Jump to content


Photo

ZT-280 C91 touchsceen malfunction and calibration


  • Please log in to reply
16 replies to this topic

#1 DvO

DvO

    Member

  • Jr. Member
  • PipPip
  • 18 posts
  • LocationGermany

Posted 18 February 2012 - 04:56 PM

I write this to share experience that may be helpful to others as well.

When I received my ZT-280 C91 and let it boot for the first time, I did not yet remove the thin transparent plastic display cover.
At the end of the boot processes, the touchscreen was calibrated automatically, though I did not pay much attention to that.
When I then tried out using the tablet (with the plastic cover meanwhile removed), the touch screen behaved extremely erratically:
for most time it did not respond at all, and when it did, it behaved in a totally wrong way, producing random 'phantom' touches.
I attach a video clip for demonstration: Attached File  ZT280C91_miscalibrated.wmv   7.56MB   79 downloads.
This made the tablet absolutely unusable, since apps, settings, etc. could not be controlled.

I complained at the online shop and was already preparing to send back the item. Yet meanwhile I got a second tablet of the same kind,
which worked fine. When I updated its firmware, I realized the calibration process and got the idea that I could try the same with the
'broken' tablet. During re-installing, I made sure not to touch its display while calibrating, and then all the problems were gone!
So it turns out that my mistake was not to remove the plastic protection of the display right at the beginning.

Interestingly, the tablet comes with a CapTouch applet, which seems to work on the 2N version, but not on the 3a version.
On the latter version, running the recent ZT280_H1_3a_C91_Android4.0_0206_V1.5 firmware I had downloaded from Zenithink,
the calibration app has no effect. Calling /system/bin/android_I2C_Calibrate_V1_0 manually from the shell prints

Begin:
open failed.

apparently because /dev/pixcir_i2c_ts0 does not exist. The logcat output contains:

W/CapTouch( 2032): wait 2 seconds

...

E/logwrapper( 6724): executing /system/bin/android-I2C-Calibrate-V1.0
failed: No such file or directory
I/logwrapper( 2032): /system/bin/android-I2C-Calibrate-V1.0 terminated
by exit(255)
I/ ( 2032): com_zt_CapTouch_CapTouch_execCapPixcir : rc = 255
I/ ( 2032): open '/sys/devices/virtual/input/mice/name' failed
I/ ( 2032): '/sys/devices/virtual/input/input0/name' 'ecompa'
I/ ( 2032): Couldn't find or open 'calibration' driver (No such
file or directory)
W/CapTouch( 2032): myFile : /proc/driver/nastech
W/CapTouch( 2032): myFile is failed
W/CapTouch( 2032): fout = null


Edited by DvO, 19 February 2012 - 01:03 AM.


#2 RenGyoshi

RenGyoshi

    Advanced Member

  • Jr. Member
  • PipPipPip
  • 331 posts
  • LocationJapan

Posted 18 February 2012 - 07:13 PM

I complained at the online shop and was already preparing to send back the item. Yet meanwhile I got a second tablet of the same kind, which worked fine. When I updated its firmware, I realized the calibration process and got the idea that I could try the same with the 'broken' tablet. During re-installing, I made sure not to touch its display while calibrating, and then all the problems were gone!

As you wrote, reflashing is a way to recover this problem without sending tablet back.

Another way is to connect USB mouse and run calibration.
  • DvO likes this
ZT280-C91 7n/ICS 20120314_2n with Omarahum's 1GHz kernel.
Seems fast and stable with long battery life, keeping to check performance.

#3 crashzilla

crashzilla

    Newbie

  • Jr. Member
  • Pip
  • 8 posts

Posted 19 February 2012 - 12:33 AM

As you wrote, reflashing is a way to recover this problem without sending tablet back.

Another way is to connect USB mouse and run calibration.

You can also calibrate the screen this way.

Shut tablet completely off not put in standby

Hold the volume + (plus) button (the side closest to the camera button) and power on the tablet
The tablet will turn on and calibration process will start.

Do not touch the screen during the calibration process

Tablet will reboot automatically.
Crashzilla

Zenithink C91 C92 C71
HP Touchpad
Thinkpad Android Tablet
Flytouch 2 Flytouch 3
WM 8650

#4 DvO

DvO

    Member

  • Jr. Member
  • PipPip
  • 18 posts
  • LocationGermany

Posted 19 February 2012 - 01:15 AM

Thanks RenGyoshi and crashzilla for your hints.

Indeed, using a USB mouse as input device is a good workaround when the touchscreen has a problem.

Shut tablet completely off not put in standby.
Hold the volume + (plus) button (the side closest to the camera button) and power on the tablet
The tablet will turn on and calibration process will start.

This does not work at least on my 3a tablet: it enters update mode but not calibration mode.
This seems related to the calibration software problem I mention above in my updated post.

