[FIX] Increase touch screen sensitivity - Sony Xperia P, U, Sola, Go

hello guys.
i'm going to share with you guys how you can make the touch screen more responsive on the Xperia U.
please note:- this may work on other devices but is not tested
please note2:- This requires a rooted device and read write access to the system folder.
please note3:- i am NOT responseable for ANY damage caused to your device in any way, by rooting your device you have voided your warrenty and taken the next few steps on your own head
ok as you know the touch screen is really buggy and this is because of the cheap touch screen they have used.
you have 2 ways of fixing it
1. send your device to sony and they will replace the screen (i have heard this has fixed the problem for many users)
or
2. try this fix
the fix goes like this
1. get root ---> check this link to find out how --> http://forum.xda-developers.com/showthread.php?t=1933985
2. install root browser from android market or es file explorer (for es file explorer you will need to activate root via the app's settings)
3. navigate to /system/usr/idc
4. backup the file named "synaptics_rmi4_i2c.idc"
5. next open the above file (not the backup you just made)
6. edit these lines
touch.size.scale= 20
touch.size.bias = 70
touch.pressure.scale= 5
(before they was
touch.size.scale= 10
touch.size.bias = 0
touch.pressure.scale= 0.005)
7. save and reboot your device
if the above changes still didnt work just increase the values but the above values are optimal
and your done!
if this helped please give the post a thanks any problems let me know, i'll be glad to help you out
p.s. if this is in the wrong section please let me know i did think hard to where this fitted in the most and since it meant changing system values i thought it best go here

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wow! very helpful info man..

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I have never had such an issue...In case I mod this on my Xperia U what will happen? I'll have a problem or what? Sorry for spamming

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Can I edit this file using es file explorer ?
Sent from my Xperia U using xda app-developers app

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kwstas 13 said:
I have never had such an issue...In case I mod this on my Xperia U what will happen? I'll have a problem or what? Sorry for spamming
Click to expand...
Click to collapse
No nothing will happen!!
I tried on stock jb!!
blackassassin3333 said:
Can I edit this file using es file explorer ?
Sent from my Xperia U using xda app-developers app
Click to expand...
Click to collapse
Try root explorer
Mount sys as r/w
Sent from my ST25i using Tapatalk

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blackassassin3333 said:
Can I edit this file using es file explorer ?
Sent from my Xperia U using xda app-developers app
Click to expand...
Click to collapse
Yes. That's what i did.

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Too bad i have an area of touchscreen non working (the area around the C key in keyboard )
I miss xperia U so much !!
Sent from my Xperia Sola using xda app-developers app

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blackassassin3333 said:
Can I edit this file using es file explorer ?
Sent from my Xperia U using xda app-developers app
Click to expand...
Click to collapse
yes you can just open es file explorer, press the menu key, go into settings, then scroll down to where you see root options, then select root explorer and mount system R/W

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Why all this? The touchscreen works fine.
Sent from my ST25i using xda app-developers app

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Any way to do that on GB roms? That file is only on ICS roms..

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NeriL said:
Any way to do that on GB roms? That file is only on ICS roms..
Click to expand...
Click to collapse
i'm afraid not mate, i to be honest wasn't aware the file wasn't there in GB

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man? are you insane? its posible ...fix only replacment touchscreen hardware... am just smile to see your post...jajajajajaja

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Encang_Rojali said:
man? are you insane? its posible ...fix only replacment touchscreen hardware... am just smile to see your post...jajajajajaja
Click to expand...
Click to collapse
No hay necesidad de ser grosero..
Por cierto, "jaja" el inglés es "haha"
Sent from NeriL.device using NeriL.preferredApp

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NeriL said:
No hay necesidad de ser grosero..
Por cierto, "jaja" el inglés es "haha"
Sent from NeriL.device using NeriL.preferredApp
Click to expand...
Click to collapse
En inglés también
Translated from previous post:
There's no need of being rude.
By the way, "jaja" in English is "haha"

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NeriL said:
Any way to do that on GB roms? That file is only on ICS roms..
Click to expand...
Click to collapse
Because .idc files support was just added in 4.0.
Input calibration, like at all, should have been already there in 2.3 though (and in fact you can find the same configs in libui.so)
I'm not sure they can be externally overridden, unless you tinker with kernel events. In build.prop maybe we trust?
Also, notice touchscreen controller is just a part of the equation.
And also also, it smells really fishy that ours and gnex's are configured the same.