yashsingh1/xdaforums huggingface dataset:
[LG Optimus 4X HD] streambinder:
Maybe no one will care about that, but... this seems to be the first photo token with a LG 4X HD running AOSP Lollipop! :)
[LG Optimus 4X HD] Jack_capvil:
It is the interesting proof that it will work soon for us. I am waiting the next build☺
[LG Optimus 4X HD] streambinder:
It seems it will come soon, mate! ;)

Expect a package your recovery will install in 15s, at max!

For the ones who are experiencing RIL issue (such as outgoing calls bug), can you please try to edit /system/etc/build.prop file, commenting out this string: ro.telephony.ril_class=X3RIL?
[LG Optimus 4X HD] CrazyWinner:
I created a zip for new apps except messaging :) You can download from here and flash

https://mega.co.nz/#!kQ50AQrZ!BnGTmii17mRtQmd8yyCyC4OvuPRJuAdPy0vcFZbBnMM

it includes:

download provider ui

Google calendar

browser

gallery

documentsui

calculator
[LG Optimus 4X HD] SpyKnife:
Is camera working fully? Can you test QR code scanning, video, panorama and photosphere?
[LG Optimus 4X HD] streambinder:
Everything seems to work correctly, except for the green preview.

At the moment it's not a prio, though, as essential functionalities are working.

The most important thing I'm waiting for is the report of the tests I suggested to the ones who're experiencing issues with RIL.

---------- Post added at 02:06 PM ---------- Previous post was at 01:24 PM ----------

Anyway, confirmed. Here's what you'll have in next build:

Fixed Camera

Fixed NFC

Package quickly installable (no more 3m while flashing)
[LG Optimus 4X HD] m.heydari2016:
That would be great, Thanks for ur work. We're eagerly waitin for next release.

About recent apps panel, if I close every app, next time there would be another one!

(seems in recent apps panel usually some apps left behind! and doesn,t show all opened apps)

i had this problem on Euphoria, too. If u need log or sth, i'll be happy to do it.
[LG Optimus 4X HD] streambinder:
Build is uploading...
[LG Optimus 4X HD] xperia u20i:
Think that i will be able to test in next few hours... :good:

---------- Post added at 03:54 PM ---------- Previous post was at 03:49 PM ----------

Is that string inside build.prop that you recommend already included inside todays build?
[LG Optimus 4X HD] CrazyWinner:
Wow so fast :D waiting ...
[LG Optimus 4X HD] streambinder:
New build is up! Enjoy. :)

Nope, it won't be included.
[LG Optimus 4X HD] Streetdragon:
Data is working but i cant do a call. After i entered the number, the call closed itself, like i canceled the call/pushed the red button.

If i enter now the recovery, i get the dead android. Cant instann gapps or something else.
[LG Optimus 4X HD] streambinder:
Read above:
[LG Optimus 4X HD] kreatonn:
Just install this, work great. No bugs except camera fc. No problem with outgoing calls. Still testing, will report again. Note : no gapps flashed, will report after gapps flashed. And does root gone?
[LG Optimus 4X HD] Sk0rpi0n89:
See this for root.
[LG Optimus 4X HD] Streetdragon:
I cant enter the Recovery! i have this red triangele!! Pls need help to fix that! I have no root permisions in AOSP. now i cant install the recovery out of android.
[LG Optimus 4X HD] kreatonn:
Thanks, im thinking to do so too.
[LG Optimus 4X HD] InterrtuptoR:
U can try euphoria 5.1, its with stock blobs.
[LG Optimus 4X HD] AndreaFar:
You know if with Euphoria ROM all features and sensors and features(eg light sensor, NFC, GPS, compass etc.) are fully working? I prefer this pure Android ROM but without camera scan features usable I can consider to use Euphoria.
[LG Optimus 4X HD] InterrtuptoR:
to be fair i didnt try all those features, i just know scanner works for sure, alfasmug also released cm13 with stock blobs, so u can try that too... im curently on stock so i cant help u more...

U just have to download qr scanner app for euphoria...
[LG Optimus 4X HD] Efimera:
problem

excuse my bad English , everything is going perfect but sometimes I fail calls and messages. They arrive or depart not. a way to fix it?
[LG Optimus 4X HD] bomblader:
I also have the same problem. Anyone knows how to fix this?
[LG Optimus 4X HD] csk1jw:
This is not a definite fix but worth to try out. Replace 2 files below from LG stock JB ROM from euro-open v20c.

