Mirrored touch screen issues. - LG Optimus L9 P760, P765, P768, P769

I know that this issue has yet to be resolved, but I noticed that it is popping up for some of us P769BK users who decided to be 'guinea pigs' by testing the waters of flashing kdz files from various L9 devices, so I figured it would be best to start an actual thread instead of asking in threads not relevant to the question at hand.
I saw a post by Lelus asking an individual if they could give the touch firmware version, which gave me the idea that this is potentially reversible with some time and patience (mainly for my sake since I have one L9 just to mess around with ). The touch firmware version on my daily P769BK is 6, whereas the firmware version on my "play-around" P769BK is firmware 12 after flashing the India kdz file onto it and flashing it back to stock V10G kdz. Any suggestions on where the touch firmware could be located to be pulled from a working L9 and be pushed onto the other via adb after applying the new rooting method?
Just an info note: both of my P769BK are on V10G, one rooted and OTA updated with Voodoo root keeper, the other one stock V10G with mirrored touch issue.
Sent from my LG-P769 using xda app-developers app

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Either v10g kdz doesn't have touch screen firmware update ,or flasher checks version before update and doesn't downgrade I don't think it can be pulled from working phone.
Have you tried flashing your phone with wind 10a http://csmgdl.lgmobile.com/swdata/WDLSW/LGP769/AAWCBK/V11a_00/V11A_00.kdz ?
aequitas3 said:
I know that this issue has yet to be resolved, but I noticed that it is popping up for some of us P769BK users who decided to be 'guinea pigs' by testing the waters of flashing kdz files from various L9 devices, so I figured it would be best to start an actual thread instead of asking in threads not relevant to the question at hand.
I saw a post by Lelus asking an individual if they could give the touch firmware version, which gave me the idea that this is potentially reversible with some time and patience (mainly for my sake since I have one L9 just to mess around with ). The touch firmware version on my daily P769BK is 6, whereas the firmware version on my "play-around" P769BK is firmware 12 after flashing the India kdz file onto it and flashing it back to stock V10G kdz. Any suggestions on where the touch firmware could be located to be pulled from a working L9 and be pushed onto the other via adb after applying the new rooting method?
Just an info note: both of my P769BK are on V10G, one rooted and OTA updated with Voodoo root keeper, the other one stock V10G with mirrored touch issue.
Sent from my LG-P769 using xda app-developers app
Click to expand...
Click to collapse

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Yes I have tried flashing the Canadian V11A kdz and no luck with that one either. The touch screen is still mirrored, but not entirely sure what the firmware version is, if it stays 12 or changes.
Sent from my LG-P769 using xda app-developers app

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When you guys boot is the LG logo mirrored and reverse colored?
---------- Post added at 03:56 PM ---------- Previous post was at 03:50 PM ----------
Maybe if you wipe system with fastboot and then flash kdz?

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No LG logo is normal and not inversely colored. Although I didn't think to wiping system with fastboot and then flashing the kdz, I'll give that a try in a little.
Sent from my LG-P769 using xda app-developers app

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Lelus said:
Either v10g kdz doesn't have touch screen firmware update ,or flasher checks version before update and doesn't downgrade I don't think it can be pulled from working phone.
Have you tried flashing your phone with wind 10a http://csmgdl.lgmobile.com/swdata/WDLSW/LGP769/AAWCBK/V11a_00/V11A_00.kdz ?
Click to expand...
Click to collapse
Yeah i think u r right about the updater not updating the touch screen firmware...because i get to see several parameters errors reoccurring while flashing any kdz....and if there was any way to reflash the touchscreen firmware then maybe the problem would resolve....i think the TS firmware in the v10E is different (if any user could confirm) then is it possible to downgrade to that firmware...as it seems that flashing the Indian kdz has downgraded the TS firmware....sorry had to get my doubts cleared in front of the experts

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I'm pretty sure now that controller module has built-in firmware and it's compiled into kernel. From what I can tell, flashing takes place if the ver present in the EEPROM is at a lower revision than the one embedded into the module.

