[KERNEL][MOD] Increase Touchscreen Sensitivity 4.2.2

reddv1

Senior Member
Sep 16, 2009
732
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Torrance, CA
4.2.2 Any Rom CWR flashable zip:
e015-AnyRom-4.2.2-v1.zip
-Downgraded touchscreen firmware to e015
-Enable loading of modules
4.2.2 Any Rom CWR flashable zip: (2/23/2013)
Latest e015-hsic-AnyRom-4.2.2-v2.1.zip
e015-hsic-AnyRom-4.2.2-v1.zip
-Downgraded touchscreen firmware to e015
-Enable loading of modules
-msm_hsic_host wakelock fix thracemerin

4.2.1 Any Rom CWR flashable zip:
e015-AnyRom-
4.2.1*http://goo.gl/BgiZz
-Downgraded touchscreen firmware to e015

Matt at http://code.google.com/p/android/issues/detail?id=40445 figured how to downgrade the touch firmware to a previous version, which had better sensitivity. But it won't stick after a reboot, so I compiled a custom kernel with the downgraded touch firmware.

Here's how to make it stick after a reboot. This requires a my custom kernel and also to manually downgrade the touch driver once using terminal or adb.

This will downgrade your touch firmware from E027 to E015.

First, flash my kernel, download links listed above. .

Second, after flashing the flashing the kernel and rebooting, download this file SynaImage.E015.bin*http://goo.gl/4vzd4 and place on the root of the sdcard.
Then open terminal or adb and request root permission.
Then type the following command "echo 1 /sdcard/SynaImage.E015.bin > /sys/devices/virtual/input/lge_touch/firmware"
The screen will not be responsive to touch for a few seconds as the firmware is downgraded.

To check if it downgraded successfully, run this in terminal "cat /sys/devices/virtual/input/lge_touch/fw_ver" you should get "E015" as a response. Try this after rebooting to see if it sticks.

Your done! Now you have a nice sensitive touchscreen.

Credit goes to Matt who figured out how to downgrade the touch firmware here http://code.google.com/p/android/issues/detail?id=40445, comment 42.

This is totally reversible, just flash any kernel or booting into recovery, and the original firmware will update automatically.
CWR Touch will revert the the touch firmware, therefore the touchscreen will be non-responsive for a few seconds when you first boot into recovery, you can use the volume buttons and power button until the touchscreen is responsive again. .

Kernel Source: github.com/reddv1/msm.git
Here's another method to downgrade the touch firmware
Better: http://forum.xda-developers.com/showthread.php?t=2163924
http://forum.xda-developers.com/showthread.php?t=2028289

Sent from my Nexus 4 using Tapatalk 2
 
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3dawg

Senior Member
Oct 22, 2010
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I suggest you make a bigger deal out of the no touch CWM. People are going to miss that and then complain incessantly when they realise.
 
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lnfound

Senior Member
Jun 6, 2012
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Hopefully kernel devs incorporate this. Any ideas if TWRP is borked too? I'm not sure if it has anything but touch options.

Sent from my Nexus 4 using Tapatalk 2
 
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reddv1

Senior Member
Sep 16, 2009
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Torrance, CA
Hopefully kernel devs incorporate this. Any ideas if TWRP is borked too? I'm not sure if it has anything but touch options.

Sent from my Nexus 4 using Tapatalk 2
Yeah touch won't work with TWRP either. I can always compile the recoveries with the downgraded touch firmware and that will fix touch in them.

Sent from my Nexus 7 using Tapatalk 2
 
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reddv1

Senior Member
Sep 16, 2009
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Torrance, CA
Everyone incoporate this into your Kernel's NOW :mad:, yes you Faux!

Great find :p, I might test tonight.
Yeah, they should include it because it doesn't downgrade the touch firmware, unless you downgrade it manually it just helps it stick. And reflashing the same kernel or any kernel will reverse it automatically. Everyone wins.

This option is nice to have until Google or LG update the firmware themselves.

Sent from my Nexus 4 using Tapatalk 2
 

mrjeffery

Senior Member
Dec 3, 2005
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Yeah, they should include it because it doesn't downgrade the touch firmware, unless you downgrade it manually it just helps it stick. And reflashing the same kernel or any kernel will reverse it automatically. Everyone wins.

This option is nice to have until Google or LG update the firmware themselves.

Sent from my Nexus 4 using Tapatalk 2
You are the man! Thankyou so much, this is something that has irked me from day 1. Thanks again!!!
 

Leandros_Ger

Senior Member
Sep 13, 2010
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arvid-g.de
Has anyone actually tested this?
Yep! I subscribed the issue and applied the fix directly after it was posted. :p

I love it! Please Google / LG, fix the "ghost touch" issue without making the screen less sensitive.

@Faux: Include it in your Kernel! ;)

@AlwaysDroid / Apfelschale: PRS is the same though, but the sensivity is better. I tested it today in my daily routine.
 
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DarkRyoushii

Senior Member
Jan 23, 2011
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Melbourne
this looks promising but I'll probably wait until motley or faux include it in their kernels. Currently running motley since I'm getting this phone RMA'd and wanted to try all the kernels and like it a lot so I don't want to give up those features for a slightly more sensitive screen.
 

lnfound

Senior Member
Jun 6, 2012
405
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Tried it, nothing really changed for me, still around 0.5/0.6
Hasn't changed for anyone, I think prs reading having any substance has been debunked. Some readings saying improvement with no difference in prs reading are in the other thread.

Sent from my Nexus 4 using Tapatalk 2
 

Leandros_Ger

Senior Member
Sep 13, 2010
190
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arvid-g.de
this looks promising but I'll probably wait until motley or faux include it in their kernels. Currently running motley since I'm getting this phone RMA'd and wanted to try all the kernels and like it a lot so I don't want to give up those features for a slightly more sensitive screen.
You don't have to include it in the kernel, just replace the old one and test it. It'll be gone after a reboot.
Everything you need is described here: http://code.google.com/p/android/issues/detail?id=40445#c42