/bin/rild
/lib/lge-ril.so

Your device *MUST* be flashed with euro-open V20C_00.KDZ prior to flashing this Lollipop ROM.

I will provide the files later for those who can't extract them out from LG KDZ.

d7ff3ed3b6abcf9f81b3503138d17dcd lge-ril.so
074d550d6490025b2e7a722d1155bcd7 rild

These files should be updated in recovery with their permission set properly.

$ adb mount /system
$ adb push rild /system/bin/
$ adb chmod 755 /system/bin/rild
$ adb push lge-ril.so /system/lib/
$ adb chmod 644 /system/lib/lge-ril.so

These files were once pristine as in LG stock v20c JB ROM. Somehow, rild was updated from Tegra4 version and lge-ril.so was binary patched. I think it is best to test with the stocked version.
[LG Optimus 4X HD] Siauka:
Can someone explain me please, if stock blobs are more efficient for our device, why developers not using it in every rom or at least in any unofficial rom?
[LG Optimus 4X HD] InterrtuptoR:
Stock blobs are more reliable and stable, working... Non stock blobs can be newer and better in performance, but lack compatability with our device (cause they are from newer devices with similar hardware)...

That is all i can tell u on the subject... A real dev will be needed for more...

Послато са LG-P880 уз помоћ Тапатока
[LG Optimus 4X HD] Legion69:
Im on Euphoria now, everything U mean is working (except compass frozen after update to newest ROM version - but this is probably related to messed GAPPS on my device).
[LG Optimus 4X HD] pokeguy4:
NO SIGNAL

after turning off airplane mode i don't seem to get a cellular signal anymore only way to fix it is rebooting the phone
[LG Optimus 4X HD] csk1jw:
I hope you are not referring to Euphoria ROM. This ROM does not have the issue you described for airplane mode.
[LG Optimus 4X HD] csk1jw:
I am sharing my build in AFH.

https://www.androidfilehost.com/?fid=24459283995306148

Changelog

- Android-5.1.1_r35 LMY49H

- Default I/O scheduler - deadline

- More recent kernel F2FS support from Moto G - only if you use it.

- Default fsync disabled

- Moto G lowmemorykiller enhancement

- Sync up/revert some blobs to LG JB V20C euro-open

- Tethering works - both BT and WiFi

WiFi MAC address

Please modify bcmdhd.cal to inject your own unique MAC address from your device.

Issues

- Intermittent RIL mal-function, this is the most frustrating issue. No sign of failure. Incoming calls enters voicemail immediately and outgoing call ended immediately. Cellular data won't connect. Logs for debug is welcome.

- As with grouper blobs, QR/BAR code scanning does not work

Use at your own risk.
[LG Optimus 4X HD] csk1jw:
New build uploaded to AFH.

https://www.androidfilehost.com/?w=files&flid=52898

Changelog

- Android-5.1.1_r37 (LMY49J)

- CVE-2015-1085: backported AOSP kernel-3.4 fix. Patch attached.
[LG Optimus 4X HD] CrazyWinner:
If anyone getting "Google play services has stopped" error at last version, just download and install "android system webview".
[LG Optimus 4X HD] csk1jw:
Oh I forgot to mention that the ROMs I shared are hard coded to use "Android System Webview". Please get it from Deltadroid's modular gapps and install it from recovery.
[LG Optimus 4X HD] InterrtuptoR:
can u make aosp with stock blobs?
[LG Optimus 4X HD] csk1jw:
It is not as simple as direct replacement. I don't have the know-how to do that yet.
[LG Optimus 4X HD] Mentah:
So do calls work in your latest build? [MENTION=5799877]csk1jw[/MENTION] or do we need to wait for a patch?
[LG Optimus 4X HD] csk1jw:
Yes, so far.

Need users to report ROM issues if any.
[LG Optimus 4X HD] Mentah:
Allright! I'll give the rom a try tomorrow and give feedback.
[LG Optimus 4X HD] csk1jw:
I think I may have discovered the RIL issues with this ROM. The vendor RIL subclass X3RIL.java in the device tree is not being used at all because AOSP source code does not check system properties ro.telephony.ril_class to instance the RIL class. I ported the code from CyanogenMod. In addition, I also fixed a missing symbols from libbinder.so which causes dlopen to fail on liblgdrm.so which is used by lge-ril.so

I am attaching the files for people comfortable with adb to test and report. I will update the ROM shortly.