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Tablechair said:
When you guys boot is the LG logo mirrored and reverse colored?
---------- Post added at 03:56 PM ---------- Previous post was at 03:50 PM ----------
Maybe if you wipe system with fastboot and then flash kdz?
Click to expand...
Click to collapse
The LG logo is mirrored and inverse coloured when flashing from Indian kdz to T-mobile v10G....but after flashing the canadian v11A the mirrored effect of the screen goes away...but the touch mess-up issue remains.
---------- Post added at 06:06 AM ---------- Previous post was at 05:54 AM ----------
Lelus said:
I'm pretty sure now that controller module has built-in firmware and it's compiled into kernel. From what I can tell, flashing takes place if the ver present in the EEPROM is at a lower revision than the one embedded into the module.
Click to expand...
Click to collapse
So does that mean flashing a new kernel(namely v10E) or reflashing the same kernel could install the TS drivers afresh?

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PROgenitor said:
The LG logo is mirrored and inverse coloured when flashing from Indian kdz to T-mobile v10G....but after flashing the canadian v11A the mirrored effect of the screen goes away...but the touch mess-up issue remains.
---------- Post added at 06:06 AM ---------- Previous post was at 05:54 AM ----------
So does that mean flashing a new kernel(namely v10E) or reflashing the same kernel could install the TS drivers afresh?
Click to expand...
Click to collapse
Unfortunately not... a kernel would have to have touch screen firmware v13 or higher and p769v10g is 6 which is probably latest.

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http://forum.xda-developers.com/showpost.php?p=39268215&postcount=24
I'm pretty sure this won't work and can be damaging , but if someone is willing to give it a try:
Unzip 19.bin (which is just 10k of 00's) to sdcard
On a rooted phone with proper stock rom
$ adb shell
$ su
$ echo 1 /sdcard/external_sd/19.bin > /sys/devices/virtual/input/lge_touch/firmware
Reboot phone
Again , there is possibility of damaging your device.

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I'll give it a try after testing the wiping of /system via flashboot doesn't do any good lol
Sent from my LG-P769 using xda app-developers app

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Anyone give a try? I would but im kinda poor and this is my only phone.

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Lelus said:
I'm pretty sure this won't work and can be damaging , but if someone is willing to give it a try:
Unzip 19.bin (which is just 10k of 00's) to sdcard
On a rooted phone with proper stock rom
$ adb shell
$ su
$ echo 1 /sdcard/external_sd/19.bin > /sys/devices/virtual/input/lge_touch/firmware
Reboot phone
Again , there is possibility of damaging your device.
Click to expand...
Click to collapse
I just saw the 19.bin file and as told by you, its 10kilobytes of just Null characters (Hex Code 00).
Are you replacing file with name "firmware" and size only 89bytes with a file of 10000bytes? The file "firmware" actually is a text file which holds only firmware version number. Will this work? Anyone tried?
Doesnt KDZ flashing replaces this file too?

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PROgenitor: Have you tried flashing the T-Mobile P769 10G KDZ? If you have not, try this first. Use the instructions posted by cmahendra for gaining root via KDZ flash.
But before doing this, may we have the output from these commands first?
adb shell
su -
lsmod
uname -a
ls -la /sys/devices/omapdss/display0/driver
Here is my output.
Code:
[email protected]:/ # lsmod
lsmod
bcmdhd 410031 0 - Live 0xbf053000
omaplfb_sgx540_120 19252 0 - Live 0xbf04a000
pvrsrvkm_sgx540_120 259245 77 omaplfb_sgx540_120, Live 0xbf000000
[email protected]:/ #
[email protected]:/ # uname -a
uname -a
Linux localhost 3.0.21 #1 SMP PREEMPT Wed Jan 9 16:40:29 KST 2013 armv7l GNU/Lin
ux
[email protected]:/ #
ls -la /sys/devices/omapdss/display0/driver
[email protected]:/sys/devices/omapdss/display0 # ls -la /sys/devices/omapdss/display
0/driver
es/omapdss/display0/driver <
lrwxrwxrwx root root 2013-03-11 00:47 driver -> ../../../bus/om
apdss/drivers/tx11d108vm_panel
[email protected]:/sys/devices/omapdss/display0 #
I am wondering if you have a different kernel, or just a different module. It could still be an init script issue.Would you also be able to share a CWM backup before flashing the KDZ so that I can compare?