Edited by DvO, 19 February 2012 - 01:17 AM.


#5 omarahum

omarahum

    Zenithink Tablet User / Information Transmitter

  • Global Moderators
  • 6,528 posts
  • LocationNYC

Posted 19 February 2012 - 10:25 PM

I'm guessing that since the 3a tabet is 10 point multi-touch and the 2n is only 2 point, calibrating them would be a different process, or I could be completely wrong, lol.....

zenithinklogosforsignature3.png
Zenithink ZT-180-101 Original 10" Epad (Ruby 1.2 / 576 - B0) (0603 Froyo) - {July 2010} R.I.P. - May 2013
Zenithink ZT-180-701A 7" Upad (Cameo - E3) (0613/0618 Froyo) - {April 2011}
Zenithink ZT-180-102 10" v2 Zepad (Jade 2.3-Blue - G0) (0613/0618 Froyo) - {April 2011}
Zenithink ZT-280-C91 10" Zepad (H1_2n : 0217 GB
@ 900MHz w/ 2GB Data Partition) - {Sept. 2011}
Zenithink ZT-280-C71 7" Upad (E7_1n : 0217 GB @ 900MHz w/ 1.5GB Data Partition) - {Sept. 2011}
Zenithink ZT-283-C93 10" ZTPad (H6_1f : 0911 ICS w/ 2GB Data Partition and working (pl2303) USB GPS)
- {Oct. 2012}
Zenithink ZT-283-C97 9.7" ZTPad (I1_2a :
0910 ICS w/ 2GB Data Partition and working (pl2303) USB GPS) - {Nov. 2012}

SlateDroid ZT-180 WIKI \ Zenithink Website \ Zenithink FTP \ Stock ROMs \ ZT-28* Modified Kernels & RecoveriesM \ Donations Accepted!
If I've helped you or are using an overclocked kernel I've uploaded, and wish to help support my efforts, please consider leaving me a donation. Thank you!
btn_donate_SM.gif ॐ 
Please click on the Like This button for any posts you like or have helped you to show your appreciation...
Also know that all the staff here are volunteers, we don't get paid for our time spent here, so please be patient with us... Thank you!


#6 atp_uestc

atp_uestc

    Advanced Member

  • Jr. Member
  • PipPipPip
  • 615 posts

Posted 19 February 2012 - 11:26 PM

if 3a, and jitter, we will offer a patch this days.
if 2n/3n , just calibrate it.

you should check your barcode
omarahum ask me to write below,although i don't know what means:

Liao Dengyan, Zenithink ROM Developer
Email: dyliao@zenithink.com
Have a question for me? Email me the link to your post here on SlateDroid.

#7 HomoSlatiens

HomoSlatiens

    Newbie

  • Jr. Member
  • Pip
  • 9 posts
  • LocationEU

Posted 21 February 2012 - 02:30 AM

if 3a, and jitter, we will offer a patch this days.
if 2n/3n , just calibrate it.

you should check your barcode


I have 3a and jitter, when and where to find this patch?
10" ZT280 H1 3a C91 (512MB+8GB)

ZT280_H1_3a_C91_Android4.0_0222_V1.10 - 900MHz Kernel

#8 g10chy

g10chy

    Newbie

  • Jr. Member
  • Pip
  • 4 posts

Posted 21 February 2012 - 07:51 AM

I have 3a and jitter, when and where to find this patch?


I also have this issue on my 3a. Where can I find the patch?

#9 szaszaTT

szaszaTT

    Newbie

  • Jr. Member
  • Pip
  • 8 posts

Posted 21 February 2012 - 08:20 AM

Hi,

I have the 2n version, I think this series is a fail. Sometimes it works for days, but sometimes the touchscreen doesn't work. The seller doesn't even deal with my problem and with the warranty.

I made a video:



#10 atp_uestc

atp_uestc

    Advanced Member

  • Jr. Member
  • PipPipPip
  • 615 posts

Posted 21 February 2012 - 10:47 PM

3a:
http://www.zenithink...-Patch_0221.rar
remember, if charging jitter, don't use this. this will less performance when charge in.we will continue to improve it.


szaszaTT :
2n just press camera key 5second for calibrate.
omarahum ask me to write below,although i don't know what means:

Liao Dengyan, Zenithink ROM Developer
Email: dyliao@zenithink.com
Have a question for me? Email me the link to your post here on SlateDroid.

#11 HomoSlatiens

HomoSlatiens

    Newbie

  • Jr. Member
  • Pip
  • 9 posts
  • LocationEU

Posted 22 February 2012 - 05:14 AM

if 3a, and jitter, we will offer a patch this days.
if 2n/3n , just calibrate it.

you should check your barcode

Cool! That 'relaxed' my anxious device, reducing double key strokes and having to redo long-presses.