You need to patch the ROM from recovery. You must be using my latest ROM from AFH.

$ adb shell mount /system
$ adb push telephony-common.jar /system/framework/
$ adb push libbinder.so /system/lib/
$ adb shell chmod 644 /system/framework/telephony-common.jar
$ adb shell chmod 644 /system/lib/libbinder.so

To report issue, please provide RIL log using adb logcat as below

$ adb logcat -b radio -v time -d > ril.log

[MENTION=5889675]streambinder[/MENTION] will you take the patch to update the device tree for MMB?
[LG Optimus 4X HD] streambinder:
Of course I will, as promised.
[LG Optimus 4X HD] csk1jw:
For [MENTION=5889675]streambinder[/MENTION].

Here's the updates for MMB aosp-lp platform_device_lge_p880 tree.

patches/frameworks_native/0006-binder-Fix-dlopen-failed-in-liblgdrm.so.patch
patches/frameworks_opt_telephony/0005-framework-opt-telephony-RIL-make-RIL-subclassable.patch
ril/telephony/java/com/android/internal/telephony/X3RIL.java
[LG Optimus 4X HD] csk1jw:
New ROM uploaded

Hi, new ROM build uploaded to AFH.

https://www.androidfilehost.com/?fid=24499762636003324

- Same Android-5.1.1_r37 (LMY49J) I deleted the old file.

- Hopefully, this fixed the RIL issues.

Please report back any RIL issue with logs to help perfecting this ROM.
[LG Optimus 4X HD] csk1jw:
kernel update - AOSP Marshmallow

[MENTION=1149134]Demetris[/MENTION], [MENTION=5889675]streambinder[/MENTION].

Attach the CM-12.1 kernel update for AOSP Marshmallow. It is based off the wonderful work from [MENTION=3326402]dmitrygr[/MENTION] - AOSP 6.0 for grouper.

I have tested and it booted on AOSP-5.1.1 ROM.
[LG Optimus 4X HD] InterrtuptoR:
What is the change, what is better?
[LG Optimus 4X HD] csk1jw:
This is meant for AOSP Marshmallow/CM-13 bringup.
[LG Optimus 4X HD] csk1jw:
New build!

I updated another new build for Lollipop ROM to AFH.

https://www.androidfilehost.com/?fid=24499762636007212

All old files are removed.

- Android-5.1.1_r37 (LMY49J)

- Fixed missing ANDROID_CACHE env vars

- SELinux policy clean-up. Enforcing works.

- Fixed nvcpud failed due to another missing symbol in libbinder.so

The ROM is still default to SELinux permissible. To enable SELinux enforced, create an empty file in /data/media named ".selinux" after flashing the ROM from recovery.

$ adb shell mount /data
$ adb shell touch /data/media/.selinux
$ adb reboot

You are free to remove the file and reboot to revert back to SELinux permissible. You are free to check out the behaviors on SELinux Enforced vs Permissible.

Update: patches attached.
[LG Optimus 4X HD] DavidXanatos:
Has anyone of you got RealVNC viever to work?

Or ssh/sftp server?

For me on the vnc client crashes, and when i try to connect to the server it fails :/

Did I do something wrong when updating or is that a known issue?
[LG Optimus 4X HD] Mentah:
What gapps package are you guys using with this rom? For me open gapps don't work and delta gapps give me an error while flashing.
[LG Optimus 4X HD] CrazyWinner:
OpenGapps, if you get "Google services has stopped" error ,just download and install "Android system webview"
[LG Optimus 4X HD] Mentah:
I allready tried open gapps. The flashing process goes fine but after the rom reboots i have no gapps installed. Clean installs everytime.
[LG Optimus 4X HD] csk1jw:
Marshmallow booted!

Finally, after days of debugging init issues, I got AOSP Marshmallow booted on LG-P880. It is from Android-6.0.1_r20. (MMB29X)

Still a long way to get it up at the same functionality level as Lollipop-5.1.1.
[LG Optimus 4X HD] CrazyWinner:
Great new ! Are bluetooth and wi-fi working correctly ?
[LG Optimus 4X HD] csk1jw:
Audio is not fully functional. I got ACodec error for audio/vorbis from logcat. RIL is also broken now. BT/Wifi look fine but cannot test until audio issues are resolved.
[LG Optimus 4X HD] streambinder:
Thank you, dude.

I just updated sources along with your changes.

