1:-1:2:-1
setenv wmt.sys.keypad commonboard:1:rc_1:4:c0_73:c1_72:r0_9e:r1_8b
setenv wmt.pwbn.param 100:0:500
setenv wmt.ui.storage 7
setenv wmt.io.touch 1:IT7260:0:800:480
setenv wmt.bus.i2c i2c0:1:1:i2c1:1:1
setenv bootdelay 1
setenv wmt_ui_hibernation 1
setenv wmt_sys_powerhold 0
setenv wmt.gpo.vibrator 1:1:2:D8110040:D8110080:D81100C0:1
setenv wmt.camera.param 0:0
setenv android_bootargs init=/init
setenv platform_bootargs wmtvo=2:1:24:800:480:60
setenv wmt.display.param 2:0:16:0:0:0
setenv wmt.display.tmr 40000:0:10:46:800:20:10:23:480:10
setenv wmt.display.pwm 0:25:50:99
setenv wmt.io.mxcgsensor 1:3:4:0:1:1:1:2:-1
setenv wmt.vt160x.bat 0:1:10:0
setenv wmt.model.no 7inch_vt1603_ite7260
setenv wmt.io.ts.2dcal 19334 -403 5283 -31 19996 -102648 19211
Walkthrough-http://www.techknow.t0xic.nl/forum/index.php?topic=174.0
MID 7" Wonder Media WM8650 VT1609 Chipset 800mHz-256MB-2GB, upto 32GB
Green LED on - Red LED charging

Offline DFX

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Re: SV27C Touchscreen not responding
« Reply #7 on: December 08, 2011, 12:55:25 AM »
Hi Guys!

Sorry it took me so long to get back to you but it's been a rough work week!
You guys are the best! I followed the last post and it worked as promised!
The wife is happy (except for no worms game) and the  son brought home his report today with 10 A's, 7 B's and 2 C's!
Thanks to you guys I am the wife's hero for fixing her tablet and the Son is her little Brainiac.

Thanks so Much!

DFX

 

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