touch screen is vertically and horizontal inverted and offset. Calibration would not work.

[Brian Lau]

Hi, 

After installing Android x86, the touch screen is vertically and horizontal inverted and offset. Calibration would solve the problem.

Is there any way to adjust the offset ad inverted manually ?

[NovHak]

You mean the display is inverted, or only the input, i.e. a tap on the bottom of the screen is considered a tap on the top ? Because if it's a display problem, that's another story. As for the input problem, I think it can be solved by modifying the IDC file for your device, or creating one. The system IDC files are in /system/usr/idc. You can see the name of your touch screen with the "getevent -p" command (as root). The IDC file should have the same name as your device, with ".idc" at the end, and spaces and special characters replaced by an underscore "_" character. More info here. There are info about touch screen specific properties in relevant sections of the documentation.

[Brian Lau]

The display is fine and just the touch screen not function as it is inverted and offset.

I used the command "getevent -p" and found the input device is "SileadT GSLx680 Touchscreen.

But i can't find the corresponding idc file from /system/usr/idc

So, i need to create one and adjust the offset and invertion ?


Brian Lau於 2020年4月6日星期一 UTC+8下午12時03分01秒寫道：

[NovHak]

I don't know precisely which parameters should be used, and how, but you will find a description of the touch screen specific properties in the touch screen section of the documentation I pointed you to, starting from the "Basic Configuration" paragraph. Btw, maybe someone did make an IDC for your device already. That being said, there's another possibility, maybe a driver option would solve this. You should find the module name in a list from the lsmod command, and check a description of the module parameters with "modinfo <module_name>".

I don't know if it will help since it's rather old, but I found this.

Hope this helps !

[Grey Christoforo]

Brian,
Have you tried the touch screen calibration app included in the image?
Its icon is a red target.
Cheers,
¬grey

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[Chih-Wei Huang]

Brian Lau <knig...@gmail.com> 於 2020年4月7日 週二 下午3:09寫道：

>
> The display is fine and just the touch screen not function as it is inverted and offset.
>
> I used the command "getevent -p" and found the input device is "SileadT GSLx680 Touchscreen.
> But i can't find the corresponding idc file from /system/usr/idc
>
> So, i need to create one and adjust the offset and invertion ?

Please read:

https://groups.google.com/d/msg/android-x86/G65d_w72a48/BmqgDeceAwAJ


--
Chih-Wei
Android-x86 project
http://www.android-x86.org

[Brian Lau]

Hi Chih-Wei Huang,

I have run the commands and the calibration apps still cannot solve the problem as i tap on the red spot and no repsonse.

From the point location of dev tools. It is found that the point i tap is offset quite far away. i.e. I touch the right top side is actually the center of the screen.

Chih-Wei Huang於 2020年4月10日星期五 UTC+8下午3時15分31秒寫道：

[Chih-Wei Huang]

Brian Lau <knig...@gmail.com> 於 2020年4月10日 週五 下午5:31寫道：

>
> Hi Chih-Wei Huang,
>
> I have run the commands and the calibration apps still cannot solve the problem as i tap on the red spot and no repsonse.

Use 'getevent -l' to check the response.

If there are some areas that have no response,
the driver is broken and it could not be fixed by calibration.

> From the point location of dev tools. It is found that the point i tap is offset quite far away. i.e. I touch the right top side is actually the center of the screen.

Have you checked the file /data/misc/tscal/pointercal?
It should contains 7 numbers after you run the calibration app.

[Brian Lau]

HI Hunag,

by using "getevent -l", some area reported ABS_X and ABS_Y. Some areas do not report abs_x and abs_y.

  
There are eight values in /data/misc/tscal/pointercal

49764 -377305 169088453 1123 390746 -175327626 65536 640 362

Chih-Wei Huang於 2020年4月10日星期五 UTC+8下午5時54分17秒寫道：