Keep up the good work, mate! :good:
[LG Optimus 4X HD] csk1jw:
AOSP Marshmallow update

Update:

- Audio System is up using AudioWrapper.

- Camera is up - both Photo and Video with CameraWrapper.

- Stagefright OMX for audio/video HW acceleration

- Youtube video/audio playback

Now, start to look into RIL then we will have AOSP Marshmallow ROM for our device.;)
[LG Optimus 4X HD] Shadowghoster:
Tbh I'm not using my p880 anymore because the audio sink is broken but it's just amazing how you all still put efforts in it. Keep up this good work!
[LG Optimus 4X HD] csk1jw:
RIL update

For Lollipop-5.1.1, I was able to to get RIL working with exactly the same RIL blobs as LG v20c euro-open ROM.

/system/bin/rild
/system/lib/libril.so
/system/lib/lge-ril.so

The X3RIL java class does not matter here as the source is available and easily customized if required. I thought RIL was a confined domain which should be easier to manage, but I think I am stumbled. The same setup on Lollipop-5.1.1 now get SIGSEGV in lge-ril.so upon getting the 1st UNSOL message.

Analyzing CM-13 ROM from [MENTION=3081601]alfsamsung[/MENTION], lge-ril.so and libril.so are original from LG v20c blobs, but rild seems to be compiled from source.

[MENTION=3081601]alfsamsung[/MENTION], would you be able to share your ingredients of getting RIL to work? This is the last hurdle before I release the AOSP Marshmallow ROM for P880 xda community

I almost wanted to give up on porting Marshmallow after spending nights and nights looking into init and Audio/Video/OMX issues. And I was so excited that I finally nailed them down. I don't want to give up now.

Please help if you can.
[LG Optimus 4X HD] alfsamsung:
Sounds like you have some missing symbols for libril. It's not so easy without source and logs, but do you have this? On aosp you need to preload this lib like this. Hope this helps.
[LG Optimus 4X HD] csk1jw:
Instead of using LD_PRELOAD, I have implemented all the missing symbols by patching AOSP sources to place them in the relevant libraries, similar to how they were done for Lollipop-5.1.1. CM bionic linker has special LD_SHIM_LIBS which is not available on AOSP.

I am getting the same SIGSEGV every time, with the same stack backtrace when RILD was restarted after it crashed. Tracing the backtrace in lge-ril.so shows that it could be coming from handling unsolicited response UNSOL_RADIO_STATE_CHANGED, which is always the 1st UNSOL from both Lollipop and Marshmallow radio log. And this happens very early during boot, RILD crashed and restarted at least 3-4 times before the RIL java class is alive.

05-07 22:37:19.485 1147 1158 F libc : Fatal signal 11 (SIGSEGV), code 1, fault addr 0x0 in tid 1158 (rild)
05-07 22:37:19.606 214 214 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
05-07 22:37:19.606 214 214 F DEBUG : Revision: '0'
05-07 22:37:19.606 214 214 F DEBUG : ABI: 'arm'
05-07 22:37:19.606 214 214 F DEBUG : pid: 1147, tid: 1158, name: rild >>> /system/bin/rild <<<
05-07 22:37:19.606 214 214 F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0
05-07 22:37:19.615 214 214 F DEBUG : r0 405b67a8 r1 4047c4b8 r2 00000008 r3 0000007f
05-07 22:37:19.615 214 214 F DEBUG : r4 00000000 r5 404b61a4 r6 00000001 r7 00000000
05-07 22:37:19.616 214 214 F DEBUG : r8 4016beb0 r9 40175e50 sl 40175e08 fp 40175e28
05-07 22:37:19.616 214 214 F DEBUG : ip 4047c018 sp 405b67f8 lr 40234a13 pc 4049c9b6 cpsr 800e0030
05-07 22:37:19.638 214 214 F DEBUG :
05-07 22:37:19.638 214 214 F DEBUG : backtrace:
05-07 22:37:19.639 214 214 F DEBUG : #00 pc 0001c9b6 /system/lib/lge-ril.so (setRadioState+93)
05-07 22:37:19.639 214 214 F DEBUG : #01 pc 0000c57b /system/lib/lge-ril.so
05-07 22:37:19.639 214 214 F DEBUG : #02 pc 00002f29 /system/lib/libril.so
05-07 22:37:19.639 214 214 F DEBUG : #03 pc 0000b4fd /system/lib/libril.so (_Z14ril_event_loopv+456)
05-07 22:37:19.639 214 214 F DEBUG : #04 pc 00005dd7 /system/lib/libril.so
05-07 22:37:19.639 214 214 F DEBUG : #05 pc 0003f86f /system/lib/libc.so (_ZL15__pthread_startPv+30)
05-07 22:37:19.639 214 214 F DEBUG : #06 pc 00019e49 /system/lib/libc.so (__start_thread+6)
[LG Optimus 4X HD] csk1jw:
Marshmallow update