Thanks!
10" ZT280 H1 3a C91 (512MB+8GB)

ZT280_H1_3a_C91_Android4.0_0222_V1.10 - 900MHz Kernel

#12 szaszaTT

szaszaTT

    Newbie

  • Jr. Member
  • Pip
  • 8 posts

Posted 22 February 2012 - 08:52 AM

Is it normal at 2n version to calibrate the screen every 30 minutes?

#13 atp_uestc

atp_uestc

    Advanced Member

  • Jr. Member
  • PipPipPip
  • 615 posts

Posted 22 February 2012 - 08:37 PM

szaszaTT:

no, it 's abnormal. if it need calibrate again again, i think something error.

HomoSlatiens :
forget the download link, please upgrade to the firmware for '3a' pad:
10" C91 (512MB+8GB) android4.0 2012-02-22_3a
omarahum ask me to write below,although i don't know what means:

Liao Dengyan, Zenithink ROM Developer
Email: dyliao@zenithink.com
Have a question for me? Email me the link to your post here on SlateDroid.

#14 HomoSlatiens

HomoSlatiens

    Newbie

  • Jr. Member
  • Pip
  • 9 posts
  • LocationEU

Posted 24 February 2012 - 03:12 AM

szaszaTT:

no, it 's abnormal. if it need calibrate again again, i think something error.

HomoSlatiens :
forget the download link, please upgrade to the firmware for '3a' pad:
10" C91 (512MB+8GB) android4.0 2012-02-22_3a

Thanks for the update atp_uest! I like the screen rotation :-) I do however get a 22px area at the bottom (270) of the screen that does not respond well to touch. I have used the dev tool to show pointer position and it shows high jitter and jumping the cursors around, releasing the press. Please look at this issue. Calibrating does not solve the issue.
I also have slow reaction on the touch button area.

*RESOLVED* Formatted mem card, added freshly compiled 900MHz kernel to build. reflashed and all is well. 4+ hrs usage, no issues so far.

Edited by HomoSlatiens, 24 February 2012 - 12:13 PM.

10" ZT280 H1 3a C91 (512MB+8GB)

ZT280_H1_3a_C91_Android4.0_0222_V1.10 - 900MHz Kernel

#15 DvO

DvO

    Member

  • Jr. Member
  • PipPip
  • 18 posts
  • LocationGermany

Posted 24 February 2012 - 03:11 PM

please upgrade to the firmware for '3a' pad:
10" C91 (512MB+8GB) android4.0 2012-02-22_3a


@atp_uestc,

I upgraded my 3a version tablet to this version, and upgraded the 2n version to the latest 10" C91 (512MB+8GB) android4.0 20120211_2n.
BTW, I consider it a bad idea that the zt-upgrade/command file includes "--wipe_media" as it deletes the internal 8GB flash (/mnt/flash) memory.
In order to keep its contents, I simply commented out the "--wipe_media" before executing the update.

So far the touch screen on both tablets behaves partly okay. Often it misses touches or bounces or is inaccurate (e.g. wrong key),
and the general response is rather delayed. I assume that the latter is due to general performance problems of the ZT-280 C91 :-(

For both new firmwares, using CapTouch apparently has no effect and the logcat contains the error messages I quoted in the first post above.
The same happens using android2.3 20120217_3a and choosing the Touchscreen Calibration from the system settings.
BTW, pressing the camera key for 5 seconds, as some suggested, does not start calibration, but simply the camera.

In the whole, I am not impressed by the new ICS versions (which add some Flash support, but only an outdated version 10.2 and only for the stock browser).
The Gingerbread firmware (2.3.4) is still much more mature.

Edited by DvO, 25 February 2012 - 02:35 AM.


#16 F&LSuperstore

F&LSuperstore

    Advanced Member

  • Authorized Business Seller (ABS)
  • PipPipPip
  • 1,026 posts
  • LocationTampa Bay, FL

Posted 26 February 2012 - 07:50 PM

New ones are 5pt touch by the way.
Posted Image
Frank, President
F&L Superstore - www.flsuperstore.com
email: frank@flsuperstore.com
blog: flsuperstore.wordpress.com
MSN: flsuperstore@gmail.com

#17 windeguy

windeguy

    Member

  • Jr. Member
  • PipPip
  • 25 posts

Posted 08 August 2012 - 10:10 AM

3a:
http://www.zenithink...-Patch_0221.rar
remember, if charging jitter, don't use this. this will less performance when charge in.we will continue to improve it.


I have the bad jitter problem the latest version of ICS (314 I believe) installed on my Zenithink ZT-3290 H1 3a model.

I tried to install this upgrade patch, but the installer is telling me it is skipping those installation files which I downloaded from your link.
The files were unrared into the zt-update folder in the root. Then the unit reboots after a few minutes and I get a blank screen.

Is there anything else that should be in that folder along with the update?