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kevev said:
PROgenitor: Have you tried flashing the T-Mobile P769 10G KDZ? If you have not, try this first. Use the instructions posted by cmahendra for gaining root via KDZ flash.
But before doing this, may we have the output from these commands first?
adb shell
su -
lsmod
uname -a
ls -la /sys/devices/omapdss/display0/driver
Here is my output.
Code:
[email protected]:/ # lsmod
lsmod
bcmdhd 410031 0 - Live 0xbf053000
omaplfb_sgx540_120 19252 0 - Live 0xbf04a000
pvrsrvkm_sgx540_120 259245 77 omaplfb_sgx540_120, Live 0xbf000000
[email protected]:/ #
[email protected]:/ # uname -a
uname -a
Linux localhost 3.0.21 #1 SMP PREEMPT Wed Jan 9 16:40:29 KST 2013 armv7l GNU/Lin
ux
[email protected]:/ #
ls -la /sys/devices/omapdss/display0/driver
[email protected]:/sys/devices/omapdss/display0 # ls -la /sys/devices/omapdss/display
0/driver
es/omapdss/display0/driver <
lrwxrwxrwx root root 2013-03-11 00:47 driver -> ../../../bus/om
apdss/drivers/tx11d108vm_panel
[email protected]:/sys/devices/omapdss/display0 #
I am wondering if you have a different kernel, or just a different module. It could still be an init script issue.Would you also be able to share a CWM backup before flashing the KDZ so that I can compare?
Click to expand...
Click to collapse
there isn't module for the touch screen, it's statically compiled into kernel

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Lelus said:
there isn't module for the touch screen, it's statically compiled into kernel
Click to expand...
Click to collapse
I see.

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kevev said:
PROgenitor: Have you tried flashing the T-Mobile P769 10G KDZ? If you have not, try this first. Use the instructions posted by cmahendra for gaining root via KDZ flash.
But before doing this, may we have the output from these commands first?
adb shell
su -
lsmod
uname -a
ls -la /sys/devices/omapdss/display0/driver
I am wondering if you have a different kernel, or just a different module. It could still be an init script issue.Would you also be able to share a CWM backup before flashing the KDZ so that I can compare?
Click to expand...
Click to collapse
I have tried flashing P769 V10G(T-mobile) and V11A Canada(Wind) several times after the issue....but no success...so i flashed the P765 V10C(India) and gained root and installed CWM recovery.....Then via recovery i restored a CWM backup of a rooted P769 V10G(from cmahendra's post)....I am currently on that....i will just try and give you the output.
My Output:
C:\Root\stuff>adb shell
[email protected]:/ $ su -
su -
[email protected]:/ # lsmod
lsmod
bcmdhd 410031 0 - Live 0xbf053000
omaplfb_sgx540_120 19252 0 - Live 0xbf04a000
pvrsrvkm_sgx540_120 259245 67 omaplfb_sgx540_120, Live 0xbf000000
[email protected]:/ # uname -a
uname -a
sh: uname: not found
127|[email protected]:/ # ls -la /sys/devices/omapdss/display0/driver
ls -la /sys/devices/omapdss/display0/driver
lrwxrwxrwx root root 2013-03-12 13:22 driver -> ../../../bus/om
apdss/drivers/tx11d108vm_panel
[email protected]:/ #
Click to expand...
Click to collapse

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PROgenitor said:
I have tried flashing P769 V10G(T-mobile) and V11A Canada(Wind) several times after the issue....but no success...so i flashed the P765 V10C(India) and gained root and installed CWM recovery.....Then via recovery i restored a CWM backup of a rooted P769 V10G(from cmahendra's post)....I am currently on that....i will just try and give you the output.
My Output:
Click to expand...
Click to collapse
Does this mean, you have not yet tried LELUS method alongwith direct flashing of P769V10G or P769V11A?
If not yet done, try that with HARDRESET to phone before and after the flashing with Lelus root. :good: Good luck.

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Could someone with a phone other then p769 check their touchscreen firmware version.

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Lelus said:
Could someone with a phone other then p769 check their touchscreen firmware version.
Click to expand...
Click to collapse
P765 V10G India , Touch Firmware Version: 12.
EDIT:
3845#*765# ---> H/W Device Test --->Touch Test --->Touch Firmware Version : 12
P765: IPS Display
P769: Corning Gorilla Glass