I finally nailed down the SIGSEGV error in RIL blobs. It was root cause to libbinder changes to Parcel class with the new ashmem tracking. I ported DISABLE_ASHMEM_TRACKING from CM-13 and now it works with the prestine RIL blobs from LG v20c!!!:victory::victory:

I will start a new thread when new ROM is released for P880. So far, it seems to work similar to Lollipop-5.1.1 in term of WiFi, BT, GPS, NFC and Screen Cast. I expect DRM playback to be broken for now as OMX plugin for secure playback had to be skipped for audio to work properly. I suspect that this has to do with the changes in keymaster module that [MENTION=3326402]dmitrygr[/MENTION] has in his patch for grouper.

[MENTION=5889675]streambinder[/MENTION] I know I had asked it before. Would you branch the MMB device tree for aosp-mm to host my changes?

[MENTION=1149134]Demetris[/MENTION] Would you branch CM kernel for CM-13.0 to host my change?
[LG Optimus 4X HD] csk1jw:
I have started a new thread for AOSP Marshmallow.

http://xdaforums.com/optimus-4x-hd/orig-development/rom-aosp-marshmallow-6-0-1-t3376069

All discussion on AOSP Marshmallow should continue over to the new thread.
[LG Optimus 4X HD] streambinder:
Send me the patches, I will do it.
[LG Optimus 4X HD] oF2pks:
Is there any particular method i can compile (from your github platform_local & local_manifest.xml) this 5.1 rom WITH old zip structure: /system/ && addon.d /app .... /xbin /build.prop ; so it could be booted with fritzcola's twrp 2.8.6 (and patched...) ?

Also the README manifest, for repo, is on 5.1.1_r29 OR 37 ?

Thanks.
[LG Optimus 4X HD] oF2pks:
Any help for LP 5.1.1.37? make wrapper failed

With a repo init on ../manifest -b android-5.1.1_r37 & MoltenMotherBoard/platform_local -b aosp-lp , i broke on:

In file included from hardware/libhardware/include/hardware/camera.h:20:0,

from device/lge/p880/CameraWrapper/CameraWrapper.cpp:33:

hardware/libhardware/include/hardware/camera_common.h:27:39: fatal error: system/camera_vendor_tags.h: No such file or directory

#include <system/camera_vendor_tags.h>

^

compilation terminated.

make: *** [mmb/target/product/p880/obj/SHARED_LIBRARIES/camera.tegra_intermediates/CameraWrapper.o] Error 1

#### make failed to build some targets (05:48:12 (hh:mm:ss)) ####

Do you have any helpy advice?

BTW : I try XDA [MENTION=5132229]xpirt[/MENTION] Elluel's method(github), for old fashion ota.zip:

http://xdaforums.com/android/software-hacking/how-to-conver-lollipop-dat-files-to-t2978952

project build/

diff --git a/core/Makefile b/core/Makefile

-	--block \

project system/extras/

diff --git a/ext4_utils/wipe.c b/ext4_utils/wipe.c

+#ifndef NO_SECURE_DISCARD

....
[LG Optimus 4X HD] Jay Genita:
How To Install Odin Or Recovery?
[LG Optimus 4X HD] AndroidholicCOL:
Why developers stopped working on Lollipop ROMs for P880?? Neither this one nor Euphoria have been updated for several months!
[LG Optimus 4X HD] Daniel Kng:
To all of you guys: We all stopped working on these ROMs because we no longer own the P880. For me, I'm now in the OnePlus section. And I can say, it's a pleasure to be away from the P880 and it's also a Pleasure to no longer work for it. It's a bad device. I'm sorry if you still want an Update on a ROM.
[LG Optimus 4X HD] larswars:
[emoji45] [emoji24]
[LG Optimus 4X HD] csk1jw:
Why don't you try out AOSP Marshmallow or CM-13 ROM if you still plan to keep this device?
[LG Optimus 4X HD] oF2pks:
Unfortunately Marshmallow does not boot with Fritzcola' multirom (even on primary rom), whereas your Lollipop works fine: Lollipop can be booted with kexeced-Nameless' anykernel2 as primary rom or as 2nd Rom (after extract and rezip).

Thanks for help, i'm really impressed with your 2015/2016 works.
[LG Optimus 4X HD] b886b:
I think Marshmallow roms are way too heavy for our device, as it only has 1gb of ram. Although I admit that this device kind of suck but it is still quite functional with kitkat rom and developers like alfsamsung & csk1jw are still working hard to get the best out of our device which I very much admire. By the way, [MENTION=5799877]csk1jw[/MENTION] is it possible for you to release an anykernel with zram support ? As at this very particular moment there is only one kernel in anykernel format that has zram.
[LG Optimus 4X HD] cartmaneric:
hello,

im trying to put lollipop aosplp-20151122-p880.zip on my lg phone but my screen stuck on "patching system image unconditionally".

im doing this for the first time so i dont know if i've done everything right.

first i unlocked bootloader, my phone unrooted itself so i had to root it again. i put the .zip files of lollipop and Gapps on my memory card, installed twrp, then made backup and factory reset. then i tried to install lollipop and i get stuck on "patching system image unconditionally". have i missed something, or how can i solve this problem?
[LG Optimus 4X HD] Gilgamesh_7:
Could someone please re-upload the last update for the Lollipop rom for P880?
[LG Optimus 4X HD] ze7zez:
OTA ROM

Here you are.

p880-ota-eng.lmy49jz_2016-04-24.zip

There must have been some reason that the file was deleted.

If [MENTION=5799877]csk1jw[/MENTION] wants, I will remove the link.
[LG Optimus 4X HD] khan.cross:
Lollipop working good on my P880 however problems with saving contacts to SIM card, the option SIM card is not displayed. Any ideas?
[LG Optimus 4X HD] CrazyWinner:
Last build us running perfectly :D camera works great i can get pictures and videos. I am trying NFC now :)

Edit:working perfectly
[LG Optimus 4X HD] streambinder:
Has anyone else experienced that?

Dude, you'll need to go to fastboot mode (adb reboot oem-unlock) and from there fastboot-flash recovery image with: fastboot flash recovery /path/to/recovery.img
[LG Optimus 4X HD] Streetdragon:
i have no idea what you mean with that. i can only enter the rom or i can do S/W Upgrade. Thats all.

i need a guide. i dont know, what this adb is or where i have to enter it
[LG Optimus 4X HD] moneyvirus:
Sorry [MENTION=5889675]streambinder[/MENTION] same problem here to with the recovery i got a red triangeld android. and i got mobile data working but no out going calls possible.
[LG Optimus 4X HD] xperia u20i:
does that erase internal internal sd card?

i have backup of my current working rom on device\data\media\clockworkmod and right now i cant access it....
[LG Optimus 4X HD] Streetdragon:
something with that? http://xdaforums.com/showthread.php?t=2588979

i installed it. but bothing happen in S/W
[LG Optimus 4X HD] CrazyWinner:
I did not get any issues with recovery. I can access recovery after flashed ROM. Was your recovery up to date ?
[LG Optimus 4X HD] Streetdragon:
Was up to date!

i can enter the fastboot. but how can i flash a other recovery? all i got is < waiting for device > i entert fastboot flash recovery recovery.img

i stuck at waiting for device
[LG Optimus 4X HD] CrazyWinner:
Just install adb drivers ,copy cmd.exe to your adb directory and run as administrator. Try again then .
[LG Optimus 4X HD] Streetdragon:
with install adb drivers you mean run the adb? if yes, it doesnt helped

how do i install the fastboot driver for this stupid phone?
[LG Optimus 4X HD] streambinder:
Install ADB drivers.

Open CMD as administrator and go into ADB folder; once you're there, use this command to reboot into fastboot mode:

adb reboot oem-unlock

Wait few moments, and when it's ready, check if it's so:

fastboot devices

If so, flash back recovery:

fastboot flash recovery /path/to/recovery.img
[LG Optimus 4X HD] xperia u20i:
i can't enter to fastboot, so i'm an idiot or what...so many tutorials that i'm totally confused now...i can't even think because i'm in hurry, damn...:eek:
[LG Optimus 4X HD] Streetdragon:
Ok i did it...... all i made was installing "CT_HsPhone_General_Drivers" this driver after the adb reboot.